Melting point :162-164 °C (lit.)
Boiling point :241-243 °C(lit.)
Density :1.412 g/mL at 25 °C(lit.)
vapor pressure :0-0Pa at 20-25℃
refractive index :n20/D 1.523(lit.)
Flash point :>230 °F
storage temp. :Sealed in dry,Room Temperature
form :Crystalline Powder
pka :pK1:1.83;pK2:7.07 (25°C)
color :White to off-white
Water Solubility :40.4 g/100 mL (25 ºC)
BRN :2245168
LogP :-3.3-0.086 at 20-25℃ and pH4-7
Surface tension :71.2mN/m at 1g/L and 20℃
CAS DataBase Reference :1571-33-1(CAS DataBase Reference)
EPA Substance Registry System :Phosphonic acid, phenyl- (1571-33-1)

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 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. 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. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.