At 98 wt% H₂SO₄, industrial sulfuric acid is a dense, hygroscopic, non-fuming liquid with a specific gravity of 1.84 g/cm³ at 20 °C and a boiling point of 337 °C. Industrial Sulfuric Acid 98% Bulk Supply: Safety Handling & Global Shipping operates within a distinct regulatory and engineering envelope: carbon...
Sulfuric Acid Grades Explained: 98%, 93%, 78%, Battery and Electronic begins from hydration chemistry rather than simple dilution arithmetic. Contact-process acid is held at 93.0 wt% or 98.0 wt% by adjusting the absorber water balance and oleum cross-feed, while 78.0 wt% acid is usually obtained by controlled dilution or as...
The Chinese national standard GB/T 534-2024 is the normative reference for industrial sulfuric acid sold as concentrated acid or oleum. It is not limited to total acidity; it fixes grade-dependent maximum mass fractions for iron, arsenic, lead, mercury and cadmium. A buyer that requests only 98.0% H2SO4 without the impurity...
Mercury Content in Sulfuric Acid: Why It Decides Price and Process Fit In merchant sulfuric acid transactions, mercury content operates less as a routine certificate-of-analysis value and more as a hidden process constraint. Sulfuric acid derived from metallurgical off-gas carries mercury from roasted zinc, copper, and lead ores; sulfur-burned acid...
A Certificate of Analysis for sulfuric acid functions as a lot-level analytical contract, not a generic product datasheet. The document should identify the production lot, the release specification, the sampling date, the numerical result, the test method, and the acceptance limit for every reported property. Sulfuric acid is supplied in...
Commercial sulfuric acid moving through drum-fill terminals is rarely described by total acidity alone. The production path determines which trace constituents remain after final absorption, and those constituents become analytically visible once the material is held in a 200 L UN 1H1 high-density polyethylene drum. Concentrations in the range 93.0...
Sulfuric Acid Dilution and Heat of Mixing: Doing It Without an Accident Sulfuric acid (CAS 7664-93-9, UN 1830 for acid above 51 wt%) is a dense, high-boiling mineral acid. A 98 wt% technical grade has a density of approximately 1.84 g·cm⁻³ at 20 °C and a normal boiling point near...
Sulfide vs Sulfur Feedstock: Reading the Origin Behind Your Acid Spec Sulfuric acid (CAS 7664-93-9) enters merchant supply chains from two primary sulfur carriers: elemental sulfur and sulfide-bearing metal concentrates. The certificate of analysis is a feedstock record because the impurity distribution differs between a sulfur furnace and a sulfide...
Under 49 CFR 172.101 and the UN Model Regulations, sulfuric acid shipments are split into four proper shipping names: UN 1830 Sulfuric acid with more than 51% acid, UN 2796 Sulfuric acid with not more than 51% acid, UN 1831 Sulfuric acid, fuming, and UN 1832 Sulfuric acid, spent. The...
Sulfuric acid shipped at 98% concentration is classified as UN1830 when the acid content exceeds 51%; below that threshold UN2796 applies. The density of 98% acid at 20°C is approximately 1.84 g/cm³, and this value directly governs payload in every packaging mode. The comparison of ISO Tank vs Drum vs...
Quantifying the amount of sulfuric acid that can be placed in an ISO tank or a 20 ft freight container requires a distinction between nominal volume and legally permitted loaded mass. Commercial 98% sulfuric acid has a density of approximately 1.84 g/cm³ at 20°C, and a 25,000 L tank barrel...
Materials of Construction for Sulfuric Acid: What You Must Never Use is an exclusion matrix bounded by concentration, temperature, flow, and oxidant load. Sulfuric acid changes from reducing to oxidizing behavior within the 65–85 wt% window, and a material that withstands 98 wt% acid at 25 °C can fail rapidly...
Battery Fluid vs Concentrated Acid: Shipping Under UN 2796 and UN 1830 Sulfuric acid moves through international supply chains under two regulatory identities that divide diluted battery fluid from concentrated acid at a precise concentration boundary. Sulfuric acid with not more than 51% acid by mass, including lead-acid battery electrolyte,...
