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1-Naphthylamine-7-sulfonic acid

Also known as: 1,7-Cleve's acid, 8-Amino-2-naphthalenesulfonic acid, 8-Aminonaphthalene-2-sulfonic acid, Cleve's acid-1,7, 2-Naphthalenesulfonic acid, 8-amino-

1-Naphthylamine-7-sulfonic acid (CAS 119-28-8) 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 ≥300 °C(lit.) and a density of 1.5±0.1 g/cm3. 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 Nov 3, 2026.

CAS No.
119-28-8
Jingsj CID
J-47655-1
Molecular Formula
C10H9NO3S
Molecular Weight
223.248 g/mol
Category
Organic Acids
Last updated
11/3/2026
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Physicochemical Properties

Melting Point≥300 °C(lit.)
Density1.5±0.1 g/cm3
Exact Mass223.030319
PSA88.77000
LogP0.42
Refractive Index1.713

GHS Safety & Compliance

CorrosionSignal word: Danger
  • H314 — Causes severe skin burns and eye damage

Customs & Trade Information

HS Code2921450090
Summary2921450090 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 1-Naphthylamine-7-sulfonic acid?

The CAS number of 1-Naphthylamine-7-sulfonic acid is 119-28-8.

What are the molecular formula and molecular weight of 1-Naphthylamine-7-sulfonic acid?

1-Naphthylamine-7-sulfonic acid has molecular formula C10H9NO3S and molecular weight 223.248 g/mol.

Is 1-Naphthylamine-7-sulfonic acid hazardous?

1-Naphthylamine-7-sulfonic acid has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.

What are the upstream and downstream products of 1-Naphthylamine-7-sulfonic acid?

For 1-Naphthylamine-7-sulfonic acid, Upstream Products: Naphthalene-2-sulfonic acid, Water; Downstream Products: Flavianic acid, 1-Acetamido-7-hydroxynaphthalene, 1-Amino-7-naphthol.

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-Naphthylamine-7-sulfonic acid (CAS 119-28-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47655-1 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.