NIOSH Pocket Guide to Chemical Hazards


CAS 25321-14-6


RTECS XT1300000
Synonyms & Trade Names
Dinitrotoluol, DNT, Methyldinitrobenzene [Note: Various isomers of DNT exist.]
DOT ID & Guide
1600 152 (molten)
2038 152 (solid)


NIOSH REL: Ca TWA 1.5 mg/m3 [skin] See Appendix A
OSHA PEL: TWA 1.5 mg/m3 [skin]
IDLH Ca [50 mg/m3] See: 25321146 Conversion
Physical Description
Orange-yellow crystalline solid with a characteristic odor. [Note: Often shipped molten.]
MW: 182.2
BP: 572°F
MLT: 158°F
Sol: Insoluble
VP: 1 mmHg
IP: ?

Sp.Gr: 1.32
Fl.P: 404°F
UEL: ?
LEL: ?

Combustible Solid, but difficult to ignite.
Incompatibilities & Reactivities
Strong oxidizers, caustics, metals such as tin & zinc [Note: Commercial grades will decompose at 482°F, with self-sustaining decomposition at 536°F.]
Measurement Methods
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Anoxia, cyanosis; anemia, jaundice; reproductive effects; [potential occupational carcinogen]
Target Organs Blood, liver, cardiovascular system, reproductive system

Cancer Site [in animals: liver, skin & kidney tumors]
See also: INTRODUCTION   See ICSC CARD: 0465