The document-control phrase “IMDG, ADR and IATA for Sulfuric Acid: The Documents You Actually Need” is best understood as a mode-specific matrix rather than a single universal form. Sulfuric acid is assigned under all three codes by dangerous goods list entries, and the correct entry changes with concentration and physical...
Sulfuric acid (CAS 7664-93-9, H2SO4, molecular weight 98.079 g mol−1) is a dense, non-flammable inorganic acid with a specific gravity of 1.84 at 20 °C for 98 wt% material and a normal boiling point of 337 °C. Sulfuric Acid Spill Response: Neutralisation and Site Planning must separately address concentrated product,...
China Sulfuric Acid Export Suspension 2026: What Buyers Must Know begins with the recognition that bulk sulfuric acid is a tonnage industrial intermediate, not a fungible finished chemical across all applications. The suspension affects shipments declared under HS 2807.00 for technical-grade 98% acid, 93% acid, and oleum because a cargo...
Which Grades Can Still Be Exported from China in 2026? Electronic-Grade Route Shipment classification for sulfuric acid exports from China in 2026 remains tied to HS code 2807.00.00 and the corrosive-liquid transport codes UN 1830 for sulfuric acid containing more than 51 wt% H₂SO₄, UN 1831 for fuming sulfuric acid,...
Sulfuric Acid Sulfuric acid (H2SO4, CAS 7664-93-9) and oleum (fuming sulfuric acid, CAS 8014-95-7) are produced and shipped as industrial acids with total acidity expressed as weight percent H2SO4 equivalent. Concentrated acid at 98% H2SO4 has a density of 1.84 g/cm³ at 20 °C; oleum at 20% free SO3 has...
Commercial sulfuric acid is most frequently handled as a clear, heavy liquid with a concentration of 93–98 wt% H₂SO₄; the 98 wt% grade is assigned UN 1830 when the acid content exceeds 51 wt%, while dilute grades not exceeding 51 wt% are assigned UN 2796. Oleum is a separate product...
The aggregate monthly declarations for HS 2807.00.00, read against the phrase “China Sulfuric Acid Export Quota: What the Numbers Suggest,” do not reveal a fixed government-issued tonnage cap. The data instead behave as a residual accounting identity: domestic phosphate demand, smelter acid production, coastal storage capacity, and chemical tanker availability...
For sulfuric acid buyers, the two compliance deadlines—China Hazchem Law and EU CLP 2026—do not run in parallel. The China obligation attaches to the first import transaction; the EU obligation attaches to a calendar cutoff. Concentrated sulfuric acid (CAS 7664-93-9, EC 231-639-5, UN 1830) and aqueous solutions of sulfuric acid...
Sulfuric Acid HS Code 2807.00: Classification Traps Between Acid and Oleum remains an under-controlled declaration issue because the Harmonized System heading 28.07 groups concentrated sulfuric acid, diluted acid, battery electrolyte, and fuming sulfuric acid into a single six-digit lane. The WCO legal text for 2807.00 reads “sulphuric acid; oleum,” which...
Commercial sulfuric acid enters Indian tariff administration under HSN 2807 00 10, CAS 7664-93-9, a mineral acid with molecular mass 98.079 g/mol and a 98% grade density of 1.84 g/cm³ at 25 °C. In 2026 trade data, the search-pattern “Sulfuric Acid Import Duty into India 2026: Why Sources Disagree 14.31%...
Sulfuric acid (CAS 7664-93-9) is a dense, highly reactive mineral acid with molecular weight 98.08 g/mol and EC listing 231-639-5. Concentrated merchant material is supplied predominantly at 93% to 98% H₂SO₄, while oleum grades contain free SO₃ above 100% acid equivalent. At 20 °C, 98% acid has a density of...
Cutting Sulfuric Acid Duty with FTAs: ASEAN-India, RCEP and Chile Industrial sulfuric acid is traded under HS 2807.00 as a high-tonnage liquid with a specification envelope that typically spans 93–98 wt% H2SO4, with oleum handled separately under the same heading. The product is consumed in phosphate fertilizer acidulation, metal leaching,...
Importing concentrated sulfuric acid in bulk or package form requires alignment among the commercial invoice, the dangerous goods declaration, and the receiving terminal’s tank inspection records. The substance is identified by CAS number 7664-93-9 and enters the United States under HTSUS 2807.00.0000. Industrial shipments at 93%, 96%, and 98% H2SO4...
An import tax stack for sulfuric acid is constructed differently in the three target jurisdictions because each applies a distinct sequence of customs duty, value-added or turnover tax, industrial excise, and local cess-like charges. The present technical scope is Brazil, Mexico and Vietnam: Sulfuric Acid Import Tax Stack and Local...
Sulfuric Acid Price per Ton 2026: China FOB, India CFR and Europe Compared The 2026 sulfuric acid market presents a split benchmark problem. Price reporting agencies publish China FOB, India CFR, and northwest Europe ex-works or delivered ranges that are not directly comparable because they contain different freight, insurance, assay,...
Why Sulfuric Acid Price Sources Disagree: $125 vs $205 vs $310 per Ton Sulfuric acid (CAS 7664-93-9, UN 1830) is produced globally as virgin acid from sulfur burning, smelter byproduct acid from metallurgical gas cleaning, regenerated acid from spent acid decomposition, and oleum with free sulfur trioxide. A delivered or...
Sulfuric acid capacity is frequently compared using The Three Acid Routes: Sulfur-Burned vs Smelter vs Pyrite Cost Breakdown, because feedstock, energy recovery, gas cleaning and residue management are allocated differently in each route. Elemental sulfur combustion generates a clean 10–12 vol% SO2 gas with minimal dust and metals. Smelter off-gas...
Sulfur Feedstock and Sulfuric Acid Pricing: Reading the Signal begins with the molar relationship between sulfur and sulfuric acid. One metric tonne of elemental sulfur, at 100% conversion, yields 3.06 tonnes of 100% H₂SO₄, corresponding to approximately 3.12 tonnes of 98 wt% commercial acid. The quoted sulfur price therefore cannot...
Contract buyers assessing the Sulfuric Acid Price Forecast H2 2026: What to Watch Before You Book question typically review three variables before fixing a quarterly or semiannual nomination: the sulfur component, the regional balance of burned and byproduct acid, and the logistics constraints that determine whether a quoted f.o.b. price...
Sulfuric acid, CAS 7664-93-9, EC 231-639-5, is manufactured through the contact process: dried sulfur is burned to sulfur dioxide, SO2 is catalytically oxidized to SO3 over a cesium-promoted vanadium pentoxide bed at 400–450 °C, and SO3 is absorbed in circulating 98.5 wt% sulfuric acid to avoid the mist formation that...
Sulfuric Acid Supplier in China: How to Verify a Real Producer in 2026 is fundamentally an exercise in layered document control and hardware triangulation. Sulfuric acid, CAS 7664-93-9, EC 231-639-5, UN 1830, hazard class 8, is produced in China through sulfur burning, metallurgical off-gas, and pyrite routes. The procurement task...
Sulfuric acid (CAS 7664-93-9, HS code 2807.00.00, UN 1830) is traded from China as 92.5% technical grade, 98.0% concentrated grade, and oleum with 20% or 25% free SO3. “Concentrated” alone is not a specification; a contract should fix total acidity, residue on ignition, iron, arsenic, mercury, lead, transparency, and colour...
Concentrated sulfuric acid (CAS 7664-93-9, EC 231-639-5) is supplied as UN 1830, Class 8, Packing Group II when the acid mass fraction exceeds 51%; dilute grades at or below 51% move as UN 2796, and spent acid as UN 1832. Fuming sulfuric acid, oleum, is UN 1831 and is excluded...
Why Two Sulfuric Acid Quotes Differ: Route, Concentration and Freight Two sulfuric acid quotations that appear identical on a wet-tonne basis can diverge by more than 15% after the production route, concentration-normalized acid basis, and freight classification are reconciled. A quote for 98.0 wt% acid from a sulfur burning unit...
Incoterms for Sulfuric Acid: FOB, CIF and DAP Compared for Buyers Bulk sulfuric acid purchasing is as much a transfer of custody under the ICC Incoterms rules as a specification exercise in total acidity, density, and iron content. In concentrated form, commercial acid typically moves at 93.2 % or 98...
