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Zinc stearate

Outline Uses How to remove residual zinc stearate of aluminum surface processing Product Features
Zinc stearate
Zinc stearate structure
Chemical Name:
Zinc stearate
Coad;Mathe;Hytech;Hydense;Metallac;Synpro 8;Zinc(II);AQUA ZINC;ai3-00388;Dermarone
Molecular Formula:
Formula Weight:
MOL File:

Zinc stearate Properties

Melting point:
128-130 °C(lit.)
Flash point:
alcohol: insoluble(lit.)
Water Solubility 
Stable. Incompatible with strong oxidizing agents.
Substances Added to Food (formerly EAFUS)
CAS DataBase Reference
557-05-1(CAS DataBase Reference)
182.8994; 582.5994; 176.180; 177.1460; 177.2410; 178.2010; 310.545
EWG's Food Scores
NIST Chemistry Reference
Zinc(II) n-octadecanoate(557-05-1)
EPA Substance Registry System
Zinc stearate (557-05-1)
  • Risk and Safety Statements
Hazard Codes  Xi
Risk Statements  37
Safety Statements  22-26-36/37/39-38-24/25
WGK Germany  -
RTECS  ZH5200000
Autoignition Temperature 1454 °F
HS Code  29157090
Toxicity LD50 oral in rat: > 10gm/kg
NFPA 704
1 0

Zinc stearate price More Price(9)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 26423 Zinc stearate purum, 10-12% Zn basis 557-05-1 1kg $43.4 2019-12-02 Buy
Sigma-Aldrich 26423 Zinc stearate purum, 10-12% Zn basis 557-05-1 10kg $126 2019-12-02 Buy
Alfa Aesar 033238 Zinc stearate ZnO 12.5-14% 557-05-1 50g $20.6 2020-06-24 Buy
Alfa Aesar 033238 Zinc stearate ZnO 12.5-14% 557-05-1 250g $22.8 2020-06-24 Buy
Sigma-Aldrich 307564 Zinc stearate technical grade 557-05-1 25g $34.6 2019-12-02 Buy

Zinc stearate Chemical Properties,Uses,Production


Zinc stearate is white light fine powder. Formula is ZN (C17H35COO) 2, molecular structure is  RCOOZnOOCR (R is alkyl group of industry stearate), it is combustible, specific gravity is 1.095, ignition point is 900℃, density is 1.095, melting point is 130℃, it has creamy feel. It is insoluble in water, alcohol, ether, soluble in hot ethanol, turpentine, benzene and other organic solvents and acids. Zinc stearate is heated and dissolved in organic solvent, when exposes cold, it becomes jelly, when meets strong acid, it can decompose into stearic acid and corresponding zinc. It has lubricity, hygroscopic, non-toxic, slightly irritating, non-polluting, non-hazardous properties. For zinc stearate is dissolved in benzene and calcium stearate is benzene-insoluble, it is possible to separate the calcium stearate and zinc stearate.
Zinc stearate is not soluble in polar solvents, but when be heated, it is high dissolved in aromatic compound agent chlorinated hydrocarbons. The main application areas are plastics and rubber industry, it is used as lubricant and release agent for excellent compatibility.


1. Zinc stearate can be used as rubber products soften lubricants, textiles lighting agent, PVC stabilizers.
2. It can be used as stabilizer in polyvinyl chloride plastics, rubber softener.
3. Zinc stearate can be used in the pharmaceutical industry, preparation of solidified oil and lubricants, it can be also used as paint drying agent. Non-toxic products for PVC and rubber processing, the synergy of calcium stearate and barium stearate can effectively improve PVC and rubber for light and heat stability, PVC processing amount is usually <1; it can be used for touch agent of rubber products, it can also be used as polymeric additive of PP, PE, PS, EPS and pencil manufacturing, it is generally used in the amount of 1 to 3 parts.

How to remove residual zinc stearate of aluminum surface processing

It is generally used polish manner to treat residual zinc stearate. It maybe damage the substrate when uses lure acid.

Product Features

Zinc stearate has good thermal stability, initial stage stainability is small, it has good light stability and it has synergy effect with calcium stearate and barium stearate, it has foam effect and it can be used as foaming aid in foam products, it can be used as the lubricant of cosmetic face powder.
Glue the pink plastic lubricants.
Zinc stearate is used as PVC stabilizers. When coordinates with barium-cadmium soap, it is mainly used in soft products, characteristic is that it can restrain initial coloration and avoid sulfide pollution. Zinc stearate can also be used styrene (polystyrene and ABC, SAN resins), phenolic resins, amino resins and plastics and other heat-curing polyester plasticizer, lubricant and release agent of transparent products. In the rubber industry, it can be used as rubber lubricants and anti-blocking agent, curing catalyst media activator.
It can be used as lighting agent of textile products.
It can be used as flatting agent in enamel paint industry.


Zinc stearate is a "zinc soap" that is widely used industrially. In this context, soap is used in its formal sense, a metal "salt" of a fatty acid. It is a white solid that repels water. It is insoluble in polar solvents such as alcohol and ether but soluble in aromatic hydrocarbons (e.g., benzene and chlorinated hydrocarbons) when heated. It is the most powerful mold release agent among all metal soaps. It contains no electrolyte and has a hydrophobic effect. Its main application areas are the plastics and rubber industry where it is used as a releasing agent and lubricant which can be easily incorporated.
Zinc carboxylates, e.g. basic zinc acetate, adopt complex formulas, and are not simply dicarboxylates of zinc. Instead the formula for most zinc carboxylates is Zn4O(O2CR)6, consisting of a Zn4O6+ core with carboxylate ligands spanning the edges.

