Molecular Formula: C₁₂H₁₆N₃O₃PS
Molecular Weight: 313.34
EINECS: 245-986-5
Density: 1.247
Melting Point: 0-5°C
Boiling Point: 417.6°C at 760mmHg
Flash Point: 206.3°C
Storage temp: APPROX 4°C 
Water Solubility: 30-40 mg/L at 20°C
Properties: Light-brown or yellowish oil
IUPAC Name: diethoxy-[(1-phenyl-1,2,4-triazol-3-yl)oxy]-sulfanylidene-$l^{5}-phosphane 
Synonyms: Diethyl o-(1-phenyl-1h-1,2,4-triazol-3-yl) phosphorothioate ; Fulstop ; Hostathion ; O,Odiethyl o-1-phenyl-1h-1,2,4-triazol-3-yl phophorothioate ; O,O-diethyl o-(1-phenyl-1h-1,2,4-triazol-3-yl) phosphorothioate ; Phenyl-1,2,4-triazolyl-3-(O,O-diethyl thionophosphate) 
Product Categories: INSECTICIDE;NematicidesPesticides&Metabolites;AcaricidesPesticides&Metabolites;Alpha sort;Pesticides;Pesticides&Metabolites;Q-ZAlphabetic;TP - TZ 

It is a broad spectrum insecticide and acaricide with some nematicidal properties. It controls aphids on cereals and fruit

EPA Extremely Hazardous Substances List.

Poison by ingestion, inhalation and intraperitoneal routes. Moderately toxic by skin contact. When heated to decomposition it emits very toxic fumes of NO_x, PO_x, and SO_x. A pesticide.
Hazard Codes: NT
Risk Statements: 21-23/25-50/53-38-10 
R21: Harmful in contact with skin
R23/25: Toxic by inhalation and if swallowed
R50/53: Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
R38: Irritating to skin
R10: Flammable
Safety Statements: 1/2-36/37-45-60-61 
S1/2: Keep locked up and out of the reach of children
S36/37: Wear suitable protective clothing and gloves
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S60: This material and its container must be disposed of as hazardous waste
S61: Avoid release to the environment. Refer to special instructions / safety data sheets
RIDADR: 3018
HazardClass: 6.1(a)
PackingGroup: II

Triazophos's Handling and Storage 
【Storage】Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
【Handling】All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.