Appearance, white crystalline solid ,
Melting point 174-178,
Vapour pressure3×10-6mPa(25)KowlogP=0.99(PH7).
Density1.48
Solubility25:
water 587ppm(PH5),3.18g/100g(PH7).
dichloromethane 1.4, acetone 4, methanol 15,
toluene 3,
hexane <0.01( g/L,20).
Iyts sodium salt is 10%.
Stability: stable in light, decompsed in 192 ,
DT504-8 weeks(PH5.7-7.0, 20), decompsed in PH<5 ,24-48hourd