Ethyl Mercaptan (Ethanethiol)

What Is Ethyl Mercaptan?

Ethyl Mercaptan, also known as Ethanethiol, is a highly volatile organosulfur liquid with an extremely strong and recognizable odor. It is primarily used as an odorant for propane and liquefied petroleum gas, as well as a sulfur-containing intermediate in chemical synthesis.

Because its boiling point is close to normal ambient temperatures, Ethyl Mercaptan requires closed handling, vapor control and approved hazardous-material packaging.

Ethyl Mercaptan Product Information

Actual purity and physical-property limits should be confirmed using the approved specification and batch Certificate of Analysis.

Why Is Ethyl Mercaptan Used for LPG Odorization?

Propane and butane are naturally colorless and have little or no warning odor. Ethyl Mercaptan can be detected by smell at very low concentrations, making it useful as an LPG odorant.

A precisely controlled quantity is injected into the fuel stream to provide a recognizable warning odor. The required dosage depends on the fuel composition, applicable standard, odorant quality, distribution system and local regulations.

Ethyl Mercaptan is used primarily for propane and LPG. Natural-gas systems may instead use other mercaptans, sulfides, tetrahydrothiophene or formulated odorant blends.

Odorization must be performed with calibrated, closed equipment and verified against the applicable gas specification.

Main Ethyl Mercaptan Applications

Propane and LPG Odorization

Used to provide a detectable warning odor in otherwise odorless liquefied petroleum gases.

Agrochemical Synthesis

Used as a sulfur-containing intermediate in the manufacture of selected pesticides and other crop-protection chemicals.

Pharmaceutical and Fine Chemical Synthesis

Functions as a thiol reagent or ethylthio-group source in controlled organic synthesis.

Specialty Sulfur Chemicals

Used as a starting material for thioethers, sulfides and other organosulfur compounds.

The required grade should be selected according to the odorization or synthesis application. Gas-odorant and synthesis grades may have different impurity and documentation requirements.

Which Ethyl Mercaptan Specifications Should Buyers Compare?

For gas odorization, buyers should also confirm the applicable standard, dosage basis, odor quality, packaging system and technical support.

Odorant Grade vs Synthesis Grade

Odorant-grade Ethyl Mercaptan is selected for predictable odor intensity, volatility and compatibility with LPG systems. It must be used with suitable metering, storage and injection equipment.

Synthesis grade is normally selected according to chemical purity, water, related sulfur compounds and other impurities that may affect reaction yield or selectivity.

A laboratory-grade specification should not automatically be treated as suitable for commercial gas odorization.

Packaging and Transportation

Due to its volatility and flammability, Ethyl Mercaptan must be supplied in approved, tightly closed containers designed for the specified quantity and transport mode.

Packaging may include suitable cylinders, pressure-rated containers or other authorized systems. Exact options depend on order quantity, destination and dangerous-goods requirements.

Ethyl Mercaptan is commonly transported as UN 2363, Class 3, Packing Group I. The current SDS and applicable transport regulations must be checked before every shipment.

Storage and Safe Handling

Ethyl Mercaptan is an extremely flammable and hazardous industrial chemical. It should only be handled by trained personnel using closed equipment.

Recommended controls include:

• Store in a cool, well-ventilated designated area

• Keep containers tightly closed

• Eliminate flames, sparks and other ignition sources

• Use grounded and bonded transfer equipment

• Use explosion-protected electrical equipment where required

• Provide suitable local exhaust and vapor detection

• Prevent discharge into drains and the environment

• Maintain an odor-release and emergency-response plan

Its strong odor must not replace gas detection, exposure monitoring or engineering controls. Even a small release can create a significant odor incident over a wide area.

Review the current SDS before receiving, sampling, transferring or using the product.

Why Source Ethyl Mercaptan from AOZUN?

AOZUN supports industrial buyers sourcing Ethyl Mercaptan for LPG odorization and controlled chemical synthesis.

Available support may include:

• Grade and application review

• Specification and impurity confirmation

• Batch COA and SDS documentation

• Packaging and dangerous-goods review

• Export and destination-port coordination

• Support for recurring industrial orders

Product grade, packaging, transport route and availability are subject to confirmation in the official quotation.

Ethyl Mercaptan FAQ

Are Ethyl Mercaptan and Ethanethiol the same chemical?

Yes. Ethyl Mercaptan is the common industrial name, while Ethanethiol is the systematic chemical name. Both refer to CAS 75-08-1.

Is Ethyl Mercaptan a liquid or a gas?

It is normally described as a volatile liquid, but its boiling point is close to typical ambient temperatures. It can therefore generate large amounts of vapor if released or heated.

Is Ethyl Mercaptan used in natural gas?

It may be used in some odorant systems, but it is especially associated with propane and LPG. Natural-gas networks frequently use other mercaptans, sulfides or odorant blends.

Can smell be used as the only leak-detection method?

No. Odor provides an important warning, but it must not replace calibrated detectors, process monitoring or workplace exposure controls.

Why must Ethyl Mercaptan be handled in a closed system?

Closed handling reduces fire, inhalation, environmental and odor-release risks. Open pouring or uncontrolled sampling is inappropriate for this highly volatile material.

Request an Ethyl Mercaptan Quote

Contact AOZUN with the required grade, purity, impurity limits, quantity, packaging, destination and application. Our team will review technical requirements, transport feasibility and product availability.