Spent Acid Regeneration vs Buying Fresh: What Off-Takers Should Compare Industrial sulfuric acid off-takers assessing spent acid regeneration against merchant virgin acid purchase compare more than delivered price per tonne. The decision is determined by the mass of recoverable H2SO4 in the spent stream, contaminant partitioning across the regeneration furnace,...
Sulfuric Acid for Phosphate Fertilizer: What MAP and DAP Plants Actually Buy Sulfuric acid entering a monoammonium phosphate (MAP) or diammonium phosphate (DAP) complex is procured as a specification-defined acidulation reagent rather than a generic chemical. The fluorapatite acidulation reaction Ca10(PO4)6F2 + 10 H2SO4 + 20 H2O → 6 H3PO4...
Copper heap leaching with sulfuric acid: concentration and consumption basics require separating the free acid strength of the circulating solution from the total acid consumed by the ore. Crushed copper ore is stacked in lifts and irrigated with raffinate from solvent extraction, re-acidified to maintain free H₂SO₄ at 5–20 g/L....
Sulfuric Acid in Titanium Dioxide Production: Sulfate Route Demand is concentrated in the digestion section, where technical-grade H2SO4 functions as a decomposition reagent for ilmenite and sulfated titania slag. The sulfate route consumes fresh sulfuric acid mainly through iron oxide reactions, weak-acid bleed, washing losses, and neutralization of purge streams....
Sulfuric acid (H2SO4, CAS 7664-93-9, EC 231-639-5, UN 1830) is a diprotic strong acid supplied to hot-rolled low-carbon steel descaling lines as 66°Bé (93.2 wt%), 60°Bé (77.7 wt%), or 50°Bé (62.2 wt%) feedstock. Steel pickling with sulfuric acid: bath control and acid consumption in continuous lines is governed by free...
Battery electrolyte acid: 37% at SG 1.28 and what battery plants specify for lead-acid cell filling is a controlled dilution of sulfuric acid, H2SO4, CAS 7664-93-9, rather than an uncertified commodity mineral acid. The electrolyte supplied to automotive, motive-power, and stationary battery formation lines contains 37.0% H2SO4 by mass and...
Commercial sulfonation of linear alkylbenzene, toluene, and naphthalene for detergent and dye intermediate production shifts from 98 % sulfuric acid to oleum when the equilibrium water generated by the sulfonating agent dilutes the reaction medium below the acid strength required for acceptable conversion. Oleum (Fuming Sulfuric Acid) for Sulfonation: When...
Technical-grade sulfuric acid for municipal and industrial water treatment is typically supplied as 93 wt%, 96 wt%, or 98 wt% liquid with a specific gravity of approximately 1.84 at 20°C for the 98 wt% grade and a molar mass of 98.08 g/mol. The product is registered under CAS 7664-93-9 and,...
Hot-rolled low-carbon steel strip entering cold rolling or metallic coating is descaled in continuous or batch pickling lines. The selection of sulfuric acid vs hydrochloric acid for pickling: cost, speed and waste cannot be resolved by unit acid price alone. Sulfuric acid baths are typically maintained at 10–20 wt% H2SO4...
Can Sulfuric Acid Be Replaced? Substitutes and Their Real Limits Replacement of H2SO4 cannot be assessed by acid strength alone. The molecular weight is 98.08 g/mol, the first dissociation is effectively complete in dilute solution, and the second pKa value is 1.99 at 25 °C. Commercial grades range from 93–98...
Sulfuric acid is consumed in larger volume than any other inorganic acid, with integrated supply chains serving phosphate fertilizer, refinery alkylation, metal pickling, and battery electrolyte production. The comparison of regenerated vs virgin sulfuric acid: purity, risk and price is determined by sulfur feedstock cost, spent acid composition, contaminant tolerance,...
Sulfuric Acid vs Sulfur Dioxide and SO3: Choosing the Right Sulfur Form Sulfuric acid (H2SO4, CAS 7664-93-9) is manufactured through the contact process, in which elemental sulfur is burned to sulfur dioxide, SO2 is oxidized over vanadium pentoxide, and the resulting sulfur trioxide is absorbed in concentrated sulfuric acid rather...
