Ethanethiol supplier: high-quality ethyl mercaptan from Qingdao Zhongshitiancheng.

Tetrahydrothiophene (THT): High-Quality Gas Odorant & Core Fine Chemical Raw Material Tetrahydrothiophene (abbreviated as THT, CAS: 110-01-0) is a chemically stable and highly safe sulfur-containing fine chemical intermediate. It is currently the most recognized and widely used high-efficiency gas odorant in the global gas industry. Featuring distinctive odor perception, stable chemical properties, non-corrosiveness and no olfactory fatigue, THT is extensively applied in leakage warning for natural gas, coal gas and liquefied petroleum gas. It also serves as a key raw material in pharmaceutical synthesis, pesticide manufacturing and electrochemical solvents, playing an indispensable role in industrial production and gas safety systems.​

1. Basic Physical & Chemical Properties

Tetrahydrothiophene has a molecular formula of C₄H₈S and a molecular weight of 88.17. At room temperature, it appears as a colorless and transparent oily liquid without suspended impurities. All technical indicators comply with national industry standards and ISO international specifications, ensuring high adaptability for various industrial applications.

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Appearance: Colorless transparent liquid with high purity, uniform color, no turbidity and no precipitation

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Melting & Boiling Point: Boiling point 119–121℃, melting point -96.2℃; stable storage performance under normal temperature with wide temperature adaptability

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Density: Approximately 0.9987 g/cm³ at 20℃; insoluble in water and easily soluble in organic solvents

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Odor Characteristics: Possesses a strong and highly recognizable characteristic odor. Trace concentration as low as 0.01 ppm in the air can be easily detected by human smell, ensuring ultra-sensitive leakage warning​

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Stability: Excellent chemical stability; non-volatile and non-decomposable at room temperature with high temperature resistance and long-term storage stability​

2. Core Product Advantages

Compared with traditional gas odorants such as ethyl mercaptan, tetrahydrothiophene effectively solves common pain points including performance failure, equipment corrosion and olfactory fatigue, making it the preferred choice for modern gas safety systems.

2.1 Ultra-High Warning Sensitivity Without Olfactory Fatigue

THT delivers a pure and distinct odor. The human sense of smell will not develop tolerance or fatigue to it. Micro gas leakage can be accurately detected at ultra-low concentration, eliminating hidden dangers caused by undetectable gas leakage and fully protecting residential and industrial gas safety.

2.2 Non-Corrosive & Wide Compatibility

With mild chemical properties, THT causes no corrosion to metal pipelines, valves, gaskets and gas equipment. It is fully compatible with municipal gas pipelines, industrial gas supply systems and household gas appliances, greatly reducing equipment aging, leakage risks and maintenance costs.

2.3 Stable Performance & Long Service Life

THT features high temperature resistance, oxidation resistance and anti-decomposition performance. It maintains stable odor effectiveness under complex working conditions such as high pressure, normal temperature and low temperature during gas transmission. No attenuation or failure occurs during transportation, realizing long-term and stable warning effects for all-weather and all-region gas supply systems.

2.4 Environmentally Friendly & Fully Compliant

It produces fewer pollutants after combustion with no harmful residues. It conforms to national gas safety regulations and ISO 13734 international gas odorization standards. Low in toxicity and harmless, it can be safely used in civil, commercial and industrial scenarios as an eco-friendly chemical material.

3. Wide Application Fields

As a high-performance fine chemical intermediate, THT covers multiple industries including gas supply, pharmaceuticals, pesticides and electrochemistry with high application value.

3.1 Gas Odorization (Main Application)

It is widely used for odorization treatment of colorless, odorless and flammable fuel gases such as urban natural gas, manufactured gas, liquefied petroleum gas and coalbed methane. Trace addition of THT enables instant leakage warning, serving as an essential safety material for municipal gas projects, gas enterprises and industrial park gas supply systems.

3.2 Pharmaceutical & Pesticide Synthesis Intermediate

As a core synthetic building block of thiophene ring systems, THT is applied in the preparation of anticoagulant, anti-inflammatory and antibacterial pharmaceutical raw materials. It also acts as a key skeleton material for sulfur-containing pesticides such as nematicides and fungicides. Its high purity meets the high-end synthesis requirements of fine pharmaceutical and pesticide production.

3.3 Industrial Solvent & Electrochemical Material

As a special aprotic sulfur-containing solvent, it can efficiently dissolve sulfur, selenium and various organometallic complexes, suitable for fine chemical synthesis and material preparation processes. It is also applied in electrochemical fields such as lithium batteries to support the research and production of new energy storage materials.

3.4 Deep Processing Raw Material for Fine Chemicals

It serves as a precursor raw material for high-end fine chemicals such as 1,4-butanedithiol, widely used in deep processing of thiol products and supporting the coating, additive and new material industries.​

4. Product Quality & Safety Guarantee​

Our supplied tetrahydrothiophene is produced and refined with high-purity raw materials under strict full-process quality control. The product purity reaches above 99.9% with stable performance. Each batch is delivered with complete test reports and fully complies with national and industrial standards.​

For storage and transportation, THT is sealed in standard barrels and stable for long-term preservation in cool and shaded environments. We provide complete safety data sheets (SDS) and professional technical guidance. Standardized operation ensures high safety, meeting the demands of bulk procurement, engineering supporting and scientific research experiments.

5. Summary

As an invisible guardian of gas safety and a core intermediate of high-end fine chemicals, tetrahydrothiophene has completely replaced traditional low-efficiency odorants with its core advantages of high sensitivity, non-corrosiveness, superior stability and high safety. With the continuous upgrading of gas safety systems and the development of fine chemical industry, THT will keep expanding its application scenarios and maintain high market value in multiple industrial fields.

Our company specializes in the R&D and supply of high-purity tetrahydrothiophene with sufficient spot inventory, complete specifications and reliable quality. We provide customized supply, professional technical consultation and comprehensive after-sales services. Welcome enterprises from all industries to negotiate cooperation!