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Chemical Sampling Information (CSI)
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General Description

Synonyms: ortho-Nitrotoluene; o-Nitrotoluol; meta-Nitrotoluene; m-Nitrotoluol; para-Nitrotoluene; p-Nitrotoluol

OSHA IMIS Code Number: 1945

Chemical Abstracts Service (CAS) Registry Number: 99-08-1

Other Chemical Abstracts Service (CAS) Registry Numbers: 88-72-2; 99-99-0

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: XT3150000; 83053; XT2975000; 83052; XT3325000; 83054

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN1664 152 Poison

Chemical Description and Physical Properties:

ortho/meta: yellow liquid or solid, weak, aromatic odor
para: pale yellow solid; weak, aromatic odor
molecular weight: 137
vapor pressure: 0.15/0.15/0.12 mm
boiling point: 432/450/460°F
melting point: 25/61/126°F

Incompatibilities: Strong oxidizers, sulfuric acid

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 5 ppm, 30 mg/m3 (Skin)

Construction Industry: 5 ppm, 30 mg/m3 TWA (Skin)

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 2 ppm, 11 mg/m3 TWA (Skin)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 2 ppm TWA (Skin)

Health Factors

Potential Symptoms: Anoxia; cyanosis; headaches; weakness, dizziness; ataxia; dyspnea, tachycardia; nausea, vomiting

Health Effects: Hematologic (Blood) Disturbances---Methemoglobinemia (HE13) Skin sensitization (HE3)

Affected Organs: Blood, CNS, CVS, skin, GI tract

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Silica Gel Tube (150/75 mg sections, 20/40 mesh)
    analytical solvent: Methanol
    maximum volume: 30 Liters
    maximum flow rate: 0.2 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 1 (NIOSH 2005 [38 KB PDF, 5 pages])
    sampling and analytical error: 0.10
    method classification: Fully Validated

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range: 1.8 ppm @ 11.8 um
    class: Mfg

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