1,3-Dithiane
1,3-Dithiane (CAS: 505-23-7) is a versatile heterocyclic organic compound with the molecular formula C4H8S2 and a molecular weight of 120.24 g/mol. As a key building block in organic synthesis, it serves as a protected form of formaldehyde and is instrumental in forming carbon-carbon bonds. Its applications span various chemical synthesis pathways, making it valuable for researchers and industrial chemists.
- Synonyms
- C4H8S21,3-DithianEthanedithioic acid, cyclic ethylene ester

Organic Synthesis Building Block
1,3-Dithiane is widely utilised as a masked carbonyl group, particularly for aldehydes. Its ability to be deprotonated and alkylated allows for the facile formation of new carbon-carbon bonds, a fundamental transformation in organic chemistry.
Protecting Group Chemistry
The dithiane moiety effectively protects carbonyl functionalities from unwanted reactions under various conditions. It can be readily introduced and later removed, regenerating the carbonyl group when required in multi-step syntheses.
Precursor for Complex Molecules
This compound serves as a precursor for the synthesis of more complex organic molecules, including pharmaceuticals and natural products. Its reactivity profile makes it a useful starting material for constructing intricate carbon skeletons.
| Molecular weight | 120.24 |
|---|---|
| Empirical formula | C4H8S2 |
| Assay | 97% |
| Melting point | 52-54 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Flash point | 90 °C / 194 °F |
| Transport (UN / ADR) | UN 3335 |
| 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-Dithiane used for?
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1,3-Dithiane is primarily used as a versatile building block in organic synthesis, acting as a protected form of formaldehyde and facilitating carbon-carbon bond formation. It is also employed as a protecting group for carbonyl compounds.
What are the CAS number and formula for 1,3-Dithiane?
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The CAS number for 1,3-Dithiane is 505-23-7, and its empirical formula is C4H8S2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,3-Dithiane with an assay of 97%. We do not represent this product as USP, BP, or EP grade; it is supplied for research and laboratory use.
How should 1,3-Dithiane be handled safely?
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Handling 1,3-Dithiane requires appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used if necessary. It is combustible with a flash point of 90°C (194°F) and has a WGK Germany rating of 3, indicating it is hazardous to water.
Is 1,3-Dithiane a controlled substance?
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The provided data does not indicate that 1,3-Dithiane is a controlled substance.
How is 1,3-Dithiane packed, shipped, and exported?
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1,3-Dithiane is carefully packed to ensure safe transit and is exported globally by Tech Serve Solutions, adhering to all relevant shipping regulations for chemical compounds.
How can I request a quote or sample for 1,3-Dithiane?
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To request a quote or a sample of 1,3-Dithiane, please contact our sales team through the website or by phone. Our experts will assist you promptly.
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