557-06-2

Basic information

• Product Name: (Z)-(octadecanoato-O)(9-octadecenoato-O)zinc
• Synonyms: Zinc, (octadecanoato-kappaO)((9Z)-9-octadecenoato-kappaO)-; (Z)-(Octadecanoato-O)(9-octadecenoato-O)zinc; zinc octadecanoate (9Z)-octadec-9-enoate
• CAS NO: 557-06-2
• Molecular Formula: C₁₈H₃₃O₂*C₁₈H₃₅O₂*Zn
• Molecular Weight: 630.3317
• EINECS: 209-152-4
• Mol File: 557-06-2.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 359.4°C at 760 mmHg
• Flash Point: 162.4°C
• Vapor Pressure: 8.58E-06mmHg at 25°C
• CAS DataBase Reference: (Z)-(octadecanoato-O)(9-octadecenoato-O)zinc(CAS DataBase Reference)
• NIST Chemistry Reference: (Z)-(octadecanoato-O)(9-octadecenoato-O)zinc(557-06-2)
• EPA Substance Registry System: (Z)-(octadecanoato-O)(9-octadecenoato-O)zinc(557-06-2)

Safety Data

• Hazardous Substances Data: 557-06-2(Hazardous Substances Data)

Usage

General Description

(Z)-(octadecanoato-O)(9-octadecenoato-O)zinc, also known as zinc stearate, is a chemical compound that is commonly used as a releasing agent or lubricant in various industries such as plastics, rubber, and pharmaceuticals. It is a white, fine powder that is insoluble in water and ethanol but soluble in hydrocarbons. Zinc stearate is often used as a mold release agent in the production of rubber, plastic, and polyurethane products. It is also used as a lubricant in the production of various types of powders, and as an anti-caking agent in cosmetics and pharmaceuticals. Additionally, zinc stearate can act as a stabilizer in PVC and other polymers. Overall, this chemical compound plays a crucial role in various manufacturing processes and product formulations across different industries.

Upstream product

• 557-05-1 zinc stearate 
• 557-07-3 zinc oleate 

Relevant articles and documents

Mixed saturated-unsaturated alkyl-chain assemblies: Solid solutions of zinc stearate and zinc oleate

The linear saturated stearic acid and the bent mono-unsaturated oleic acid do not mix and form solid solutions. However, the zinc salts of these acids can. From X-ray diffraction and DSC measurements we show that the layered zinc stearate and zinc oleate salts form a homogeneous solid solution at all composition ratios. The solid solutions exhibit a single melting endotherm, with the melting temperature varying linearly with composition but with the enthalpy change showing a minimum. By monitoring features in the infrared spectra that are characteristic of the global conformation of the hydrocarbon chain, and hence can distinguish between stearate and oleate chains, it is shown that solid solution formation is realized by the introduction of gauche defects in a fraction of the stearate chains that are then no longer linear. This fraction increases with oleate concentration. It has also been possible from the spectroscopic measurements to establish a quantitative relation between molecular conformational order and the thermodynamic enthalpy of melting of the solid solutions.