IUPAC Name: 2-Methylpyrazole-3-carbaldehyde
Molecular Formula: C₅H₆N₂O
Molecular Weight: 110.11 g/mol
Canonical SMILES: CN1C(=CC=N1)C=O
InChI: InChI=1S/C5H6N2O/c1-7-5(4-8)2-3-6-7/h2-4H,1H3
Product Categories: Aldehyde; Building Blocks; Pyrazole
H-Bond Acceptor: 2
Index of Refraction: 1.552 
Molar Refractivity: 30.71 cm³ 
Molar Volume: 96 cm³ 
Polarizability: 12.17×10^-24 cm³ 
Surface Tension: 42 dyne/cm 
Density: 1.14 g/cm³ 
Flash Point: 86.2 °C 
Enthalpy of Vaporization: 45.53 kJ/mol 
Boiling Point: 218.9 °C at 760 mmHg 
Vapour Pressure of 1-Methyl-1H-pyrazole-5-carbaldehyde (CAS NO.27258-33-9): 0.123 mmHg at 25 °C

 1-Methyl-1H-pyrazole-5-carbaldehyde (CAS NO.27258-33-9), its Synonyms are 1-Methyl-1H-pyrazole-5-carboxaldehyde 97% ; 1-Methyl-1H-pyrazole-5-carbaldehyde) ; 2-Methyl-2H-pyrazole-3-carbaldehyde ; 5-Formyl-1-methyl-1H-pyrazole .