Metanilic acid
Also known as: 3-Aminobenzenesulfonic acid, m-Aminobenzenesulfonic acid, 3-Sulfoaniline, Aniline-3-sulfonic acid, Benzenesulfonic acid, 3-amino-, m-Anilinesulfonic acid, Metanilate, m-Sulfanilic acid, Aniline-m-sulfonic acid
Metanilic acid (CAS 121-47-1) 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(lit.) and a density of 1.5±0.1 g/cm3. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 121-47-1
- Jingsj CID
- J-3750-3
- 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.) |
|---|---|
| Density | 1.5±0.1 g/cm3 |
| Exact Mass | 173.014664 |
| PSA | 88.77000 |
| LogP | -1.06 |
| Refractive Index | 1.630 |
| Additional Property | slightly soluble |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H312 — Harmful in contact with skin
- H332 — Harmful if inhaled
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 Metanilic acid?
The CAS number of Metanilic acid is 121-47-1.
What are the molecular formula and molecular weight of Metanilic acid?
Metanilic acid has molecular formula C6H7NO3S and molecular weight 173.190 g/mol.
Is Metanilic acid hazardous?
Metanilic acid has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H332 — Harmful if inhaled.
What are the upstream and downstream products of Metanilic acid?
For Metanilic acid, Upstream Products: Sodium 3-nitrobenzenesulfonate, 2-nitrobenzenesulfonic acid hydrate, 2-Amino-1,4-benzenedisulfonic acid; Downstream Products: 1,3-Benzenedisulfonyl dichloride, N-(3-hydroxyphenyl)benzamide, 4-[(4-Amino-5-methoxy-2-methylphenyl)azo]benzenesulfonic 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. "Metanilic acid (CAS 121-47-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3750-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.