Agent Name

2-Naphthalenesulfonic acid

CAS Number

120-18-3

Formula

C10-H8-O3-S

Major Category

Other Classes

Synonyms

beta-Naphthalenesulfonic acid; beta-Naphthylsulfonic acid; Kyselina 2-naftalensulfonova [Czech]; Naphthalene-2-sulphonic acid; [ChemIDplus] 2-Sulfonaphthalene; [Merck Index] Naphthalene-2-sulfonic acid; [IUCLID] UN2583

Category

Naphthalenes

Description

Hygroscopic solid; [Sigma-Aldrich MSDS]

Sources/Uses

Used to make beta-naphthol and intermediates; [Merck Index] Used as a laboratory reagent, monomer in thermoplastic manufacture, intermediate for large scale chemicals, in the processing of textiles, leather, fur, and paper-pulp-paper products, and as plastifier for concrete mixtures; [ExPub: ECHA REACH Registrations]

Comments

A severe skin irritant in guinea pigs; A severe eye irritant in rabbits (causes permanent injury); Oral LD50 (rat) = 400 mg/kg; [IUCLID] May contain up to 15% sulfuric acid (CAS# 7664-93-9) as residual of manufacture; Causes burns; Inhalation may cause corrosive injuries to upper respiratory tract and lungs; Targets the teeth and cardiovascular system; "The International Agency for Research on Cancer (IARC) has determined that occupational exposure to strong-inorganic-acid mists containing sulfuric acid is carcinogenic to humans (group 1)"; [Sigma-Aldrich MSDS] See "2-Naphthalenesulfonic acid, sodium salt."

Exposure Assessment
Vapor Pressure

2.3E-8 mm Hg

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Aryl sulfonic acids, solid, with more than 5% free Sulfuric acid."

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Processes

Industrial Processes with risk of exposure: