Hydrochloric acid is marketed as an aqueous hydrogen chloride solution with a commercial concentration commonly between 31 wt% and 36 wt%, corresponding to a density near 1.18 g/mL at 20 °C. The material is classified for transport as UN 1789, Class 8, and commercial grades above approximately 10 wt% hydrogen chloride are generally assigned PG II. Production routes include direct synthesis from chlorine and hydrogen in a graphite or glass-lined combustion chamber followed by absorption in falling-film or adiabatic absorbers; by-product acid generated during chlorinated paraffin or isocyanate production may contain residual chlorinated organic species and requires assay before sale. The combination of corrosivity, potential vapour evolution, and a broad industrial customer base—from carbon steel pickling lines and ion-exchange regeneration to pH adjustment in wastewater—makes the allocation of shipment risk a central commercial issue.

In bulk export transactions, the International Chamber of Commerce Incoterms 2020 rules are commonly used to apportion transport, delivery, customs and dangerous goods obligations. The terms FOB, CIF and DAP produce materially different risk boundaries for a corrosive liquid because the point at which the buyer assumes physical loss or damage does not always align with the point at which the dangerous goods declaration or carrier acceptance is completed. For hydrochloric acid, a misaligned risk boundary may leave a loaded ISO tank container inside a port terminal without a clear responsible party under the contract of sale, even though the carrier has already signed a dangerous goods declaration.

If the term is CIF, who carries marine cargo insurance for UN 1789 shipments?

CIF is restricted to sea and inland waterway transport under Incoterms 2020. The seller must contract for carriage and pay freight to the named destination port, but risk transfers when the hydrochloric acid is on board the vessel at the loading port. Insurance is the differentiating cost element: the seller is required to obtain at least cargo insurance with Institute Cargo Clauses (C) or similar minimum cover. That minimum cover does not automatically insure every loss to which a corrosive chemical is exposed. It typically excludes ordinary leakage, incomplete packing, and inherent vice unless those causes are expressly covered by additional clauses.

For UN 1789 cargoes in ISO tank containers, the marine policy may therefore respond to a vessel stranding or collision but not necessarily to slow weeping from a tank gasket damaged during repeated acid service. Buyers purchasing under CIF should confirm whether the insurance certificate names the cargo as corrosive liquid, includes all-risk cover under Institute Cargo Clauses (A), and removes any exclusion for corrosion or unsuitability of the carrying tank. The seller’s obligation under CIF is minimum cover; if the buyer requires broader cover, the contract must state that deviation explicitly. Claim documentation under CIF includes the bill of lading, insurance certificate, survey report, and the dangerous goods declaration; discrepancies between the declared concentration and the material actually loaded may vitiate cover.

Incoterms for HCl: FOB, CIF and DAP for Dangerous Goods therefore need to be read with the carrier’s terms and the cargo insurance wording, not in isolation. The Incoterm alone does not determine whether a particular leak is insured, whether the demurrage bill is allocated, or whether the dangerous goods filing is accepted by the vessel operator.

Under FOB, the seller’s physical exposure does not end when the truck arrives at the container terminal; it ends only when the acid is placed on board the buyer’s nominated vessel. For a 20 ft ISO tank container, terminal handling, port storage and transfer to the vessel hook are performed before delivery; the seller remains at risk during that period unless the sale contract explicitly shifts terminal charges. In practice, terminal operators often require the dangerous goods declaration, the container safety approval plate under ISO 1496-3:2019 or the ADR tank type plate, and the periodic test certificate before the tank is accepted into the dangerous goods area. If the container fails the terminal’s internal check because the previous test date is not current, the shipment is blocked before the vessel nomination becomes operative.

The seller under FOB is responsible for export clearance and must provide the buyer with the transport document, commercial invoice, and the dangerous goods documents required for the ocean leg. For hydrochloric acid, the seller is usually the shipper for dangerous goods purposes and completes the multimodal dangerous goods declaration; when the buyer’s freight forwarder issues a house bill of lading, the seller should retain the carrier’s signed acknowledgement because liability for a misdeclared Class 8 material can attach to the entity that tendered the cargo.

What changes under DAP when a corrosive liquid crosses the delivery place threshold?

DAP allows any mode and places the seller’s risk on the hydrochloric acid until the goods are placed at the disposal of the buyer on the arriving means of transport at the named destination. The buyer is responsible only for import clearance and any applicable import duties. For a 36 wt% acid delivery to a polyvinyl chloride resin manufacturing site, the seller’s obligation includes the entire road or rail leg, all intermediate storage, and the final position of the tank container at the buyer’s discharge point. If the receiving facility is congested or its unloading pumps are not rated for the product, the seller remains on risk while the tank container waits outside the plant. The term DAP does not create an obligation for the buyer to unload; it only obliges the buyer to take delivery once the goods are available on the arriving vehicle.

Because the seller controls carrier selection under DAP, it must ensure that road carriers have dangerous goods drivers, orange-plate vehicles, and a transport document conforming to the applicable ADR 2023 or national regulation in each transit state. For rail transport under DAP within Europe, RID applies; for inland waterways, ADN applies. For imported acid into the United States, 49 CFR §172.101 governs the domestic truck loading and placarding obligations after the port clearance. The seller’s DAP risk includes delay at border crossings where dangerous goods inspections may need a copy of the safety data sheet and the UN 1789 declaration in the local language. Published logistics cost data for cross-border DAP hydrochloric acid movements is limited; shippers frequently rely on carrier-specific routing notes rather than generic published tariffs.

Packaging and tank selection for hydrochloric acid are a function of acid concentration, temperature and the presence of trace fluorides or chlorinated solvents. Merchant-grade 31–36 wt% acid is routinely shipped in rubber-lined 20 ft ISO tank containers conforming to ISO 1496-3:2019 and carrying a UN T11 portable tank marking for UN 1789. The inner contact surface is commonly a flexible rubber lining or a resin system; unlined carbon steel is not suitable for long-term acid service because hydrogen chloride corrodes the shell and generates hydrogen gas. Smaller volumes are packed in 1H1 plastic drums or 31HA1 composite IBCs; vented closures are required if the product is packaged above 30 °C or if the filling line does not cool the acid. The closing, gasket and fill ratio specification should be obtained from the packaging supplier and validated by a leakproofness test according to the applicable ADR or IMDG packaging instructions.

FOB, CIF, DAP obligation matrix for hydrochloric acid

The matrix below summarises the default Incoterms 2020 allocation for a UN 1789 sea shipment in an ISO tank container; deviations require contract wording.

Of the three terms, CIF generates a recurring insurance gap for corrosive liquids because the mandatory cover is minimum and not all harmful events are insured. A hydrochloric acid shipment in an ISO 1496-3:2019 tank container that loses product through a pinholed rubber lining during the ocean leg is not automatically covered by Institute Cargo Clauses (C); the claim may be denied as a condition of the tank or inherent vice unless the buyer has acquired Institute Cargo Clauses (A) or a named-peril extension for corrosion and leakage. Similarly, FOB places the buyer on risk from on board, but damage caused by a packing defect that began before loading may be recoverable from the seller under the contract of sale only if the buyer can prove the defect existed at the point of delivery. DAP places the broadest physical risk on the seller, but it does not relieve the buyer from the obligation to accept goods that arrive with the proper dangerous goods marks, packing certificate and analysis certificate.

Dangerous goods declaration timing and the carrier’s packing certificate

Carrier acceptance of hydrochloric acid under any Incoterm is conditioned on the dangerous goods declaration being delivered before the cargo is loaded or accepted for road transport. For sea freight, the shipper signs a multimodal dangerous goods declaration stating the proper shipping name HYDROCHLORIC ACID, the class 8, the packing group applicable to the concentration, and the UN 1789 number. The carrier or its terminal agent may require an additional container/vehicle packing certificate certifying that the tank or packages were inspected, the closure system is compatible, and the load is secured. Under FOB and CIF, the seller normally signs this document as shipper; under DAP, the seller remains the shipper for the main carriage but may appoint a logistics service provider to complete the declaration. If the declaration is rejected because the packing group shown does not match the safety data sheet or the concentration on the bill of lading, loading is stopped until the documentation is corrected.

Segregation and stowage constraints must be declared as well. Hydrochloric acid must not be loaded next to Class 4.3 water-reactive substances, cyanides, hypochlorites, strong alkalis, or oxidizing agents that may generate chlorine, heat, or dangerous decomposition products. Marine stowage on deck or under deck for ISO tank containers is subject to the IMDG stowage category assigned in the dangerous goods list; terminal planners may refuse slots if metallic surfaces or food cargo are adjacent. The seller’s production line and loading bay should record the exact concentration, temperature at the time of filling, and the identity of the previous cargo in the tank because cross-contamination with oleum, nitric acid or chlorinated organics can invalidate the dangerous goods declaration.

At the receiving line, closed-loop unloading or venting to a caustic scrubber is required to prevent hydrogen chloride vapour release. Hydrochloric acid must be segregated from sodium hypochlorite storage because acidification releases chlorine gas; contact with cyanide salts releases hydrogen cyanide. The discharge piping and flexible hose should be rated for 31–36 wt% acid at the maximum unloading temperature, and the bund containment should be sized for 110% of the largest receiving vessel capacity. These operational boundaries remain applicable under FOB, CIF and DAP; the Incoterm only shifts cost and risk between seller and buyer, not the chemical incompatibilities or the mandatory dangerous goods controls.