Chemical Properties

white powder with fatty acid odour

Chemical Properties

Zinc stearate occurs as a fine, white, bulky, hydrophobic powder, free from grittiness and with a faint characteristic odor.


Used in Rubber, Plastic, Poyester, Abbrasive, Coating, Printing Inks and PVC Industry.


In tablet manufacture; in cosmetic and pharmaceutical powders and ointments; as a flatting and sanding agent in lacquers; as a drying lubricant and dusting agent for rubber; as a plastic mold releasing agent; as a waterproofing agent for concrete, rock wool, paper, textiles.


zinc stearate is used in cosmetic formulations to increase adhesive properties. It is also used as a coloring agent. This is a mixture of the zinc salts of stearic and palmitic acids.


It is widely used as a release agent for the production of many kinds of objects rubber, poly urethane, poly ester processing system, powder metallurgy. These applications exploit its "non-stick" properties . In cosmetics, zinc stearate is a lubricant and thickening to improve texture.
It is an "activator" for rubber vulcanization by sulfur and accelerators. As discovered in the early days of vulcanization, zinc has a beneficial effect on the reaction of the sulfur with the polyolefin. The stearate is a form of zinc that is highly soluble in the nonpolar medium of the poly olefins.
Being lipophilic, it functions as a phase transfer catalyst for the saponification of fats.

Production Methods

An aqueous solution of zinc sulfate is added to sodium stearate solution to precipitate zinc stearate. The zinc stearate is then washed with water and dried. Zinc stearate may also be prepared from stearic acid and zinc chloride.

General Description

White, hydrophobic powder with a slight, characteristic odor. Mp: 130°C. Density: 1.1 g cm-3. Insoluble in water, ethyl alcohol and diethyl ether. Soluble in acids. Non-toxic. In technical grades, the percentage of zinc may vary according to the intended use. Products with less than the theoretical amount of zinc are more acidic.

Reactivity Profile

Zinc stearate is non-flammable but combustible. Incompatible with oxidizing agents, dilute acids. Emits acrid smoke and fumes of ZnO when heated to decomposition (Hazardous Chemicals Desk Reference, p. 865 (1987)).

Pharmaceutical Applications

Zinc stearate is primarily used in pharmaceutical formulations as a lubricant in tablet and capsule manufacture at concentrations up to 1.5% w/w. It has also been used as a thickening and opacifying agent in cosmetic and pharmaceutical creams, and as a dusting powder.

Safety Profile

Poison by intratracheal route. Inhalation of zinc stearate has been reported as causing pulmonary fibrosis. A nuisance dust. Combustible when exposed to heat or flame. To fight fire, use water, foam, CO2, dry chemical. When heated to decomposition it emits toxic fumes of ZnO. See also ZINC COMPOUNDS.


Zinc stearate is used in oral and topical pharmaceutical formulations, and is generally regarded as a nontoxic and nonirritant excipient. However, following inhalation, it has been associated with fatal pneumonitis, particularly in infants. As a result, zinc stearate has now been removed from baby dusting powders.
LD50 (rat, IP): 0.25 g/kg


Zinc stearate is stable and should be stored in a well-closed container in a cool, dry place.


Zinc stearate is decomposed by dilute acids. It is incompatible with strong oxidizing agents.

Regulatory Status

GRAS listed. Included in the FDA Inactive Ingredients Database (oral capsules and tablets). Included in nonparenteral medicines licensed in the UK. Included in the Canadian List of Acceptable Non-medicinal Ingredients.

Zinc stearate Preparation Products And Raw materials

Raw materials

Preparation Products

Zinc stearate Suppliers

Global( 330)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shanghai Yingrui Biopharma Co., Ltd.
+86-21-34979012 CHINA 739 60
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 China 2678 55
Chemson Industrial (Shanghai) Co., Ltd.
86-21-65180813 CHINA 117 58
Shanghai Zheyan Biotech Co., Ltd.
18017610038 CHINA 3623 58
career henan chemical co
+86-371-86658258 CHINA 30043 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 23977 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28231 58
Haihang Industry Co.,Ltd
+86 531 8582 1093 CHINA 10157 58
Hebei Guanlang Biotechnology Co., Ltd.
whatsapp: +8619930501651 CHINA 2581 58
Xiamen AmoyChem Co., Ltd
+86 592-605 1114 CHINA 6371 58

View Lastest Price from Zinc stearate manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2020-04-21 Zinc stearate
US $1.00 / KG 1KG 325 mesh ≥99.0% 100T Henan Xiangtong Chemical Co., Ltd.
2020-07-14 Zinc stearate Joyce
US $20.00 / KG 100g 99% 10tons Xingtai Haoxun Import and Export Trade Co., Ltd.
2020-07-22 Zinc stearate
US $1.80 / Kg/Bag 1T 99% 1000tons/month Hebei Yanxi Chemical Co., Ltd.

Zinc stearate Spectrum

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