1,5-Naphthalenedisulfonic acid tetrahydrate
Also known as: Armstrong's acid, Armstrong's acid tetrahydrate, Naphthalene-1,5-disulfonic acid tetrahydrate, 1,5-Disulphonaphthalene tetrahydrate, 1,5-Naphthalenedisulfonic acid hydrate, 1,5-Disulphonaphthalene tetrahydrate, Armstrong's acid tetrahydrate
1,5-Naphthalenedisulfonic acid tetrahydrate (CAS 211366-30-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H16O10S2 and a molecular weight of 360.358 g/mol. Key properties include a melting point of -7°C, a boiling point of 88-90 °C0.02 mm Hg(lit.), a density of 1.202 g/mL at 20 °C(lit.) and a flash point of 42°C. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 211366-30-2
- Jingsj CID
- J-1116016-6
- Molecular Formula
- C10H16O10S2
- Molecular Weight
- 360.358 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -7°C |
|---|---|
| Boiling Point | 88-90 °C0.02 mm Hg(lit.) |
| Density | 1.202 g/mL at 20 °C(lit.) |
| Flash Point | 42°C |
| Exact Mass | 360.018494 |
| PSA | 162.42000 |
| LogP | 3.23760 |
| Vapor Pressure | 3.79E-22mmHg at 25°C |
| Refractive Index | n20/D 1.451 |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2915900090 |
|---|---|
| Summary | 2915900090 other saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) MFN tariff:5.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 1,5-Naphthalenedisulfonic acid tetrahydrate?
The CAS number of 1,5-Naphthalenedisulfonic acid tetrahydrate is 211366-30-2.
What are the molecular formula and molecular weight of 1,5-Naphthalenedisulfonic acid tetrahydrate?
1,5-Naphthalenedisulfonic acid tetrahydrate has molecular formula C10H16O10S2 and molecular weight 360.358 g/mol.
Is 1,5-Naphthalenedisulfonic acid tetrahydrate hazardous?
1,5-Naphthalenedisulfonic acid tetrahydrate has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
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 tetrahydrate (CAS 211366-30-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1116016-6 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.