Melting point :290-292 °C(lit.)
Boiling point :392.79°C (rough estimate)
Density :1.2864 (rough estimate)
refractive index :1.4450 (estimate)
storage temp. :Sealed in dry,Room Temperature
solubility :DMSO:3.06(Max Conc. mg/mL);9.1(Max Conc. mM)
DMSO:PBS (pH 7.2) (1:1):0.5(Max Conc. mg/mL);1.49(Max Conc. mM)
DMF:1.25(Max Conc. mg/mL);3.72(Max Conc. mM)
Water:50.0(Max Conc. mg/mL);148.68(Max Conc. mM) pka :4.20±1.00(Predicted)
form :Fine Crystalline Powder
color :White
Water Solubility :Soluble in aqueous alkaline solutions, organic bases, 0.1 N NaOH (15 mg/ml), Pyridine (50 mg/ml), chloroform (slightly soluble), and benzene (slightly soluble). Insoluble in water, and alcohols.
Merck :14,3090
EPA Substance Registry System :2H-1-Benzopyran-2-one, 3,3'-methylenebis[4-hydroxy- (66-76-2)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,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 H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:	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. P273 Avoid release to the environment. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P314 Get medical advice/attention if you feel unwell.