Melting point :131-134 °C(lit.)
Boiling point :284 °C(lit.)
Density :1,53 g/cm³
vapor density :5.1 (vs air)
vapor pressure :<0.01 mm Hg ( 20 °C)
refractive index :1.4500 (estimate)
Flash point :152 °C
storage temp. :Store below +30°C.
solubility :6g/l (slow decomposition)
form :Flaky Crystals
pka :2.97[at 20 ℃]
color :White
Odor :Characteristic choking odor
PH Range :2 at 6 g/l at 20 °C
PH :2 (6g/l, H2O, 20℃)
explosive limit :1.7-10.5%(V)
Water Solubility :6 g/L (20 ºC)
Sensitive :Moisture Sensitive
Merck :14,7372
BRN :118515
Henry's Law Constant :6.29 at 20 °C (approximate - calculated from water solubility and vapor pressure)
Exposure limits :NIOSH REL: TWA 6 mg/m³ (1 ppm), IDLH 60 mg/m³; OSHA PEL: TWA 12 mg/m³ (2 ppm); ACGIH TLV: TWA 1 ppm (adopted).
Stability :Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, moisture, strong acids. Dust may form an explosive mixture with air.
LogP :2.07 at 20℃
CAS DataBase Reference :85-44-9(CAS DataBase Reference)
NIST Chemistry Reference :Phthalic anhydride(85-44-9)
EPA Substance Registry System :Phthalic anhydride (85-44-9)

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 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 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310 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.