Within the Global Sulfuric Acid Market 2026: Capacity, Trade Flows and Forecasts framework, the product is not a single commodity grade but a family of streams distinguished by production route, impurity profile, and delivery specification. Sulfuric acid is produced as elemental sulfur-burning acid, metallurgical off-gas acid, and thermally regenerated spent...
Where Chinese Sulfuric Acid Goes: Chile, Indonesia, Morocco, Saudi and India Sulfuric acid, H2SO4, CAS 7664-93-9, UN 1830, is the principal heavy industrial acid traded as 92.5 wt%, 96.0 wt%, 98.0 wt%, and oleum grades. Chinese export cargoes are classified under HS 2807.00.00 and are produced primarily from sulfur-burning double-contact...
Industrial-grade sulfuric acid (CAS 7664-93-9) is produced in Chinese chemical parks primarily through contact-process oxidation of sulfur dioxide, with three dominant sulfur carriers: elemental sulfur, nonferrous smelter gas, and pyrite concentrate. The acid molecule has a molar mass of 98.079 g/mol and a density of 1.8305 g/cm³ at 98.0 wt%...
Smelter By-Product Economics: Why Acid Prices Support Copper Margins is best read through the sulphur mass balance of copper concentrate smelting. Sulfuric acid produced from metallurgical off-gas converts a gas-cleaning burden into an output whose net realizable price can offset part of the treatment charge. A pyrometallurgical smelter processing 30%...
In continuous contact-process sulfuric acid production, sulfur is combusted, sulfur dioxide is oxidized over promoted vanadium pentoxide catalyst, and sulfur trioxide is absorbed in circulating strong acid. The product is supplied as 93 wt%, 98 wt%, and oleum grades; oleum free sulfur trioxide content ranges from 20 wt% to 65...
Sulfuric Acid Exposure Limits: EU IOELV, TRGS 900 and UK WEL Compared. Sulfuric acid (CAS 7664-93-9, H2SO4, molecular weight 98.08 g/mol) is processed in alkylation units, metal pickling lines, anodising tanks, and battery formation. The concentrated grade has a density of approximately 1.84 g/cm³ and a boiling point near 337...
Sulfuric acid (H₂SO₄, CAS 7664-93-9, EC 231-639-5, molar mass 98.079 g mol⁻¹) is supplied as a dense mineral acid with a density of 1.84 g cm⁻³ at 20 °C for commercial 98% w/w material. Product documents and storage signage for this substance depend directly on the CLP classification of sulfuric...
Sulfuric Acid and SO2 Emissions: Tail-Gas Rules and DCDA Upgrades Contact-process sulfuric acid production is inseparable from SO2 tail-gas control because catalytic SO2 oxidation does not reach complete conversion. Sulfur-burning plants generate a dried gas stream containing 10–12 vol% SO2, and single-absorption converters typically attain 98.0–98.5% conversion across a four-bed...
Under Commission Decision 2000/532/EC as amended by Commission Decision 2014/955/EU, the European Waste Catalogue (EWC) entry 06 01 01* designates sulphuric and sulphurous acid from manufacture, formulation, distribution and use as hazardous. Sulfuric Acid Waste and Neutralisation: EWC Codes and Disposal Rules therefore begin with the asterisk and the corresponding...
Assessment of Top Sulfuric Acid Manufacturers in China 2026: Capacity, Route and Export Status requires separation of sulfur-burning merchant plants, smelter offgas plants, and residual pyrite-roasting plants. The route determines not only site location and feedstock flexibility but also the exportable product grade, the cost floor, and the way capacity...
At the scale of world chemical logistics, sulfuric acid is commonly reported in the 260–300 million tonne per year range, a broad band because captive smelter output is not always captured in merchant market statistics. In the industrial sulfuric acid economy, the distinction between sulfuric acid producers vs manufacturers is...
Sulfuric acid is traded as technical grade 93–98 %, battery acid, and oleum with free SO3 contents commonly between 20 % and 65 %. How to tell a sulfuric acid producer from a trading company is not resolved by visual inspection or routine density measurement; the distinction is established through...
