Agent Name

m-Nitrotoluene

Alternative Name

3-Nitrotoluene

CAS Number

99-08-1

Formula

C7-H7-N-O2

Major Category

Nitrogen Compounds

Synonyms

1-Methyl-3-nitrobenzene; 3-Methylnitrobenzene; 3-Nitrotoluene; 3-Nitrotoluol; Nitrotoluene, all isomers; Toluene, m-nitro-; m-Methylnitrobenzene; m-Nitrotoluene; m-Nitrotoluol; meta-Nitrotoluol; [ChemIDplus] UN1664

Category

Nitros, Aromatic

Description

Yellow liquid with a weak, aromatic odor. [Note: A solid below 59 degrees F.]; [NIOSH]

Sources/Uses

The meta isomer is not commercially significant; [ACGIH]

Comments

Nitrotoluenes (all isomers) have the potential to induce methemoglobinemia in the same manner as aniline and nitrobenzene. [ACGIH] Can induce methemoglobinemia; A mild skin and eye irritant; [ICSC]

Exposure Assessment
BEI

Methemoglobin in blood = 1.5% of hemoglobin during or at end of shift. [ACGIH]

Skin Designation (ACGIH)

Yes

TLV (ACGIH)

2 ppm

PEL (OSHA)

5 ppm

IDLH (NIOSH)

200 ppm

Excerpts from Documentation for IDLHs

Basis for revised IDLH: Based on acute oral toxicity data in animals [Back et al. 1972; Vasilerko et al. 1978] and an analogy to nitrobenzene [Linch 1974] which has an IDLH of 200 ppm, the original IDLH for nitrotoluene (200 ppm) is not being revised at this time.

Vapor Pressure

0.1 mm Hg

Odor Threshold Low

0.05 ppm

Lethal Concentration

LC50 (rat) = 693 mg/m3

Explanatory Notes

Odor threshold from "Quick Guide: The Electronic NIOSH Pocket Guide to Chemical Hazards"; Flash point = 106 deg C;

Adverse Effects
Methemoglobinemia

Methemoglobinemia, Primary

IARC Carcinogen

Not Classifiable

Links to Other NLM Databases
Health Studies

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Toxicity Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: