乙酸酐 Acetic anhydride

物理描述 Physical Description

Acetic anhydride appears as a clear colorless liquid with a strong odor of vinegar. Flash point 129°F. Corrosive to metals and tissue. Density 9.0 lb /gal. Used to make fibers, plastics, pharmaceuticals, dyes, and explosives.

颜色/状态 Color/Form

Colorless liquid

气味 Odor

Strong acetic odor

沸点 Boiling Point

139.5 °C

熔点 Melting Point

-73.0 °C

闪点 Flash Point

49 °C c.c.

溶解度 Solubility

In water, 120 g/L at 20 °C

密度 Density

1.082 g/cu cm at 20 °C

蒸气密度 Vapor Density

3.52 (NTP, 1992) (Relative to Air)

蒸汽压力 Vapor Pressure

VP: 1 Pa at -44 °C (ext); 10 Pa at -25 °C (ext): 100 Pa at -1 °C (ext); 1 kPa at 31 °C; 10 kPa at 75.1 °C; 100 kPa at 203 °C (ext)

稳定性/保质期 Stability/Shelf Life

Stable under recommended storage conditions.

自燃温度 Autoignition Temperature

316 °C (600 °F)

分解 Decomposition

When heated to decomposition it emits toxic fumes.

粘度 Viscosity

0.843 mPa.s at 25 °C

腐蚀性 Corrosivity

Corrosive

燃烧热 Heat Of Combustion

-7058 Btu/lb = -3021 cal/g = -164.2X10+5 J/kg

汽化热 Heat Of Vaporization

38.2 kJ/mol at 139.5 °C

表面张力 Surface Tension

31.93 mN/m at 25 °C

电离电位 Ionization Potential

10.00 eV

气味阈值 Odor Threshold

Odor Threshold Low: 0.12 [mmHg]; Odor Threshold High: 0.36 [mmHg]; Detection odor threshold from AIHA (mean <0.14 ppm)

折光率 Refractive Index

Index of refraction: 1.3901 at 20 °C/D

相对蒸发率 Relative Evaporation Rate

0.46 (Butyl acetate = 1)

保留指数 Kovats Retention Index

706 ;706 ;699

其他实验性质 Other Experimental Properties

Specific gravity: 1.080 at 15 °C/4 °C

聚合 Polymerization

Polymerization does not occur.

辛醇/水分配系数 LogP

-0.27

化学类 Chemical Classes

Other Classes -> Acid Anhydrides, Other