Sulfanilic acid
Also known as: 4-Aminobenzenesulfonic acid, p-Aminobenzenesulfonic acid, Aniline-4-sulfonic acid, p-Anilinesulfonic acid, Sulphanilic acid, 4-Sulfoaniline, p-Sulfanilic acid
Sulfanilic acid (CAS 121-57-3) 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(lit.), a boiling point of 500ºC 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 Nov 3, 2026.
- CAS No.
- 121-57-3
- Jingsj CID
- J-1336024-9
- Molecular Formula
- C6H7NO3S
- Molecular Weight
- 173.190 g/mol
- Category
- Organic Acids
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >300 °C(lit.) |
|---|---|
| Boiling Point | 500ºC |
| Density | 1.5±0.1 g/cm3 |
| Exact Mass | 173.014664 |
| PSA | 88.77000 |
| LogP | -0.51 |
| Refractive Index | 1.630 |
| Additional Property | 0.1 g/100 mL (20 ºC) |
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 Sulfanilic acid?
The CAS number of Sulfanilic acid is 121-57-3.
What are the molecular formula and molecular weight of Sulfanilic acid?
Sulfanilic acid has molecular formula C6H7NO3S and molecular weight 173.190 g/mol.
Is Sulfanilic acid hazardous?
Sulfanilic 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 Sulfanilic acid?
For Sulfanilic acid, Upstream Products: 4-Nitrobenzenesulfonic acid, Sulfadimidine, Methyl Orange; Downstream Products: Sulfaguanidine, 2,6-dimethoxybenzaldehyde, 2-Amino-5-sulfobenzoic 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. "Sulfanilic acid (CAS 121-57-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1336024-9 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.