Melting point :210-211 °C (dec.) (lit.)
Boiling point :214.32°C (rough estimate)
Density :1.59 g/cm3 at 15 °C
vapor pressure :7.8 hPa (191 °C)
refractive index :1.5100 (estimate)
Flash point :168 °C
storage temp. :Store below +30°C.
solubility :methanol: 0.1 g/mL, clear
pka :2.89(at 25℃)
form :Powder
color :White
PH :3.2(1 mM solution);2.55(10 mM solution);2(100 mM solution);
Water Solubility :7 g/L (25 ºC)
Merck :14,7371
BRN :608199
Dielectric constant :5.1（Ambient）
Stability :Stable. Combustible. Incompatible with strong oxidizing agents.
InChIKey :XNGIFLGASWRNHJ-UHFFFAOYSA-N
LogP :0.73 at 20℃
CAS DataBase Reference :88-99-3(CAS DataBase Reference)
NIST Chemistry Reference :1,2-Benzenedicarboxylic acid(88-99-3)
EPA Substance Registry System :Phthalic acid (88-99-3)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes 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 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P271 Use only outdoors or in a well-ventilated area. 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.