2-Aminobenzenesulfonic acid
Also known as: Aniline-2-sulfonic acid, Orthanilic acid, 2-Sulfoaniline, 2-aminobenzenesulphonic acid, Aniline-o-sulfonic acid, Benzenesulfonic acid, 2-amino-, 2-amino-1-benzenesulfonic acid
2-Aminobenzenesulfonic acid (CAS 88-21-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H7NO3S and a molecular weight of 173.190 g/mol. Key properties include a melting point of 300 °C, a boiling point of 363ºC and a density of 1.5±0.1 g/cm3. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 88-21-1
- Jingsj CID
- J-1993679-9
- Molecular Formula
- C6H7NO3S
- Molecular Weight
- 173.190 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 300 °C |
|---|---|
| Boiling Point | 363ºC |
| Density | 1.5±0.1 g/cm3 |
| Exact Mass | 173.014664 |
| PSA | 88.77000 |
| LogP | 0.09 |
| Refractive Index | 1.630 |
| Additional Property | sparingly soluble |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2921420090 |
|---|---|
| Summary | HS:2921420090 aniline derivatives and their salts VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2-Aminobenzenesulfonic acid?
The CAS number of 2-Aminobenzenesulfonic acid is 88-21-1.
What are the molecular formula and molecular weight of 2-Aminobenzenesulfonic acid?
2-Aminobenzenesulfonic acid has molecular formula C6H7NO3S and molecular weight 173.190 g/mol.
Is 2-Aminobenzenesulfonic acid hazardous?
2-Aminobenzenesulfonic acid has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of 2-Aminobenzenesulfonic acid?
For 2-Aminobenzenesulfonic acid, Upstream Products: Thioindigo, Benzothiazole, N-Phenylhydroxylamine; Downstream Products: 2-Aminobenzenesulfonyl chloride, 1,2-Benzenedisulfonic acid, dipotassium salt, 2-Iodobenzenesulfonyl chloride.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Aminobenzenesulfonic acid (CAS 88-21-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993679-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.