Product Name

  • Name

    3-Nitro-1H-pyrazole

  • EINECS 640-509-0
  • CAS No. 26621-44-3
  • Article Data39
  • CAS DataBase
  • Density 1.553 g/cm3
  • Solubility
  • Melting Point 173-175 °C
  • Formula C3H3N3O2
  • Boiling Point 333.962 °C at 760 mmHg
  • Molecular Weight 113.076
  • Flash Point 155.775 °C
  • Transport Information
  • Appearance light brown powder
  • Safety 22-26-36/37/39
  • Risk Codes 22-36/37/38
  • Molecular Structure Molecular Structure of 26621-44-3 (3-Nitro-1H-pyrazole)
  • Hazard Symbols HarmfulXn
  • Synonyms Pyrazole,3-nitro- (8CI);5-Nitropyrazole;
  • PSA 74.50000
  • LogP 0.84110

3-Nitro-1H-pyrazole Chemical Properties

IUPAC Name: 5-Nitro-1H-pyrazole
Synonyms of 1H-Pyrazole, 3-nitro- (CAS NO.26621-44-3): Djw 94 ; 3-Nitropyrazole ; Djw-94
CAS NO: 26621-44-3
Molecular Formula of 1H-Pyrazole, 3-nitro- (CAS NO.26621-44-3): C3H3N3O2
Molecular Weight: 113.0748
Molecular Structure:

Melting point: 173-175 °C 
H bond acceptors: 5
H bond donors: 1
Freely Rotating Bonds: 1
Polar Surface Area: 63.64 Å2
Index of Refraction: 1.612
Molar Refractivity: 25.32 cm3
Molar Volume: 72.8 cm3
Surface Tension: 78.1 dyne/cm
Density of 1H-Pyrazole, 3-nitro- (CAS NO.26621-44-3): 1.552 g/cm3
Flash Point: 155.8 °C
Enthalpy of Vaporization: 55.4 kJ/mol
Boiling Point: 334 °C at 760 mmHg
Vapour Pressure: 0.000256 mmHg at 25°C

3-Nitro-1H-pyrazole Safety Profile

Hazard Codes: HarmfulXn 
Risk Statements: 22-36/37/38 
R22: Harmful if swallowed. 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 22-26-36/37/39 
S22: Do not breathe dust. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection.
HazardClass: IRRITANT

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