3,3'-Dihydroxydiphenyl disulfide
Also known as: 3,3'-Dihydroxydiphenyl disulfide, Bis(3-hydroxyphenyl) disulfide, 3,3'-Dithiodiphenol, 3-[(3-hydroxyphenyl)disulfanyl]phenol, 3-hydroxyphenyl disulfide, Phenol, 3,3'-dithiobis-, 3,3'-Disulfanediyldiphenol, 3,3'-(Disulphanediyl)diphenol
3,3'-Dihydroxydiphenyl disulfide (CAS 21101-56-4) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C12H10O2S2 and a molecular weight of 250.337 g/mol. Key properties include a melting point of 89-93 °C(lit.), a boiling point of 437.3±30.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 212.2±23.3 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 21101-56-4
- Jingsj CID
- J-44172-5
- Molecular Formula
- C12H10O2S2
- Molecular Weight
- 250.337 g/mol
- Category
- Ethers
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 89-93 °C(lit.) |
|---|---|
| Boiling Point | 437.3±30.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 212.2±23.3 °C |
| Exact Mass | 250.012222 |
| PSA | 91.06000 |
| LogP | 3.00 |
| Vapor Pressure | 0.0±1.1 mmHg at 25°C |
| Refractive Index | 1.752 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2930909090 |
|---|---|
| Summary | 2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3,3'-Dihydroxydiphenyl disulfide?
The CAS number of 3,3'-Dihydroxydiphenyl disulfide is 21101-56-4.
What are the molecular formula and molecular weight of 3,3'-Dihydroxydiphenyl disulfide?
3,3'-Dihydroxydiphenyl disulfide has molecular formula C12H10O2S2 and molecular weight 250.337 g/mol.
Is 3,3'-Dihydroxydiphenyl disulfide hazardous?
3,3'-Dihydroxydiphenyl disulfide has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 3,3'-Dihydroxydiphenyl disulfide?
For 3,3'-Dihydroxydiphenyl disulfide, Upstream Products: 3-Hydroxybenzenethiol, 3-Aminophenol; Downstream Products: 3-Hydroxybenzenethiol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,3'-Dihydroxydiphenyl disulfide (CAS 21101-56-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44172-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.