Nanjing Hongzun Chemical Plant Co., Ltd
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Laurocapram For Printing And Dyeing
Nanjing Hongzun Chemical Plant Co., Ltd.

Item Index
Appearance Colorless transparent viscous liquid
Content(%) ≥96.0
Refractivity 1.470-1.473
Relative density 0.906-0.926
Packing & Storage
Packing in 10kg carton(500ml/bottle), 20kg paper barrel, 25kg drum, 100kg drum
Storage 20℃, 2 years.
Shipping Room temperature in China; may vary elsewhere
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General information
Chemical & Physical Properties
Safety Information
Synthetic Route
Common Names Laurocapram | Azone | 1-dodecyl-hexahydro-azepin-2-one
CAS No. 59227-89-3 Boiling Point (℃) 404.9±14.0 °C
Molecular Weight 281.477 Melting Point (℃) '-7ºC
Appearance Colorless liquid Vapor Specific Gravity 0.9±0.1 g/cm3
HS Code 2933990099 Flash Point (℃) 165.2±10.7 °C
Solubility Insoluble in water, soluble in ethanol, ether, acetone and benzene Autoignition Temperature (℃)
Safety Phrases
WGK Germany
Packaging Group
Hazard Class
Inhalation Cough. Sore throat. Use local exhaust or breathing protection. Fresh air, rest.
Skin Redness. Burning sensation. Itching. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness. Pain. Wear safety goggles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion Abdominal pain. Nausea. Vomiting. Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.

1) In a reaction vessel equipped with a stirrer, add dodecane bromide and solvent oil, control the stirring speed to 30120rpm, heat the temperature of the solvent oil solution to 4595°C, add caprolactam, tetrabutylammonium bromide TBAB, hydroxide Sodium, reaction 38 hours; Bromododecane: caprolactam: sodium hydroxide is 1mol: 0.81.4mol: 0.82mol, solvent oil is greater than the quality of total raw material of reaction, a small amount of phase transfer catalyst TBAB tetrabutyl ammonium bromide;

2) Add an appropriate amount of water to the reaction solution to dissolve sodium hydroxide and the sodium bromide generated by the reaction, let stand to separate layers, and separate the lower aqueous solution; after the upper organic layer recovers the solvent oil under normal pressure, it is distilled under reduced pressure to obtain the finished product of azone. More than 92%, Azone content is more than 95%.

Frequently Asked Questions

Application of laurocapram in printing and dyeing, leather and chemical fiber industry

At normal temperature, laurocapram is a colorless, odorless, non-toxic and non-irritating oily transparent liquid with lubricity, easy coating and strong permeability. It is also an organic chemical with a wide range of uses, and its high-efficiency permeation-promoting properties, non-toxic safety and other characteristics have attracted people's attention. It has a permeation-promoting effect on both hydrophilic and hydrophobic compounds.

As a dyeing enhancer, laurocapram can enhance the permeability of dyeing, has strong affinity with dyes, strong level dyeing, low coloring temperature and good color fixing effect. It can increase the softness and gloss of fabrics and leather, and greatly improve the quality of dyeing.