4-Mercaptophenylacetic acid
Also known as: (4-mercaptophenyl)acetic acid, 2-(4-mercaptophenyl)acetic acid, 2-(4-sulfanylphenyl)acetic acid, Benzeneacetic acid, 4-mercapto-, p-Mercaptophenylacetic acid, 4-Mercaptobenzeneacetic acid, 4-Mercaptophenylacetic acid (MPAA), MPAA, 4-Mercaptobenzeneacetate
4-Mercaptophenylacetic acid (CAS 39161-84-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H8O2S and a molecular weight of 168.21300 g/mol. Key properties include a melting point of 105-109ºC(lit.), a boiling point of 336ºC at 760mmHg, a density of 1.299g/cm3 and a flash point of 157ºC. It is classified under GHS with signal word Danger and hazard statements H315 — Causes skin irritation, H318 — Causes serious eye damage and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 39161-84-7
- Jingsj CID
- J-17861-0
- Molecular Formula
- C8H8O2S
- Molecular Weight
- 168.21300 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 105-109ºC(lit.) |
|---|---|
| Boiling Point | 336ºC at 760mmHg |
| Density | 1.299g/cm3 |
| Flash Point | 157ºC |
| Exact Mass | 168.02500 |
| PSA | 76.10000 |
| LogP | 1.60240 |
| Refractive Index | 1.62 |
| Additional Property | Slightly soluble in water. Soluble in Dichloromethane, Ethanol and Methanol |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H318 — Causes serious eye damage
- 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-Mercaptophenylacetic acid?
The CAS number of 4-Mercaptophenylacetic acid is 39161-84-7.
What are the molecular formula and molecular weight of 4-Mercaptophenylacetic acid?
4-Mercaptophenylacetic acid has molecular formula C8H8O2S and molecular weight 168.21300 g/mol.
Is 4-Mercaptophenylacetic acid hazardous?
4-Mercaptophenylacetic acid has GHS signal word Danger and hazard statements H315 — Causes skin irritation; H318 — Causes serious eye damage; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 4-Mercaptophenylacetic acid?
For 4-Mercaptophenylacetic acid, Upstream Products: (4-Aminophenyl)acetic acid, Methyl 4-hydroxyphenylacetate; Downstream Products: [4-(Ethylsulfonyl)phenyl]acetic acid.
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-Mercaptophenylacetic acid (CAS 39161-84-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-17861-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.