4-Mercaptophenol
Also known as: 4-Hydroxybenzenethiol, 4-Hydroxythiophenol, 4-Sulfanylphenol, p-Mercaptophenol, p-Hydroxythiophenol, 4-Mercaptobenzene-1-ol, 4-Sulfanylbenzenol, Phenol, 4-mercapto-
4-Mercaptophenol (CAS 637-89-8) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C6H6OS and a molecular weight of 126.176 g/mol. Key properties include a melting point of 33-35 °C(lit.), a boiling point of 256.1±23.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 108.7±22.6 °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.
- 637-89-8
- Jingsj CID
- J-1312552-5
- Molecular Formula
- C6H6OS
- Molecular Weight
- 126.176 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 33-35 °C(lit.) |
|---|---|
| Boiling Point | 256.1±23.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 108.7±22.6 °C |
| Exact Mass | 126.013931 |
| PSA | 59.03000 |
| LogP | 1.68 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.642 |
| Additional Property | soluble |
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 4-Mercaptophenol?
The CAS number of 4-Mercaptophenol is 637-89-8.
What are the molecular formula and molecular weight of 4-Mercaptophenol?
4-Mercaptophenol has molecular formula C6H6OS and molecular weight 126.176 g/mol.
Is 4-Mercaptophenol hazardous?
4-Mercaptophenol 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 4-Mercaptophenol?
For 4-Mercaptophenol, Upstream Products: Phenol, 1-Methoxy-4-(methylthio)benzene, Potassium ethylxanthate; Downstream Products: 4-(Trifluoromethylthio)phenol, 2-(4-Hydroxyphenyl)sulfanylacetic acid, N-Acetyl-4-S-cysteaminylphenol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Mercaptophenol (CAS 637-89-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1312552-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.