5-Amino-1,6-dihydro-7H-v-triazolo(4,5-d)pyrimidin-7-one(134-58-7) is the chemical compound with the formula C₄H₄N₆O.Its molar weight is 152.11g/mol.
5-Amino-1,6-dihydro-7H-v-triazolo(4,5-d)pyrimidin-7-one(134-58-7) is also named 2,3-Triazolo[4,5-d]pyrimidin-7-one,5-amino-1,4-dihydro-7H-1;3-triazolo(4,5-d)pyrimidin-7-one,5-amino-1,4-dihydro-7h-2;5-Amino-1,4-dihydro-7H-1,2,3-triazolo(4,5-d)pyrimidin-7-one;5-Amino-1H-triazolo[d]pyrimidin-7-ol;5-Amino-1H-v-triazolo(d)pyrimidin-7-ol;5-Amino-7-hydroxy-1H-triazolo[d]pyrimidine;5-Amino-7-hydroxy-1H-v-triazolo(d)pyrimidine.
Melting Point: >300 ^oC(lit.)
Boiling Point: 295.8 ^oC at 760 mmHg
Flash Point: 132.7 ^oC
Storage temp.: -20 ^oC
Form: lyophilized powder
Index of Refraction: 2.307 
Molar Refractivity: 33.91 cm³ 
Molar Volume: 57.4 cm³ 
Surface Tension: 181.5 dyne/cm 
Density: 2.64 g/cm³ 
Enthalpy of Vaporization: 53.55 kJ/mol 
Vapour Pressure: 0.00149 mmHg at 25 ^oC 
The chemical structure of 5-Amino-1,6-dihydro-7H-v-triazolo(4,5-d)pyrimidin-7-one(134-58-7) is
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5-Amino-1,6-dihydro-7H-v-triazolo(4,5-d)pyrimidin-7-one(134-58-7) is mainly used as medicine intermediate.

EPA Genetic Toxicology Program.

Poison by intraperitoneal route. Moderately toxic by ingestion. Mutation data reported. An experimental teratogen. Other experimental reproductive effects. When heated to decomposition it emits toxic fumes of NO_x. Inhibits protein synthesis.
Hazard Codes: Xn
Risk Statements: 22
22: Harmful if swallowed 
Safety Statements: 22-24/25
22: Do not breathe dust 
24/25: Avoid contact with skin and eyes 
WGK Germany: 3
RTECS: XZ6157000
F: 10-23 .