Melting point :13°C
Boiling point :99-100 °C6 mm Hg(lit.)
Density :0.993 g/mL at 25 °C(lit.)
vapor pressure :7.136-87.85Pa at 20-50℃
refractive index :n20/D 1.495(lit.)
Flash point :205 °F
storage temp. :Keep in dark place,Sealed in dry,Room Temperature
solubility :soluble
form :Liquid After Melting
pka :14.95±0.50(Predicted)
Specific Gravity :0.993
color :Clear colorless to yellow
Water Solubility :soluble
Sensitive :Hygroscopic
Merck :14,4226
BRN :105204
LogP :1.097 (est)
CAS DataBase Reference :7554-65-6(CAS DataBase Reference)
NIST Chemistry Reference :4-methylpyrazole(7554-65-6)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.