1,5-Naphthalenedisulfonic acid
Also known as: naphthalene-1,5-disulfonic acid, Armstrong's acid, 1,5-naphthalenedisulphonic acid, EINECS 201-317-9, MFCD00064178
1,5-Naphthalenedisulfonic acid (CAS 81-04-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H8O6S2 and a molecular weight of 288.29700 g/mol. Key property: a density of 1.704 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 81-04-9
- Jingsj CID
- J-44832-8
- Molecular Formula
- C10H8O6S2
- Molecular Weight
- 288.29700 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Density | 1.704 g/cm3 |
|---|---|
| Exact Mass | 287.97600 |
| PSA | 125.50000 |
| LogP | 3.49480 |
| Refractive Index | 1.695 |
Customs & Trade Information
| HS Code | 2904100000 |
|---|---|
| Summary | 2904100000 derivatives containing only sulpho groups, their salts and ethyl esters。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 1,5-Naphthalenedisulfonic acid?
The CAS number of 1,5-Naphthalenedisulfonic acid is 81-04-9.
What are the molecular formula and molecular weight of 1,5-Naphthalenedisulfonic acid?
1,5-Naphthalenedisulfonic acid has molecular formula C10H8O6S2 and molecular weight 288.29700 g/mol.
What are the upstream and downstream products of 1,5-Naphthalenedisulfonic acid?
For 1,5-Naphthalenedisulfonic acid, Upstream Products: Disodium 1,5-naphthalenedisulfonate, Naphthalene, 1-Naphthalenesulfonic acid; Downstream Products: Naphthalene-2,7-disulfonic acid, Naphthalene, Naphthalene-2,6-disulfonic 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. "1,5-Naphthalenedisulfonic acid (CAS 81-04-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44832-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.