Melting point :341-343 °C (lit.)
Boiling point :214.32°C (rough estimate)
Density :1,54 g/cm³
vapor pressure :0Pa at 25℃
refractive index :1.5100 (estimate)
storage temp. :Sealed in dry,Room Temperature
solubility :0.12g/l
form :Crystalline Powder
pka :3.54(at 25℃)
color :White to off-white
PH :3.33(1 mM solution);2.76(10 mM solution);2.24(100 mM solution)
Water Solubility :0.01 g/100 mL (25 ºC)
Merck :14,5197
BRN :1909332
Henry's Law Constant :4.0×10⁹ mol/(m³Pa) at 25℃, Yaws (2003)
Dielectric constant :1.4（Ambient）
Stability :Stable. Incompatible with strong oxidizing agents, strong bases.
InChI :1S/C8H6O4/c9-7(10)5-2-1-3-6(4-5)8(11)12/h1-4H,(H,9,10)(H,11,12)
InChIKey :QQVIHTHCMHWDBS-UHFFFAOYSA-N
SMILES :OC(=O)c1cccc(c1)C(O)=O
LogP :1.66 at 25℃
CAS DataBase Reference :121-91-5(CAS DataBase Reference)
NIST Chemistry Reference :1,3-Benzenedicarboxylic acid(121-91-5)
EPA Substance Registry System :Isophthalic acid (121-91-5)

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. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.