Melting point :64 °C
Density :1.9 g/mL at 25 °C(lit.)
vapor pressure :14.6 mm Hg ( 25 °C)
storage temp. :2-8°C
solubility :Slowly but freely soluble in water, very soluble in boiling water, practically insoluble in ethanol (96 per cent).
form :solid
PH :3.0-4.0 (20℃, 5%)
Merck :13,4091
Dielectric constant :32.4（Ambient）
CAS DataBase Reference :13463-43-9(CAS DataBase Reference)

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
Precautionary statements:	P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. 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. 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.