IUPAC Name: 1,5-dimethylpyrazole-3-carboxylic acid 
Empirical Formula: C₆H₈N₂O₂
Molecular Weight: 140.1399g/mol
Structure of 1,5-Dimethylpyrazole-3-carboxylic acid (CAS NO.5744-59-2):

Index of Refraction: 1.575
Molar Refractivity: 35.98 cm³
Molar Volume: 108.7 cm³
Polarizability: 14.26×10^-24cm³
Surface Tension: 44.7 dyne/cm
Density: 1.28 g/cm³
Flash Point: 136.7 °C
Enthalpy of Vaporization: 57.3 kJ/mol 
Melting Point: 170°C
Boiling Point: 302.4 °C at 760 mmHg
Vapour Pressure: 0.000438 mmHg at 25°C 
Product Categories: Carboxylic Acids;Pyrazoles & Triazoles;Carboxylic Acids;Pyrazoles & Triazoles 
Canonical SMILES: CC1=CC(=NN1C)C(=O)O
InChI: InChI=1S/C6H8N2O2/c1-4-3-5(6(9)10)7-8(4)2/h3H,1-2H3,(H,9,10)
InChIKey: PXRXGHUTKHXUGF-UHFFFAOYSA-N

Hazard Codes: Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36/37/39-37/39
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.
Hazard Note: Irritant
HazardClass: IRRITANT

  1,5-Dimethylpyrazole-3-carboxylic acid , its cas register number is 5744-59-2. It also can be called 1H-pyrazole-3-carboxylic acid, 1,5-dimethyl- ; Pyrazole-3-carboxylic acid, 1,5-dimethyl- . 1,5-Dimethylpyrazole-3-carboxylic acid (CAS NO.5744-59-2) is irritating to eyes, respiratory system and skin. So you should wear suitable protective clothing, gloves and eye/face protection.