Agent Name

Mucochloric acid

CAS Number

87-56-9

Formula

C4-H2-Cl2-O3

Major Category

Other Classes

Synonyms

(Z)-2,3-Dichloro-4-oxo-2-butenoic acid; 2,3-Dichloro-4-oxo-2-butenoic acid; 2,3-Dichloromaleic aldehyde acid; 2,3-Dichloro-4-oxobutenoic acid; Acrylic acid, 2,3-dichloro-3-formyl-; Aldehydodichloromaleic acid; Dichloromalealdehydic acid; Kyselina mukochlorova [Czech]; alpha,beta-Dichloro-beta-formyl acrylic acid; alpha,beta-Dichloro-beta-formylacrylic acid; [ChemIDplus] MCA; [HSDB] UN2923

Category

Organic Acids

Description

Colorless to yellowish solid; [CHEMINFO] Crystalline solid; [MSDSonline]

Sources/Uses

Used to make dyes, pyridaben (acaricide), and the active ingredient in the production of a specialized herbicides; Also used as a photographic gelatin hardening agent; [HSDB]

Comments

A strong skin and eye irritant; A powerful skin sensitizer; [Merck Index] Can cause burns; May cause skin sensitization; Emergency medical treatment: acids; [HSDB] A corrosive substance that can cause injury to the skin and eyes; [CHEMINFO] Search by CAS # found no articles concerning contact dermatitis; [PubMed] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause chemical pneumonitis; [MSDSonline]

Reference Link

OECD SIDS: Mucochloric acid - 2003

Exposure Assessment
Vapor Pressure

0.001 mm Hg

Lethal Concentration

LC50 (rat) = 5,100 mg/m3/4h

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Corrosive solid, toxic, n.o.s."

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Processes

Industrial Processes with risk of exposure: