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HS Code |
183034 |
| Cas Number | 75-66-1 |
| Molecular Formula | C4H10S |
| Molecular Weight | 90.19 g/mol |
| Appearance | Colorless liquid |
| Odor | Strong, unpleasant, skunk-like odor |
| Boiling Point | 64 °C |
| Melting Point | -126 °C |
| Density | 0.840 g/cm³ at 20 °C |
| Solubility In Water | Slightly soluble |
| Flash Point | -18 °C (closed cup) |
| Vapor Pressure | 387 mmHg at 20 °C |
As an accredited Tert-Butyl Mercaptan factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Tert-Butyl Mercaptan is packaged in a 500 mL amber glass bottle with a secure, leak-proof cap and hazard labeling. |
| Shipping | Tert-Butyl Mercaptan is shipped as a hazardous chemical, typically in tightly sealed, corrosion-resistant containers, such as drums or cylinders, under a nitrogen atmosphere. Shipping must comply with DOT regulations due to flammability and toxic vapors. Proper labeling, documentation, and emergency response information are required for safe transportation. |
| Storage | Tert-Butyl Mercaptan should be stored in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and incompatible materials such as oxidizers and acids. Store in tightly closed, properly labeled containers designed to prevent leaks. Keep away from ignition sources, and use grounded equipment due to its flammability and volatile, strongly odorous nature. Follow all relevant safety regulations. |
Applications of Tert-Butyl Mercaptan in Industrial ManufacturingTert-Butyl Mercaptan plays a critical role in a defined range of chemical manufacturing sectors, where its unique properties meet stringent industry performance and compliance demands. As the original producer, we supply this material to select industrial customers with established downstream integration. Below, we outline primary applications, technical requirements, and downstream use cases as observed in real commercial practice. 1. Natural Gas OdorizationOperators throughout the energy sector employ Tert-Butyl Mercaptan as a high-impact odorant for natural gas, ensuring rapid leak detection and user safety. Its strong, distinctive smell and chemical stability under pipeline conditions have resulted in widespread regulatory approval within multiple national gas supply networks. Formulation varies according to gas throughput, seasonal demand, and customer requirements, but precise dosing is controlled via calibrated injection systems at distribution points. The material enters the flow after raw gas purification and compression but before public or commercial distribution. End applications include residential, commercial, and industrial piped gas supplies. Industry compliance standards
Typical usage ratio
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2. Chemical Intermediate for Agricultural Pesticide SynthesisAgrochemical manufacturers utilize Tert-Butyl Mercaptan as a reactive sulfur donor during the synthesis of specific pesticide actives, such as thiol-containing herbicides and insecticides. Its thiol group allows for efficient functionalization in controlled batch processes, under anhydrous and temperature-controlled reactor environments. Batch chemists adjust the quantity of this raw material according to the active ingredient’s molecular yield and required purity. After the primary reaction step, the product undergoes distillation and purification before formulation into sprayables, granules, or concentrated emulsions. Marketed products often target broadleaf weed management or pest control in cereal, fruit, and vegetable crops. Industry compliance standards
Typical usage ratio
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3. Polymerization Chain Transfer Agent in Plastics ManufacturePolymer producers introduce Tert-Butyl Mercaptan as a controlled chain transfer agent during free radical polymerization, particularly in the production of acrylate, styrene, and butadiene-based resins. The thiol structure constrains polymer molecular weight and modifies end-group functionality, providing manufacturers with a tool to fine-tune mechanical properties, melt flow, and processing behavior. The material is dosed into the monomer feed stream, often at ppm levels, dependent on the desired polymer chain length and type. The outcome influences the production of thermoplastic elastomers and specialty acrylics for automotive, electronics, and industrial coatings markets. Industry compliance standards
Typical usage ratio
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4. Odorant for Liquefied Petroleum Gas (LPG)LPG distribution networks employ Tert-Butyl Mercaptan as a key odorant to facilitate human detection of leaks in environments where propane or butane is supplied in bulk or cylinders. Its volatility profile suits LPG phases, with minimal reaction or loss under high-pressure conditions. Operators dose the chemical automatically, based on fill volume and target olfactory threshold, ensuring regulatory compliance and public safety. The process incorporates dosing at bottling plants or primary transfer stations, post-liquid separation and prior to cylinder filling or bulk tanker loading. Manufactured LPG products then serve residential, hospitality, industrial heating, and mobile applications. Industry compliance standards
Typical usage ratio
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Tert-Butyl Mercaptan stands out among thiol compounds for its reliable performance and consistent results in odorant applications. Years of hands-on experience in synthetic chemistry have taught us the value of a pure, stable, and easily handled mercaptan, particularly for companies working with natural gas and LPG systems. In our own operations, we focus on producing Tert-Butyl Mercaptan at industrial purities that suit safety-critical utility work, recognizing how trace impurities can alter performance and safety margins.
The molecular structure of Tert-Butyl Mercaptan (TBM, C4H10S) grants it volatility and a strong odor profile. Our manufacturing lines have been tuned over the years for repeatable, low-impurity output, as end users expect predictable dosing and minimal residue in their processes. Most customers recognize its model by the CAS number 75-66-1 and its distinct, powerful thiol scent, which remains noticeable even at ppm-level concentrations in air.
From a production standpoint, each lot undergoes gas chromatography to guarantee tight control of purity, usually above 99 percent, and ensures stability during transport and long storage. We maintain specifications that our own filling teams can verify by simple field tests, such as gas detection and pressure checks. Our bottles, cylinders, and bulk containers stay dry and air-free, preventing oxidative byproducts. Anyone working with chemical manufacturing will appreciate how much effort goes into logistics to avoid contamination, especially for sulfurous organics.
The most common destination for Tert-Butyl Mercaptan is the natural gas industry, where pinpointing leaks saves lives and property. We work with gas utilities who depend on reliable sulfur compounds to impart a noticeable odor to otherwise odorless gas streams. TBM is a preferred choice because of its pungency and chemical compatibility with a range of hydrocarbons. Having watched maintenance crews demonstrate the use of TBM in training centers, we have seen firsthand how it triggers instant detection, even at low release rates.
Besides gas odorization, TBM finds its place in several specialty chemical syntheses. Certain organic reactions need a well-behaved tertiary thiol, and Tert-Butyl Mercaptan supplies good yields and reproducibility. The ease of handling its liquid form reduces risk in the lab and in production environments. From a manufacturer’s perspective, we respond to requests from contract synthesis firms who rely on consistent batches year after year, especially when regulatory rules around sulfur residue fluctuate.
Through our regular customer surveys, we also notice demand from analytical labs that use TBM as a trace standard in instrument calibration. The strong, characteristic odor signature allows for quick confirmation of instrument performance during calibration routines, reducing downtime and maintenance errors.
Out of the many mercaptans and thiols available, Tert-Butyl Mercaptan demonstrates a stability threshold and odor note that put it in a class of its own. Our technical staff have run comparative tests against other odorants like n-Propyl Mercaptan, Ethyl Mercaptan, and blends of methylated thiols. TBM’s higher volatility at room temperature gets it into the gaseous phase with ease, without premature decomposition or loss in closed systems. From practical experience, TBM shows less tendency to oxidize into sulfides and disulfides during normal storage than certain linear-chain mercaptans, lowering the risk of foul-smelling byproducts and unplanned shutdowns.
We have collaborated with end users who previously used Ethyl Mercaptan (EM) as a standard odorant. EM supplies a strong odor but can cause more corrosion on metals over years of dosing; feedback from tank maintenance crews often points to fewer deposit issues with TBM. Our plant engineers gauge each product’s ease of storage and residue impact by cleaning returnable cylinders. TBM consistently shows minimal residue, lowering the cleaning burden and keeping logistics costs in line.
From a chemical manufacturing standpoint, producing TBM requires strict air and moisture exclusion, which differs from some other mercaptans that tolerate slightly lower quality controls. This production consistency translates to fewer field complaints and reduced rework. Practical lessons from product recalls and analysis of customer returns have underlined that TBM’s tertiary carbon center gives it better shelf stability than products like n-Butyl Mercaptan or Propyl Mercaptan, which can show gradual decomposition under suboptimal storage.
Odor threshold remains an area where TBM commands respect. Customer feedback highlights that TBM’s warning signal reaches human detectors at concentrations lower than many alternatives, improving worker safety margins. During routine training at municipal gas utilities, we have seen new recruits reliably identify TBM leaks well before gas detection meters hit alarm levels. This degree of performance owes to the blend of molecular size, vapor pressure, and high sulfur activity inherent in the ingredient.
Manufacturing TBM brings its own set of challenges and improvements year after year. The move to more automated control in our reactors produced steadier yields and a cleaner product profile. At our facilities, technicians monitor real-time sulfur dioxide and oxygen levels, preempting runaway reactions which can degrade both safety and output. Direct experience has shown us that maintaining cleanliness in downstream piping and valves offers measurable benefits, as polymer formation in delivery lines drops to near zero with disciplined handling.
From a quality assurance standpoint, in-house storage tanks and filling lines adhere to an almost pharmaceutical-grade cleanliness. We’ve established tank rotation schedules and continuous purge systems so each customer shipment matches the last, and field complaints stay rare. Our long-term relationships with key customers rest on this reliability. Every improvement traces back to minimizing batch-by-batch differences, in both bulk and small-pack containers packed for research labs or specialty blenders.
Direct work in the plant provides a hands-on appreciation of TBM’s behavior in the real world. A small release produces an intense odor impact across large spaces, emphasizing the importance of correct transfer procedures and tight fitting on all lines. Training new technicians over the years has reinforced that complacency in handling thiols leads to chronic workplace complaints, and even minor leaks quickly bring unwanted attention. Our best practices focus on quick connections, continuous monitoring during fills, and rapid remediation of detected leaks, with teams equipped for immediate containment.
TBM’s relatively high vapor pressure means it vaporizes quickly at ambient conditions, spreading easily during any accidental release. Our storage areas are ventilated thoroughly, and we use pumped extraction at the fill point to keep worker exposure well below established limits. Regular air sampling verifies that plant environments stay safe, and our internal documentation stresses the importance of full protective gear in every transfer, as repeated, unchecked exposure can cause sensitization in some individuals. We have learned that even a short lapse in glove use or mask fit results in strong, lingering odor and discomfort among staff.
Given TBM’s volatility and low odor threshold, we advocate for double containment in all bulk storage and field transportation. This double-walled system, combined with real-time gas detection on tanker and drum fleets, prevents accidental releases. Over time, these improvements have paid off in sharply reduced field complaints—a fact reflected in insurance savings for both us and our customers.
With increasing scrutiny around sulfurous emissions and workplace safety legislation, manufacturing TBM responsibly means constant adaptation. Our team stays updated on local and international requirements regarding sulfur transfer and residue management. Every production cycle involves scrubbers and vapor recovery systems that cut down our emissions footprint. We test treated effluents regularly, and have taken part in regulatory audits that demand documented reductions in on-site odor and air releases. These efforts mean our site neighbors report fewer nuisance odors, and customer shipments carry full environmental documentation.
In production runs, process optimization has allowed us to recover almost all raw sulfur content, in line with evolving compliance demands. The industry is moving toward near-zero waste, and each season brings new advances in post-process material recycling. Our senior chemists now review alternative feedstocks and catalysts regularly, choosing materials that reduce hazardous byproducts without compromising final product quality.
On the customer side, more buyers request detailed environmental impact statements and life-cycle analysis as part of their procurement. Our technical support team answers these calls with regular, data-driven reports drawn from plant logs and third-party audits. Keeping current with eco-certification trends builds long-term supplier relationships in a market where regulatory environments shift year by year.
Clients from the natural gas and specialty chemical markets frequently contact us for advice and troubleshooting—sometimes for issues as simple as safe venting, sometimes for complex odorant blending. Over years of engagement, we have built a body of field experience that informs our product improvements. Early adopters of newer dosing technology relay how TBM’s purity simplifies calibration and system startup. Our customer service logs show markedly fewer questions about unexpected residues or batch variability since implementing advanced filtration and on-site analytical controls.
Growing feedback from international clients has shaped how we package and label TBM. In recent years, more distributors and end users have set stricter labeling and container certification requirements, especially for cross-border shipments. Responding to these needs, we have revised our own procedures and invested in updated container tracking systems. We track each drum or cylinder with data entries that record production date, fill details, and inspection status, which customers can reference as needed. This approach minimizes miscommunication and strengthens confidence, especially as many buyers face tightening safety audits.
Handling large-scale quantities of a potent odorant like Tert-Butyl Mercaptan brings operational challenges that cannot be solved by recipe alone. Workforce training and structured maintenance programs make a concrete difference, and we have found more value in regular hands-on training than in remote instruction or manuals. Every new operator participates in live, supervised transfer sessions using plant equipment. By investing in ongoing training and safety updates, we sustain knowledge transfer even as experienced staff retire.
Logistics, too, pose real-world difficulties for TBM shipments. Weather extremes, from summer heatwaves to freezing winters, can affect storage and transfer. Our teams developed climate-specific loading procedures and have adapted shipper certifications to meet regional laws. In regions with frequent temperature swings, preheating or cooling of containers ahead of transfer, along with real-time temperature monitoring, delivers more predictable bulk handling and reduces field loss.
Customer requests for smaller, refillable containers have increased, reflecting a trend toward decentralized, just-in-time dosing. We adapted our filling lines for shorter runs and tested out new container materials resistant to sulfur exposure, extending equipment lifespan and maintaining product integrity. These iterative improvements come from day-to-day problem solving and discussions with field engineers.
Waste treatment for odorous sulfur byproducts is another issue every manufacturer faces. Our site launched a pilot adsorption unit, capturing trace sulfur in vent gas before release. By sharing learning and data with regulatory agencies, we help nudge the industry forward while refining our own best practices. These efforts pay back both in reduced community complaints and in improved worker comfort within our site boundaries.
Our investment in a technical support team pays off whenever a major customer calls with a dosing question or when instrument drift appears during an audit. By keeping a direct line between plant chemists and client engineers, we resolve problems before they become disruptions. We rely on maintenance logs, ongoing product tests, and a review of returned containers to identify and respond to trouble trends early. This feedback cycle powers ongoing upgrades, both in process equipment and in product consistency.
We host regular workshops and plant tours for major utility and industrial buyers, helping demystify the chemistry of Tert-Butyl Mercaptan and its practical handling. These direct exchanges produce straightforward, actionable feedback which in turn drives small but important improvements in product formulation, labeling, and documentation. Each new insight, whether caught by a plant supervisor or shared by a field applicator, contributes to gradual gains in reliability and ease of use.
From decades in the business, we understand that buyers of chemicals like Tert-Butyl Mercaptan place a premium on consistency, responsiveness, and technical know-how. Our own production process has evolved through deep engagement with field users, environmental regulators, and technical partners. Each batch carries the mark of learned experience, tight controls, and a willingness to adapt as the industry advances.
Tert-Butyl Mercaptan’s central role in gas safety, specialty chemical synthesis, and analytical science keeps us focused on continuous improvement, meticulous attention to contamination control, and customer-centered service. The lessons learned in both the plant and the field support every shipment, assuring users they work with a manufacturer that truly understands the product and its application, day after day, year after year.