Merchant-grade sulfuric acid (H₂SO₄) is moved through Chinese coastal terminals under conditions that are not uniformly captured by a single national export-licence register. The 2026 status of a producer depends on three interlocking instruments: a valid hazardous chemicals production licence issued by the provincial Emergency Management Department, a hazardous chemicals...
Published industry surveys covering Sulfuric Acid Production Capacity in China: Plants, Routes and Turnarounds indicate that installed nameplate capacity exceeds 140 million metric tons per year (140 Mt/a), with annual output generally in the 100 million to 110 million metric ton range during recent campaigns. The capacity base consists of...
Sulfuric Acid Factory Direct vs Through a Trader: What Freight Radius Does to Landed Cost Commercial sulfuric acid is a dense, low-vapor-pressure mineral acid sold in grades that typically concentrate between 93% and 98% by mass. Its specific gravity is approximately 1.83 at 20 °C for strong commercial concentrations, which...
An evaluation of sulfuric acid manufacturers by route: Sulfur-Burning, Smelter and Pyrite Compared begins with the recognition that all three routes converge on the same contact-process converter and absorb SO₃ in circulating sulfuric acid, but diverge upstream in SO₂ generation, gas-cleaning burden, waste-heat recovery, and trace-metal rejection. Industrial plants releasing...
Sulfuric Acid Plant Audit Checklist: What to Verify at a Producer Site should be structured around process boundaries rather than equipment lists. A technically defensible verification sequence begins at sulfur receipt and continues through melting, filtration, process air drying, sulfur combustion, catalytic conversion, absorption, cooling, storage, and finished-product loading. At...
Procurement decisions for sulfuric acid are defined by a physical distinction that contract pricing often obscures: metallurgical acid is a by-product of metal refining, while independent acid plant output is a primary manufacturing product. Smelter vs Independent Acid Plant: How Metal Refining Cycles Drive Your Supply is a feed-structure question,...
Where Are Sulfuric Acid Plants in China? A Province-by-Province Sourcing Map China’s sulfuric acid capacity divides into three technical routes with different geographic signatures: metallurgical off-gas acid attached to copper, nickel, lead, and zinc smelters; elemental sulfur-burning acid tied to phosphate fertilizer, caprolactam, and titanium dioxide parks; and pyrite-roasting acid...
Sulfuric acid (H₂SO₄) is a strong mineral acid with molecular weight 98.08 g/mol, density approximately 1.84 g/cm³ at 98 wt%, and atmospheric boiling point near 337 °C. In commercial distribution, the product is divided between captive capacity—acid consumed within the producing facility or integrated complex—and merchant capacity sold to external...
A merchant transaction for sulfuric acid is defined by the point at which product stewardship, quality assurance, and transportation duties transfer among producer, distributor, or end-user reseller. The product is identified as CAS 7664-93-9, is transported under UN1830 for sulfuric acid and UN1831 for oleum, and is commonly traded at...
Technical-grade sulfuric acid is distributed as H2SO4, CAS 7664-93-9, in concentrations ranging from dilute battery electrolyte to 93–98% commercial acid and fuming oleum. Procurement of a sulfuric acid sample for quality verification, process qualification, or laboratory development follows a controlled compliance pathway rather than an unrestricted retail transaction. The sample...
Industrial sulfuric acid is traded as a concentrated mineral acid with grade designations spanning 93 wt%, 96 wt%, and 98 wt% H2SO4, together with oleum grades containing 20% to 65% free SO3. The CAS registry number is 7664-93-9, EC number 231-639-5, and transport identity UN 1830, class 8, packing group...
Supply Security Under Export Controls: Structuring a 2026 Sulfuric Acid Contract Sulfuric acid (CAS 7664-93-9, EINECS 231-639-5, HS 2807.00) is supplied as technical-grade acid, electrolyte-grade acid, and oleum, with transport classifications UN1830 for acid above 51 wt%, UN2796 for acid not exceeding 51 wt%, and UN1831 for oleum. The contact...
Sulfuric Acid — Export Documentation, Licence and Quota Support Sulfuric acid, CAS 7664-93-9, EINECS 231-639-5, is supplied as technical-grade 93.0–98.5% H₂SO₄, battery electrolyte at 35–38% w/w, and oleum grades carrying 20–65% free SO₃. Export consignments fall under HS 2807.00 and are assigned dangerous goods entries that depend on acid strength:...
