Pyrazole

Melting point :67-70 °C (lit.)
Boiling point :186-188 °C (lit.)
Density :1.4088 (rough estimate)
vapor pressure :21Pa at 20℃
refractive index :1.4203
Flash point :186-188°C
storage temp. :Store below +30°C.
solubility :Chloroform, Methanol
form :Crystals or Crystalline Powder
pka :2.49(at 25℃)
color :White to yellow
Water Solubility :SOLUBLE
Specific Heat Capacity :Cp(crystal): 1.19 J/(g·K), at 25℃
Sensitive :Hygroscopic
Merck :14,7960
BRN :103775
InChI :1S/C3H4N2/c1-2-4-5-3-1/h1-3H,(H,4,5)
InChIKey :WTKZEGDFNFYCGP-UHFFFAOYSA-N
SMILES :c1cn[nH]c1
LogP :0.33 at 25℃
CAS DataBase Reference :288-13-1(CAS DataBase Reference)
NIST Chemistry Reference :1H-Pyrazole(288-13-1)
EPA Substance Registry System :Pyrazole (288-13-1)

Symbol(GHS):
Signal word:	Danger
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 H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, P405, P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310 H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501 H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:	P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P314 Get medical advice/attention if you feel unwell.