Agent Name

1,2-Benzenedicarbonitrile

Alternative Name

o-Phthalodinitrile

CAS Number

91-15-6

Formula

C8-H4-N2

Major Category

Nitrogen Compounds

Synonyms

o-Phthalodinitrile; 1,2-Benzendikarbonitril [Czech]; 1,2-Benzodinitrile; 1,2-Dicyanobenzene; Ftalodinitril [Czech]; Ftalonitril [Czech]; Phthalic acid dinitrile; Phthalodinitrile; o-Benzenedicarbonitrile; o-Benzenedinitrile; o-Cyanobenzonitrile; o-Dicyanobenzene; o-Pdn; o-Phthalodinitrile; ortho-Dicyanobenzene; [ChemIDplus] UN3439

Category

Nitriles

Description

Beige solid; [Hawley] Off-white or beige powder; [MSDSonline]

Sources/Uses

Used as an intermediate mainly for the production of phthalocyanine dyes; Also used in sintering metals; [ACGIH]

Comments

Inhalation of high concentrations may cause CNS effects; [ICSC] Emergency treatment: "Benzyl cyanide"; [HSDB] Lethal doses cause tremor and convulsions in rats; [RTECS] TLV Basis = convulsions and decreased body weight; Unlike the aliphatic nitriles, aromatic nitriles such as m-phthalodinitrile do not liberate cyanide in the body. [ACGIH] An acute neurotoxin; Not irritating to skin or eyes; [Reference #1] See "m-Phthalodinitrile." See "NITRILES."

Reference Link

OECD SIDS: o-Phthalodinitrile - 2001

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

TLV (ACGIH)

1 mg/m3, Inhalable fraction and vapor

Vapor Pressure

0.00569 mm Hg

Explanatory Notes

Flash point = 162 deg C; [CHEMINFO] The Guide in the Emergency Response Guidebook is for "Nitriles, toxic, solid, n.o.s."

Adverse Effects
Neurotoxin

Other CNS Neurotoxin

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure: