IUPAC Name: 2H-Tetrazol-5-amine
Molecular Formula: CH₃N₅
Molecular Weight: 85.06802 g/mol
Appearance: white crystal
Density: 1.711 g/cm³
Melting Point: 201-205 °C(lit.)
Boiling Point: 360.4 °C at 760 mmHg 
Flash Point: 199.1 °C
Index of Refraction: 1.699
Molar Refractivity: 19.19 cm³
Molar Volume: 49.7 cm³
Surface Tension: 154.1 dyne/cm 
Enthalpy of Vaporization: 60.61 kJ/mol
Vapour Pressure: 2.23E-05 mmHg at 25 °C
XLogP3-AA: -0.9
H-Bond Donor: 2
H-Bond Acceptor: 4 
Tautomer Count: 4
Exact Mass: 85.038845
MonoIsotopic Mass: 85.038845
Topological Polar Surface Area: 80.5
Heavy Atom Count: 6 
Canonical SMILES: C1(=NNN=N1)N
InChI: InChI=1S/CH3N5/c2-1-3-5-6-4-1/h(H3,2,3,4,5,6)
InChIKey: ULRPISSMEBPJLN-UHFFFAOYSA-N
EINECS: 224-581-7
Product Categories: Miscellaneous; pharmacetical; Building Blocks; Heterocyclic Building Blocks; Tetrazoles

 5-Aminotetrazole(CAS NO.4418-61-5) is used as intermediate in organic synthesis.

Reported in EPA TSCA Inventory.

Hazard Codes: Xn, F, Xi
Risk Statements: 22-36/37/38-20/21/22-11 
R22:Harmful if swallowed. 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed. 
R11:Highly flammable.
Safety Statements: 26-36/37-36-16-7/9 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37:Wear suitable protective clothing and gloves. 
S36:Wear suitable protective clothing. 
S16:Keep away from sources of ignition. 
S7:Keep container tightly closed. 
S9:Keep container in a well-ventilated place.
RIDADR: 1325
WGK Germany: 3
RTECS: XF7465000
Hazard Note: Flammable/Irritant
HazardClass: 4.1
PackingGroup: III
Moderately toxic by intraperitoneal route. An unstable material; explodes with KOH. When heated to decomposition it emits toxic fumes of NO_x.

 5-Aminotetrazole(CAS NO.4418-61-5) is also named as 1H-Tetrazol-5-amine ; 5-Amino-1,2,3,4-tetrazole ; 5-Aminotetrazole ; 5-Aminotetrazole ; AI3-23021 ; NSC 3004 ; 1H-Tetrazole, 5-amino- ; 2H-Tetrazol-5-amine ; Tetrazol-5-ylamine . Aminotetrazole (CAS NO.4418-61-5) is flammable. It will produce toxic nitrogen oxide fumes by high heat. So the
storage environment should be ventilate, low-temperature and dry. Keep Aminotetrazole (CAS NO.4418-61-5) separate from potassium hydroxide.