4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid
Also known as: K Acid, 1-Amino-8-naphthol-4,6-disulfonic acid, 4-Amino-5-hydroxy-1,7-naphthalenedisulfonic acid, 1,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, 8-Amino-1-naphthol-3,5-disulfonic acid, 1-hydroxy-8-aminonaphthalene-3,5-disulphonic acid, 5-hydroxy-4-aminonaphthalene-1,7-disulphonic acid, European K-acid, MFCD00035711
4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid (CAS 130-23-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H9NO7S2 and a molecular weight of 319.311 g/mol. Key property: a density of 1.9±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 130-23-4
- Jingsj CID
- J-8249-3
- Molecular Formula
- C10H9NO7S2
- Molecular Weight
- 319.311 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Density | 1.9±0.1 g/cm3 |
|---|---|
| Exact Mass | 318.982056 |
| PSA | 171.75000 |
| LogP | -2.91 |
| Refractive Index | 1.764 |
Customs & Trade Information
| HS Code | 2922299090 |
|---|---|
| Summary | 2922299090. other amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid?
The CAS number of 4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid is 130-23-4.
What are the molecular formula and molecular weight of 4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid?
4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid has molecular formula C10H9NO7S2 and molecular weight 319.311 g/mol.
What are the upstream and downstream products of 4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid?
For 4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid, Upstream Products: 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid, 8-Aminonaphthalene-1,3,5-trisulfonic 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. "4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid (CAS 130-23-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-8249-3 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.