• Aminotriazole
  • 1,2,4-Triazol-3-ylamine
  • 3-Amino-1H-1,2,4-triazole
Formula C2H4N4
Description Colorless to white, crystalline powder, odorless when pure.
Uses Nonselective systemic herbicide. Noncropland for annual grasses, broadleaf weeds, perennial broadleaf weed, poison ivy, some aquatic weeds in marshes, drainage ditches.

Registry Numbers and Inventories.
CAS 61-82-5
EC (EINECS/ELINCS) 200-521-5
EC Index Number 613-011-00-6
EC Class Carcinogenic Category 3; Harmful; Dangerous for the Environment
EC Risk Phrase R 40 48/22 51/53
EC Safety Phrase S 36 37 61
RTECS XZ3850000
RTECS class Agricultural Chemical and Pesticide; Tumorigen; Drug; Mutagen; Reproductive Effector
UN (DOT) 2588
Merck 13,489
Beilstein/Gmelin 107687
Beilstein Reference 4-26-00-01073
EPA OPP 4401
Swiss Giftliste 1 G-1097
US TSCA Listed
Austrailia AICS Listed
New Zealand Listed
Japan ENCS (MITI) Listed

Formula C2H4N4
Formula mass 84.08
Melting point, C 149 - 152
Boiling point, C 347
Vapor pressure, mmHg 5E-5 (25 C)
Saturation Concentration 0.01 ppm at 20 C (calculated)
Density 1.138 g/cm3 (20 C)
Solubility in water Very soluble
pKa/pKb 9.40 (pKb)
Partition coefficient, pKow -0.65
Heat of vaporization 59.2 kJ/mol
Heat of combustion -1436 kJ/mol

Hazards and Protection.
Storage Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store in glass containers. Store protected from light. Store at room temperature.
Handling Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Do not breathe dust, vapor, mist, or gas. Keep container tightly closed. Do not ingest or inhale. Store protected from light.
Protection Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks Vacuum or sweep up material and place into a suitable disposal container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Disposal code 5
Stability Stable under normal temperatures and pressures. Decomposes on exposure to light.
Incompatibilities Strong oxidizing agents, acid chlorides, aluminum, copper, copper alloys, iron, acid anhydrides, iron salts.
Decomposition Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, nitrogen.

Flash Point,C 191
Autoignition, C 225
Fire fighting Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water runoff can cause environmental damage. Dike and collect water used to fight fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential Aq, nonflammable, as amitrol-t; dry powder, non-flammable, as amizol.
Hazards this compound is non-combustible.
Combustion products Fire will produce irritating, corrosive and/or toxic gases.
NFPA Health 1
  Flammability 0  
  Reactivity 0  

Exposure limit(s) TLV: ppm; 0.2 mg/m3 (as TWA) (ACGIH 1993-1994). NIOSH REL: Ca TWA 0.2 mg/m3 See Appendix A NIOSH IDLH: Potential occupational carcinogen
Carcinogin G-A3, N-2, CP65
Poison_Class 2
Exposure effects May cause cancer according to animal studies. May cause reproductive and fetal effects. Prolonged or repeated exposure may cause thyroid damage. Effects may be delayed. Laboratory experiments have resulted in mutagenic effects. Animal studies have reported the development of tumors.
   Ingestion May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause central nervous system depression. May cause thyroid abnormalities. May be harmful if swallowed.
   Inhalation Causes respiratory tract irritation. Can produce delayed pulmonary edema.
   Skin Causes skin irritation. Repeated doses may cause skin rashes
   Eyes Causes eye irritation. May cause chemical conjunctivitis.

First aid
   Ingestion If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

UN number 2588
Response guide 155
Hazard class 6.1
Packing Group I; II; III  
HS Code 2933 99 90