1,3,5-Trithiane
1,3,5-Trithiane (CAS: 291-21-4) is a heterocyclic organic compound with the molecular formula C3H6S3 and a molecular weight of 138.27 g/mol. This trimer of thioformaldehyde serves as a valuable building block in organic synthesis. It is primarily employed as a reagent in chemical synthesis, particularly for introducing sulfur-containing functionalities into organic molecules. Its reliable performance makes it a key component in various research and development applications.
- IUPAC
- sym.-Trithiane,Thioformaldehyde trimer
- Synonyms
- sym.-TrithianeThioformaldehyde trimer

Organic Synthesis Reagent
1,3,5-Trithiane is utilized as a precursor and building block in the synthesis of complex organic molecules. It facilitates the introduction of thioether functionalities, which are prevalent in pharmaceuticals and materials science.
Heterocyclic Chemistry
As a sulfur-containing heterocyclic compound, it is a subject of study and application in heterocyclic chemistry research. Its unique structure allows for diverse chemical transformations and the creation of novel heterocyclic systems.
Specialty Chemical Intermediate
It functions as an intermediate in the production of specialty chemicals. Its reactivity can be leveraged to build larger molecular structures with specific desired properties for advanced applications.
| Molecular weight | 138.27 |
|---|---|
| Empirical formula | C3H6S3 |
| Assay | 97% |
| Melting point | 215-220 °C (dec.)(lit.) |

Hazard statements
- H319Causes serious eye irritation
Precautionary statements
- P305IF IN EYES
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1,3,5-Trithiane used for?
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1,3,5-Trithiane is primarily used as a building block and reagent in organic synthesis, particularly in heterocyclic chemistry and for introducing sulfur-containing groups into molecules.
What are the CAS number and formula for 1,3,5-Trithiane?
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The CAS number for 1,3,5-Trithiane is 291-21-4, and its empirical formula is C3H6S3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,3,5-Trithiane with an assay of 97%. We do not represent this product as meeting USP, BP, or EP pharmacopoeial standards.
How should 1,3,5-Trithiane be handled safely?
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1,3,5-Trithiane is classified as a Warning substance with H319 (Causes serious eye irritation). Handle with safety eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended. Ensure adequate ventilation and avoid contact with eyes.
Is 1,3,5-Trithiane a controlled substance?
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The provided data does not indicate that 1,3,5-Trithiane is a controlled substance.
How is 1,3,5-Trithiane packed, shipped, and exported?
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1,3,5-Trithiane is carefully packed according to industry standards to ensure safe transit and is exported globally by Tech Serve Solutions.
How can I request a sample or quote for 1,3,5-Trithiane?
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To request a sample or a quote for 1,3,5-Trithiane, please contact our sales department through the website or by phone.
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