Sulfuric Acid Landed Cost Calculator: Freight, Duty, Demurrage and Financing structures delivered per-tonne cost for acid purchased as 93.0–98.5 wt% H₂SO₄, CAS RN 7664-93-9, assigned UN 1830 for solutions containing more than 51 wt% acid. A 98.0% acid has a density of 1.84 g/cm³ at 20°C and a boiling point...
Case Study: How a Copper SX-EW Mine Switched Acid Sources Without Stopping Production In copper solvent extraction–electrowinning (SX-EW) circuits, sulfuric acid serves simultaneously as the primary leaching reagent and the dominant electrolyte component. Oxide and secondary sulfide ore heaps are irrigated with raffinate acidified to 5–15 g/L H₂SO₄, producing pregnant...
Sulfuric acid remains the principal acidulation reagent for converting fluorapatite-bearing phosphate rock to wet-process phosphoric acid and phosphogypsum. Phosphate fertilizer production consumes approximately 60% of global sulfuric acid output by mass. In the dihydrate route, fluorapatite Ca5(PO4)3F reacts with 5 mol H2SO4 and 10 mol H2O to yield 3 mol...
Sulfuric Acid Supplier Scorecard: The 10-Point Evaluation Sheet Sulfuric acid, CAS 7664-93-9, is procured as technical-grade 93–98% H₂SO₄, battery-grade electrolyte, or oleum containing nominal 20–65% free SO₃. The molecular weight of H₂SO₄ is 98.08 g/mol, and the acidimetric equivalent is 49.04 g/eq. A 98% acid shipment exhibits a density of...
Documentation Pack for Sulfuric Acid: COA, SDS, COO and Permits Explained Sulfuric acid is moved through bulk terminals, drumming lines, and isotainer transfers as a product with a narrow quality envelope and a layered regulatory profile. Concentrated grade material at 93 wt% to 98 wt% H2SO4, battery electrolyte at 29–32...
Inside a Smelter Acid Plant: How Mercury and Selenium Are Controlled Sulfuric acid produced from non-ferrous smelter off-gases carries an impurity load not present in sulfur-burning acid plants. Roaster, flash-smelting, and converting gases contain sulfur dioxide at 8–14 vol% after dilution and dust removal, along with volatile arsenic, lead, halides,...
Annual Sulfuric Acid Supply Agreements: Volume, Price Formula and Indexation Sulfuric acid (H2SO4, CAS 7664-93-9, EC 231-639-5) is a dense, hygroscopic, strongly oxidizing mineral acid with a molar mass of 98.079 g/mol and a density of 1.84 g/cm³ at 20 °C for commercial 98 wt% material. The compound is the...
Second and Repeat Sulfuric Acid Orders: What Changes in Price and Scheduling is determined by replenishment mechanics rather than first-fill qualification. The initial purchase of concentrated sulfuric acid typically includes tank inspection, passivation of carbon steel per NACE SP0294-2006, vent-dryer verification, and acceptance of the first fill with a defined...
Sulfuric Acid Questions Buyers Ask Us Every Week (FAQ) Sulfuric acid, CAS 7664-93-9, is purchased as technical-grade 93 wt%, 98 wt%, and oleum. The technical questions that recur on purchase orders involve assay conversion, moisture ingress, freezing behaviour, materials selection, contaminant limits, unloading safety, and transport classification. The references cited...
Sulfuric acid (CAS 7664-93-9, EC 231-639-5) is dispatched as technical-grade 98.0 ± 0.5 wt% H₂SO₄, oleum with 20–30% free SO₃, and battery-grade electrolyte at 37.5 wt%. The product is assigned UN 1830, Class 8, Packing Group II for transport. A specific lot is sampled from the production header only after...
Technical Support for Acid Buyers: Storage, Dilution and Corrosion Questions Answered Purchased sulfuric acid is normally specified by concentration, iron content, and residue on ignition under ASTM E223. Bulk deliveries at 93–98 wt% H2SO4 exhibit a specific gravity of 1.80–1.84 at 20 °C and a freezing point that ranges from...
