Melting point :227-231 °C
Boiling point :272.46°C (rough estimate)
Density :1.473 (estimate)
refractive index :1.5500 (estimate)
storage temp. :Keep in dark place,Sealed in dry,Room Temperature
solubility :soluble in Methanol
form :Crystalline Powder
pka :3.36±0.20(Predicted)
color :Yellow to beige-pinkish or light brown
λmax :240nm(H2O)(lit.)
InChI :InChI=1S/C6H4O4S/c7-5(8)3-1-11-2-4(3)6(9)10/h1-2H,(H,7,8)(H,9,10)
InChIKey :ZWWLLYJRPKYTDF-UHFFFAOYSA-N
SMILES :C1SC=C(C(O)=O)C=1C(O)=O

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. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection.