Melting point :131-134 °C(lit.)
Boiling point :284 °C(lit.)
bulk density :500-700kg/m3
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)
Specific Heat Capacity :Cp(crystal): 1.08 J/(g·K), at 25℃
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 :ACGIH:TLV-TWA 0.002 mg/m3 (0.0003 ppm),Inhalable fraction and vapor; TLV-STEL 0.005 mg/m3 (0.0009 ppm),Inhalable fraction and vapor
OSHA:PEL-TWA 2 ppm (12 mg/m3)
NIOSH:REL-TWA 6 mg/m3 Stability :Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, moisture, strong acids. Dust may form an explosive mixture with air.
InChI :1S/C8H4O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1-4H
InChIKey :LGRFSURHDFAFJT-UHFFFAOYSA-N
SMILES :O=C1OC(=O)c2ccccc12
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 H290 May be corrosive to metals Corrosive to Metals Category 1 Warning P234, P390, P404 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 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 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 H371 May cause damage to organs Specific target organ toxicity, single exposure Category 2 Warning P260, P264, P270, P309+P311, P405,P501 H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, 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:	P234 Keep only in original container. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P284 Wear respiratory protection. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P333+P313 IF SKIN irritation or rash occurs: Get medical advice/attention. P390 Absorb spillage to prevent material damage. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up. P406 Store in corrosive resistant/… container with a resistant inner liner. P501 Dispose of contents/container to..…