Melting point :83-84 °C (lit.)
Boiling point :167 °C/0.8 mmHg (lit.)
Density :0.9902 (rough estimate)
refractive index :1.4690 (estimate)
storage temp. :-20°C
solubility :DMSO: 20 mg/ml; Ethanol: 10 mg/ml; PBS (pH 7.2): 10 mg/ml
pka :6.04(at 25℃)
form :Solid
color :White to light yellow
Water Solubility :Soluble in water, alcohol, and hot chloroform.
Merck :13,4739
BRN :2012
Stability :Hygroscopic
InChIKey :NTYJJOPFIAHURM-UHFFFAOYSA-N
LogP :-0.700
CAS DataBase Reference :51-45-6(CAS DataBase Reference)
NIST Chemistry Reference :Histamine(51-45-6)
EPA Substance Registry System :Histamine (51-45-6)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P280 Wear protective gloves/protective clothing/eye protection/face protection. 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.