二硫化碳 carbon disulfide

物理描述 Physical Description

Carbon disulfide appears as a clear colorless to light yellow volatile liquid with a strong disagreeable odor. Boiling point 46° C. Flash point -22°F. Flammable over a wide vapor/air concentration range(1%-50%). Vapors are readily ignited; the heat of a common light bulb may suffice. Insoluble in water and more dense (10.5 lb / gal) than water. Hence sinks in water. Vapors are heavier than air. Used in the manufacture of rayon and cellophane, in the manufacture of flotation agents and as a solvent.

颜色/状态 Color Form

Mobile ... liquid

气味 Odor

Purest distillates have sweet, pleasing, and ethereal odor ... usual commercial and reagent grades are foul smelling

沸点 Boiling Point

46.0 °C

熔点 Melting Point

-111.5 °C

闪点 Flash Point

-22 °F (-30 °C) (Closed cup)

溶解度 Solubility

In water, 2160 mg/L at 25 °C

密度 Density

1.2632 g/cu cm at 20 °C

蒸气密度 Vapor Density

2.67 (EPA, 1998) (Relative to Air)

蒸汽压力 Vapor Pressure

359 mm Hg at 25 °C

亨利常数 Henrys Law Constant

0.01 atm-m3/mole

稳定性/保质期 Stability Shelf Life

Stable under recommended storage conditions.

自燃温度 Autoignition Temperature

194 °F (90 °C)

分解 Decomposition

Decomposes on standing for a long time.

粘度 Viscosity

Coefficient of viscosity = 0.363 at 20 °C

腐蚀性 Corrosivity

Carbon disulfide is normally stored and handled in mild steel equipment. ... Copper and copper alloys are attacked by carbon disulfide and must be avoided.

燃烧热 Heat Of Combustion

-5814 btu/lb = -3230 cal/g = -135.2X10+5 J/kg

汽化热 Heat Of Vaporization

84.1 cal/g at BP

表面张力 Surface Tension

32.25 dynes/cm at 20 °C

电离电位 Ionization Potential

10.08 eV

气味阈值 Odor Threshold

0.1 TO 0.2 PPM

折光率 Refractive Index

Index of refraction = 1.6319 at 20 °C

相对蒸发率 Relative Evaporation Rate

22.6 (Butyl acetate = 1)

保留指数 Kovats Retention Index

512;539;517;515;530;533.5;537;537;537;530;517.5;523.7;527;518;524;513;514;524;527;517;512;524

其他实验性质 Other Experimental Properties

Dipole moment 0.0; heat of fusion 1.049 kcal/mole; heat capacity at 24.3 °C: 18.17 cal/mole/deg; ebullioscopic constant 2.35 deg; dielectric constant 2.641 at low frequencies. Burns with blue flame to carbon dioxide and sulfur dioxide; azeotrope with water bp 42.6 °C, contains 97.2% carbon disulfide

辛醇/水分配系数 LogP

1.94 (LogP)

辛醇/空气分配系数 Logkoa

2.28 (Octanol-Air partition coefficient)