NIOSH Pocket Guide to Chemical Hazards

Amitrole CAS 61-82-5
C2H4N4 RTECS XZ3850000
Synonyms & Trade Names
Aminotriazole; 3-Aminotriazole; 2-Amino-1,3,4-triazole; 3-Amino-1,2,4-triazole
DOT ID & Guide
NIOSH REL: Ca TWA 0.2 mg/m3 See Appendix A
OSHA PEL†: none
IDLH Ca [N.D.] Conversion
Physical Description
Colorless to white, crystalline powder. [herbicide] [Note: Odorless when pure.]
MW: 84.1
BP: ?
MLT: 318°F
Sol(77°F): 28%
VP: <0.000008 mmHg
IP: ?

Sp.Gr: 1.14
Fl.P: NA

Noncombustible Solid, but may be dissolved in flammable liquids.
Incompatibilities & Reactivities
Light (decomposes), strong oxidizers [Note: Corrosive to iron, aluminum & copper.]
Measurement Methods
NIOSH 0500; OSHA PV2006
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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
Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin; dyspnea (breathing difficulty), muscle spasms, ataxia, anorexia, salivation, increased body temperature; lassitude (weakness, exhaustion), skin dryness, depression (thyroid function suppression)
Target Organs Eyes, skin, thyroid

Cancer Site [in animals: liver, thyroid & pituitary gland tumors]