Melting point :300 °C
Boiling point :363.26℃[at 101 325 Pa]
Density :1.342 (estimate)
vapor pressure :0Pa at 25℃
refractive index :1.5500 (estimate)
storage temp. :Keep in dark place,Inert atmosphere,Room temperature
solubility :3.565g/L in organic solvents at 20 ℃
form :Crystalline Powder
pka :2.48(at 25℃)
color :White to beige
Water Solubility :sparingly soluble
Merck :14,6882
BRN :1309204
InChIKey :ZMCHBSMFKQYNKA-UHFFFAOYSA-N
LogP :0 at 23℃
CAS DataBase Reference :88-21-1(CAS DataBase Reference)
NIST Chemistry Reference :Aniline-o-sulfonic acid(88-21-1)
EPA Substance Registry System :o-Aminobenzenesulfonic acid (88-21-1)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes 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. P280 Wear protective gloves/protective clothing/eye protection/face protection. 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. P363 Wash contaminated clothing before reuse.