香草醛 Vanillin

物理描述 Physical Description

Vanillin appears as white or very slightly yellow needles.

颜色/状态 Color Form

White crystalline needles from water

气味 Odor

Sweetish smell

味道 Taste

Pleasant vanilla taste

沸点 Boiling Point

285.0 °C

熔点 Melting Point

81.5 °C

闪点 Flash Point

153 °C (307 °F) - closed cup

溶解度 Solubility

In water, 1.102X10+4 mg/L at 25 °C

密度 Density

1.056 at 68 °F (NTP, 1992)

蒸气密度 Vapor Density

5.2 (Air = 1)

蒸汽压力 Vapor Pressure

1.18X10-4 mm Hg at 25 °C

稳定性/保质期 Stability Shelf Life

SLOWLY OXIDIZES SOMEWHAT ON EXPOSURE TO MOIST AIR; AFFECTED BY LIGHT

自燃温度 Autoignition Temperature

>400 °C

分解 Decomposition

When heated to decomposition it emits acrid smoke and irritating fumes.

燃烧热 Heat Of Combustion

914.1 kg cal at 20 °C

解离常数 Dissociation Constants

pKa = 7.4 at 25 °C

保留指数 Kovats Retention Index

1403;1386;1349;1354;1350;1365;1379;1348.8;1353.19;1357.77;1362.62;1367.56;1372.86;1378.46;1384.33;1347.9;1350;1447;1360;1360;1360;1361;1367;1389;1352;1360;1360;1347;1347;1350;1350;1386;1348;1348;1367.4;1372;1350;1366;1368;1354;1349;1363.9;1391;1349;1349;1392;1355;1392;1447;1361.8;1392

其他实验性质 Other Experimental Properties

Percent in "saturated" air: 0.00029 at 25 °C, 760 mm Hg

辛醇/水分配系数 LogP

1.21 (LogP)

氢离子浓度指数 pH

Solutions are acid to litmus

碰撞截面 Collision Cross Section

129.7 Ų [M+H]+ [CCS Type: DT, Method: single field calibrated with Agilent tune mix (Agilent)]