2-Amino-4-chloro-5-methylbenzenesulfonic acid
Also known as: 2B acid, 2-Chloro-4-toluidine-5-sulfonic acid, 2-Chloro-p-toluidine-5-sulfonic acid, 3-Chloro-4-methylaniline-6-sulfonic acid, 4-Amino-2-chlorotoluene-5-sulfonic acid, 5-amino-4-chloro-2-methylbenzenesulfonic acid, 6-Amino-4-chloro-3-toluenesulfonic acid, 6-amino-4-chloro-m-Toluenesulfonic acid, 2-Chloro-4-aminotoluene-5-sulfonic acid, 2-Chloro-paratoluidine-5-sulfonic acid, Permanent Red 2b Amine, Aminochlorotoluenesulfonic acid, Red 2B acid, MFCD00035771, EINECS 201-837-6
2-Amino-4-chloro-5-methylbenzenesulfonic acid (CAS 88-51-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H8ClNO3S and a molecular weight of 221.661 g/mol. Key properties include a melting point of 180.5ºC, a boiling point of 356ºC and a density of 1.6±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 88-51-7
- Jingsj CID
- J-1369158-3
- Molecular Formula
- C7H8ClNO3S
- Molecular Weight
- 221.661 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 180.5ºC |
|---|---|
| Boiling Point | 356ºC |
| Density | 1.6±0.1 g/cm3 |
| Exact Mass | 220.991348 |
| PSA | 88.77000 |
| LogP | 1.69 |
| Refractive Index | 1.621 |
Customs & Trade Information
| HS Code | 2921430090 |
|---|---|
| Summary | HS:2921430090 toluidines and their derivatives; salts thereof 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-Amino-4-chloro-5-methylbenzenesulfonic acid?
The CAS number of 2-Amino-4-chloro-5-methylbenzenesulfonic acid is 88-51-7.
What are the molecular formula and molecular weight of 2-Amino-4-chloro-5-methylbenzenesulfonic acid?
2-Amino-4-chloro-5-methylbenzenesulfonic acid has molecular formula C7H8ClNO3S and molecular weight 221.661 g/mol.
What are the upstream and downstream products of 2-Amino-4-chloro-5-methylbenzenesulfonic acid?
For 2-Amino-4-chloro-5-methylbenzenesulfonic acid, Upstream Products: Tetrahydrothiophene, 3-Chloro-4-methylaniline; Downstream Products: 3-Chloro-4-methylaniline, 4-[(5-chloro-4-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthoic acid, 2-amino-4-chloro-5-methylbenzenesulfonamide.
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-Amino-4-chloro-5-methylbenzenesulfonic acid (CAS 88-51-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1369158-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.