Tetrahydrothiophene

Tetrahydrothiophene (CAS 110-01-0), also known as THT and thiophane, is a saturated sulfur-containing heterocyclic compound used commercially as an odorant and corrosion inhibitor.

Where is Tetrahydrothiophene used?

• Natural gas and LPG distribution: standard gas-odorization agent, injected into pipelines at low concentrations to provide the warning odor required by safety regulations, enabling leak detection by end users
• Industrial cleaning and maintenance: sulfur-based corrosion inhibitor protecting metal surfaces exposed to aggressive process environments
• Water treatment: THT-based chemistry where controlled sulfur dosing is required to manage scaling or microbial activity in distribution systems
• Fragrance and flavor research: it is evaluated as a flavoring reference compound for characterizing sulfurous aroma profiles.

Commercial specifications

• Technical grade: purity typically 98% or higher
• Specialty grades with tighter purity thresholds for analytical and flavor research
• Clear liquid in drums and IBCs; bulk tanker quantities for pipeline odorization programs