Physical Properties
Molecular weight:361.4; Physical form:White powder; ( tech., pale yellow grains). Density:(E)- isomer 1.3868; (Z)- isomer 1.2734 (both 20 °C); Composition:Tech. is >93%: (E)- isomer 75-78%, (Z)- isomer 20-11%. Melting point:Tech. 105 °C; pure (E)- isomer 107-109 °C; pure (Z)- isomer 70 °C; Vapour pressure:(E)- isomer 3.5 × 10-2 mPa (25 °C); (Z)- isomer 2.681 ×10-2 mPa (25 °C); Partition coefficient(n-octanol and water):(E)- isomer, logP = 2.98 (21.5 °C); (Z)- isomer, logP = 2.70 (20.6 °C); Solubility:(E)- isomer: in water 0.00925, methanol 14.6 (both in g/l, 20 °C). (Z)- isomer: in water 0.175, methanol 14.0 (both in g/l, 20 °C).; Stability:Stable in water (>1 y, pH 4-9), to light, and to heat (not decomposed after 14 d at 55 °C);