Product Overview
Tetrahydrothiophene CAS 110-01-0 (THT) is a cyclic organosulfur compound characterized by its distinctive, unpleasant odor often described as resembling that of natural gas or sulfur. As a widely used gas odorant, tetrahydrothiophene serves as a critical safety additive, providing a recognizable smell to otherwise odorless fuel gases to enable leak detection. In addition to its primary role as an odorant, this versatile chemical also finds applications as an intermediate in organic synthesis and as a solvent in various industrial processes. The reliable and controlled use of Tetrahydrothiophene CAS 110-01-0 is essential for ensuring public safety and supporting specialized chemical manufacturing.
Basic Information
| CAS No. | 110-01-0 |
| UN No. | UN2412 (Tetrahydrothiophene) |
| Molecular Formula | C₄H₈S |
| Hazard Classification | 3 (Flammable liquid) |
Key Attributes & Parameters
| Purity | Typically ≥98.5% for industrial odorant use; higher purity grades (≥99.5%) are available for chemical synthesis. |
| Physical State | Colorless to pale yellow, flammable liquid with a characteristic strong, foul odor. |
| Boiling Point | 119-121 °C (246-250 °F) |
| Flash Point | 18 °C (64 °F) (closed cup) |
| Odor Threshold | Very low (in the parts per billion range), making it highly effective as a warning agent. |
| Solubility | Slightly soluble in water; miscible with most organic solvents like ethanol, ether, and benzene. |
Features & Advantages
Highly Effective and Recognizable Odor
The strong, characteristic odor of tetrahydrothiophene is easily detectable at very low concentrations, making it an excellent and widely recognized warning agent for gas leaks.
Chemical Stability and Low Reactivity
Compared to some other sulfur-containing odorants (e.g., mercaptans), THT is relatively stable and less reactive, leading to lower oxidative losses in gas distribution systems and providing longer-lasting odorization.
Favorable Physical Properties
Its moderate boiling point and liquid state at ambient temperatures facilitate easy handling, storage, and controlled injection into gas streams.
Versatile Intermediate
The sulfur atom in its saturated ring structure makes it a useful building block or solvent in certain organic synthesis reactions within the pharmaceutical and chemical industries.
Functional Characteristics
As a gas odorant, the primary function of tetrahydrothiophene is to impart a detectable and persistent odor. It is typically injected into natural gas, liquefied petroleum gas (LPG), or other fuel gases in minute, precisely controlled quantities (typically a few milligrams per cubic meter of gas). Its chemical stability ensures the odor persists through the distribution network until it reaches the end user. In chemical applications, it acts as a polar aprotic solvent or reacts as a sulfur-containing intermediate.
Primary Application Fields
Gas Odorization (Primary Use)
The dominant global application is as an additive to odorize natural gas, town gas, and LPG for safety and leak detection purposes.
Chemical Synthesis
Used as a starting material or intermediate in the synthesis of certain pharmaceuticals, pesticides, and other specialty chemicals.
Solvent Applications
Serves as a specialized solvent in some chemical reactions and extraction processes due to its solvating properties.
Analytical Chemistry
Occasionally used as a standard or reagent in chromatographic analysis and sulfur chemistry research.
Customer Collaboration Case
A regional natural gas utility facing challenges with odorant fade in their extensive pipeline network partnered with us to improve their safety protocol. Their previous odorant was breaking down in certain sections of the older system, compromising leak detection reliability. We proposed switching to a stabilized formulation based on high-purity Tetrahydrothiophene CAS 110-01-0. We conducted a pilot program, analyzing system conditions and customizing an injection protocol. The superior chemical stability of tetrahydrothiophene resulted in consistent and persistent odor intensity throughout the network, even in areas with older infrastructure. Post-implementation monitoring confirmed reliable odor levels at all checkpoints. This successful collaboration enhanced the utility's safety compliance, reduced customer odor-related calls, and provided a more robust and dependable warning system, showcasing the critical role of selecting the right tetrahydrothiophene-based odorant for long-distance gas distribution.
Heze Dongjian Chemical Sales Co., Ltd. relies on its rich product range and professional technical support to provide customers with comprehensive chemical service solutions. The products cover three core categories: special gases (such as carbon monoxide, propargene), LNG refrigerants, and bulk materials (such as ethylene, isopentane), as well as various other products such as lubricants and new energy power equipment, meeting the needs of different industries. The company not only provides product sales and transportation services, but also forms a professional technical team to carry out research and development of biological chemical products, technical consultation, and technology transfer services, adhering to the service concept of "learning for application, application-oriented". Through precise product quotations, professional technical guidance, and efficient delivery services, it forms a full-chain service model of "products + services + technology", providing customers with one-stop chemical services, helping them reduce costs, increase efficiency, and enhance competitiveness.
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