3,3′-Dihydroxydiphenyl disulfide
3,3′-Dihydroxydiphenyl disulfide (CAS 21101-56-4) is a sulfur-containing organic compound with a molecular weight of 250.34. This chemical serves as a valuable building block in organic synthesis, particularly for the construction of more complex molecules. Its structure, featuring disulfide and hydroxyl functionalities, allows for diverse chemical transformations. Primarily utilised in chemical research and development, it is a key intermediate for synthesising novel organic compounds and materials.
- Synonyms
- S2(C6H4OH)2

Organic Synthesis Intermediate
Utilised as a precursor in the synthesis of various organic compounds, leveraging its disulfide and hydroxyl groups for further chemical modifications. It plays a role in creating more complex molecular architectures.
Research and Development
Employed in laboratory settings for exploratory chemistry and the development of new synthetic methodologies. Its unique structural features make it a useful reagent for academic and industrial research.
Material Science
Can be investigated for its potential incorporation into novel materials, such as polymers or functional coatings, where its sulfur and hydroxyl functionalities might impart specific properties.
| Molecular weight | 250.34 |
|---|---|
| Linear formula | S2(C6H4OH)2 |
| Assay | 97% |
| Melting point | 89-93 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 3,3′-Dihydroxydiphenyl disulfide used for?
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3,3′-Dihydroxydiphenyl disulfide is primarily used as a building block in organic synthesis and in research and development for creating new organic compounds and materials.
What is the CAS number and formula for 3,3′-Dihydroxydiphenyl disulfide?
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The CAS number is 21101-56-4 and the linear formula is S₂ (C₆H₄OH)₂. The molecular weight is 250.34 g/mol.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3,3′-Dihydroxydiphenyl disulfide with an assay of 97%. This product is not intended for pharmaceutical, food, or any other specific regulated use unless explicitly stated.
How should 3,3′-Dihydroxydiphenyl disulfide be handled?
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Handling requires appropriate personal protective equipment including a dust mask type N95 (US), eyeshields, and gloves. Avoid breathing dust. In case of contact with eyes, rinse cautiously with water for several minutes and seek medical advice. This compound is classified as an irritant.
How is 3,3′-Dihydroxydiphenyl disulfide packed and shipped?
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3,3′-Dihydroxydiphenyl disulfide is carefully packed to ensure safe transit and is exported globally by Tech Serve Solutions in compliance with all relevant shipping regulations.
How can I request a sample or quote for 3,3′-Dihydroxydiphenyl disulfide?
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To request a sample or a quotation, please use the contact form on the Tech Serve Solutions website or contact our sales department directly with your requirements.
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