E-Caprolactone 502-44-3

Properties of 6-caprolactone

Melting point - 1 ° C

Boiling point 96-97.5 °C10 mm Hg(lit.)

Density 1.03 g/mL at 25 °C(lit.)

Vapor density 3.9 (vs air)

Vapor pressure 0.01 mm Hg (20 °C)

Refractive index n20/D 1.463(lit.)

Flash point 229 ° F

Store below +30°C.

Liquid form

Color Clear, colorless, yellowing on aging

Explosive limit (thermonuclear limit) 1.2-9%(V)

Water solubility >1000 MG/L (20 ° C)

BRN 106919

InChIKey PAPBSGBWRJIAAV UHFFFAOYSA - N

CAS DataBase 502-44-3(CAS DataBase Reference)

NIST chemical information 2-oxepanone (502-44-3)

EPA chemical information 2-oxepanone (502-44-3)

Application and synthesis method of 6- caprolactone

Standard for maximum permissible use and residue of food additives

Chinese name of additive Chinese name of food that is allowed to use this additive maximum permissible amount of additive function (g/kg) maximum permissible residual amount (g/kg)

Delta - caprolactone food spices used to make fragrances must not exceed the maximum permissible use and residue in GB 2760

Chemical properties colorless oily liquid, with aromatic smell, unstable, flammable, easy polymerization, heating into a dimer. Boiling point 215-216℃, 96-97.5 ℃ (1.33kPa), 98-99℃ (266.644Pa), relative density 1.0693 ℃ (20/4℃), refractive index 1.4495 ℃, ignition point 127℃, freezing point -18℃. It is easy to react with organic nitride, and cannot be stored in contact with inorganic acids, organic acids, alkalis, acidic and alkaline salts, water and steam, or close to copper and zinc. Nitrogen should be filled and a small amount of nitrite stabilizer added.

This product is a new type of polyester monomer, mainly used in the production of synthetic rubber, synthetic fiber and synthetic resin. It is also used to manufacture caprolactam, adipic acid, adhesives, coatings, epoxy diluents and solvents. Can also be mixed with various resins to improve its luster, transparency and anti - viscosity.

It can be used for medical materials, simulating human skin, etc.

It is used for making polycaprolactone, epsilon and epsilon - hexanolactam, adhesive and elastomer.

The production method takes acetaldehyde as raw material and ethyl acetate as solvent to prepare peroxyacetic acid through ozone oxidation, and then reacts with cyclohexanone to produce the crude product. The crude caprolactone is qualified by vacuum distillation. Industrial products content ohv - caprolactone content ≥98%. Cyclohexanone can also be oxidized by peracetic acid at 50℃ and normal pressure, with a selectivity of 90%. Raw material consumption quota: hexanone 1500kg/t, acetaldehyde 3000kg/t, acetic acid 1000kg/t.