2-Amino-1-naphthalenesulfonic acid
Also known as: 2-Aminonaphthalene-1-sulfonic acid, 2-Naphthylamine-1-sulfonic acid, 2-Naphthylamine-1-sulphonic acid, Tobias acid, 1-Naphthalenesulfonic acid, 2-amino-, EINECS 201-331-5, MFCD00003988
2-Amino-1-naphthalenesulfonic acid (CAS 81-16-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H9NO3S and a molecular weight of 223.248 g/mol. Key properties include a melting point of 180ºC and a density of 1.5±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 81-16-3
- Jingsj CID
- J-1390459-1
- Molecular Formula
- C10H9NO3S
- Molecular Weight
- 223.248 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 180ºC |
|---|---|
| Density | 1.5±0.1 g/cm3 |
| Exact Mass | 223.030319 |
| PSA | 88.77000 |
| LogP | 1.32 |
| Refractive Index | 1.713 |
Customs & Trade Information
| HS Code | 2921450090 |
|---|---|
| Summary | 2921450090 1-naphthylamine (α-naphthylamine), 2-naphthylamine (β-naphthylamine) and their derivatives; salts thereof。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2-Amino-1-naphthalenesulfonic acid?
The CAS number of 2-Amino-1-naphthalenesulfonic acid is 81-16-3.
What are the molecular formula and molecular weight of 2-Amino-1-naphthalenesulfonic acid?
2-Amino-1-naphthalenesulfonic acid has molecular formula C10H9NO3S and molecular weight 223.248 g/mol.
What are the upstream and downstream products of 2-Amino-1-naphthalenesulfonic acid?
For 2-Amino-1-naphthalenesulfonic acid, Upstream Products: morpholine, 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid, 2-Naphthylamine; Downstream Products: 2-Bromonaphthalene, 6-Amino-2-naphthalenesulfonic acid, 7-Aminonaphthalene-1-sulfonic 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. "2-Amino-1-naphthalenesulfonic acid (CAS 81-16-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1390459-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.