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Chemical Sampling Information (CSI)
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General Description

Synonyms: 2,4-Dinitrotoluene; DNT

OSHA IMIS Code Number: 0990

Chemical Abstracts Service (CAS) Registry Number: 25321-14-6

Other Chemical Abstracts Service (CAS) Registry Number: 25321-14-6

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: XT1300000; 83030

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN1600 Poison (Molten) 152; UN2038 Poison (Solid, Liquid) 152

Chemical Description and Physical Properties:

orange-yellow solid (often shipped molten) with a characteristic odor
molecular weight: 182
vapor pressure: 1 mm
boiling point: 482°F
melting point: 158°F

Incompatibilities: Strong oxidizers, caustics, metals, such as tin, zinc

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 1.5 mg/m3 (skin)
Construction Industry: 1.5 mg/m3 TWA (skin)

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.2 mg/m3 TWA (Skin); Appendix A3 (Confirmed Animal Carcinogen with Unknown Relevance to Humans)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1.5 mg/m3 TWA (Skin) Potential Carcinogen

Health Factors

Potential Symptoms: Anoxia; cyanosis; anemia; jaundice; (carcinogenic)

Health Effects: Methemoglobinemia (HE13); Cumulative liver damage (HE3) Mutagen (some isomers) (HE2)

Affected Organs: Blood, liver, CVS

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: Glass Fiber Filter contained within a Tenax-GC tube
    analytical solvent: Acetone
    maximum volume: 60 Liters
    maximum flow rate: 1.0 L/min
    current analytical method: Gas Chromatography; GC/(TEA/EAP)
    method reference: 2 (OSHA 44)
    sampling and analytical error: 0.13
    method classification: Fully Validated
    note: Lab modification of sample tube consists of an 8mm Glass fiber filter disc placed inside tube ahead of first resin bed. OSHA personnel may obtain the sampling tube from the Salt Lake Technical Center. The air sampling pump must be certified by NIOSH and MSHA as safe for use in coal mines.

Bulk Method:

  • Limit the amount of bulk submitted to one gram or one mL.

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