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E 470 a Calcium Stearate is a carboxylate salt of calcium, classified as a calcium soap.
The salt is a component of some lubricants, surfactants, as well as many foodstuffs.
E 470 a Calcium Stearate is a white waxy powder.
CAS: 1592-23-0
MF: C36H70CaO4
MW: 607.02
EINECS: 216-472-8
Synonyms
STEARIC ACID CALCIUM SALT;OCTADECANOIC ACID CALCIUM SALT;aquacal;calciumdistearate;calstar;dibasiccalciumstearate;flexichem;flexichemcs
E 470 a Calcium Stearate also known as calcium octadecanoic acid.
Light white crystalline powder.
Chemical formula (C17H35COO) 2Ca.
The molecular weight is 607.00. Melting point 179~180 ℃, decomposed by heat.
Insoluble in water, cold ethanol and diethyl ether, soluble in hot benzene, toluene, and turpentine, slightly soluble in hot ethanol and diethyl ether.
E 470 a Calcium Stearate reacts with strong acid to be decomposed into stearic acid and corresponding calcium salt.
Water absorption in the air. Intolerance lipolytic microorganisms.
Pyrolysis to generate stearin ketones and hydrocarbons.
Non-toxic.
Industrial often mixed with the corresponding oleate.
As stabilizers and lubricants of polyvinyl chloride; as halogen absorbent of polyethylene and polypropylene; as lubricants of polyolefin fibers and molded products; as lubricant and release agent of phenolic, amino and other thermosetting plastics; as intensifier of lubricating grease; as waterproofing agent of waterproof fabric; etc.
Food grade E 470 a Calcium Stearate serves as an anti-caking agent.
Dilute soap is made by the reaction of melt stearic acid and sodium hydroxide, reacting with calcium chloride, and E 470 a Calcium Stearate is obtained.
E 470 a Calcium Stearate can be used as heat stabilizer of polyvinyl chloride, it has excellent lubricity.
Thermal stability performance is general, and is less than barium stearate, lead stearate, tin stearate and cadmium stearate.
But E 470 a Calcium Stearate is cheap, low toxicity, good processability.
Combined with Zinc soap and an epoxy compound, E 470 a Calcium Stearate shows a synergistic effect, improving the thermal stability, and it is commonly used for requirements nontoxic soft products, such as food packaging films, medical instruments, etc.
E 470 a Calcium Stearate combines with the base lead salts and lead soaps used for hard products, increasing the gelation speed.
E 470 a Calcium Stearate is used for polyethylene and polypropylene, and it can eliminate the adverse effects of residual catalyst on the resin color and stability.
E 470 a Calcium Stearate is also widely used as lubricant and release agent of thermosetting plastics, such as polyolefin, polyester reinforced plastics, phenolic resin, amino resin, etc.
The disadvantage of E 470 a Calcium Stearate is initial color.
When heating at above 100 ℃ with longer time, E 470 a Calcium Stearate will make the white PVC become a reddish color.
Particularly when titanium dioxide exists in formula, coloring is particularly serious.
At this point, if 0.06~0.12% Na2CO3 or 0.09~0.19 NaHCO3 are added, it can overcome this shortcoming.
But because these substances are too alkaline, they are not used in practice.
In addition, when the amount of this product is large, there is segregation scaling phenomenon.
E 470 a Calcium Stearate is an insoluble salt of octadecanoic acid.
E 470 a Calcium Stearate is formed as "scum" when SOAP, containing the soluble salt sodium octadecanoate, is mixed with hard water containing calcium ions.
Variable proportions of E 470 a Calcium Stearate and calcium palmitate.
E 470 a Calcium Stearate Chemical Properties
Melting point: 147-149°C
density: 1.08g/cm3
vapor pressure: 0Pa at 25℃
Fp: > 260 °C
storage temp.: Store at +5°C to +30°C.
solubility: Soluble in hot pyridine, slightly soluble in oil, but insoluble in alcohol and ether.
form: Powder
color: white
PH: 7-9 (2.2 mg/l, H2O, 20°C)
Odor: Fatty acid odor
Water Solubility: insoluble H2O, ether, chloroform; slightly soluble hot mineral oils [MER06]
Merck: 14,1703
BRN: 3919698
Exposure limits ACGIH: TWA 10 mg/m3; TWA 3 mg/m3
Stability: Hygroscopic
Major Application: pharmaceutical
solid formulation
Cosmetics Ingredients Functions: ANTICAKING COLORANT EMULSION STABILISING VISCOSITY CONTROLLING
Cosmetic Ingredient Review (CIR): Calcium stearate (1592-23-0)
InChI: 1S/2C18H36O2.Ca/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2
InChIKey: CJZGTCYPCWQAJB-UHFFFAOYSA-L
LogP: 3.82-14.34 at 25℃
CAS DataBase Reference: 1592-23-0(CAS DataBase Reference)
EPA Substance Registry System: E 470 a Calcium Stearate (1592-23-0)
E 470 a Calcium Stearate is an odorless, white powder, Insoluble in water, slightly soluble in hot ethanol.
E 470 a Calcium Stearate used in many manufacturing processes and preparations.
Also known as E 470 a Calcium Stearate and octadecanoic acid, it is a carboxylate created by heating stearic acid and calcium oxide.
E 470 a Calcium Stearate has many potential uses, including as a flow agent, stabilizing agent and surface conditioner in the production of certain foods — notably, many candies.
E 470 a Calcium Stearate is used as a mold-release agent for pharmaceutical tablets and capsules, as an anti-caking agent in cosmetics and as a thickener in lubricants and greases.
E 470 a Calcium Stearate is also a stabilizer found in many plastics and is used to process concrete and paper.
E 470 a Calcium Stearate occurs as a fine, white to yellowish-white, bulky powder having a slight, characteristic odor.
E 470 a Calcium Stearate is unctuous and free from grittiness.
E 470 a Calcium Stearate is found in some lubricants and surfactants.
Uses
As non-toxic stabilizers and lubricants, mold release agents of polyvinyl chloride and water repellent of textiles.
As lubricant of coating paper and paint.
As internal lubricant and non-toxic stabilizers of polyvinyl chloride, and as mold release agents of the foundry industry.
Anti-caking agent; adhesive; emulsifier; lubricants; mold release agents; stabilizers; thickeners; flavoring agents.
As stabilizers and lubricants of polyvinyl chloride, and as non-toxic food packaging, medical devices and other soft film containers.
As halogen absorbent of polyethylene and polypropylene, it can eliminate residual catalyst in resin.
As lubricant of resin colors and molding products, but also as release agents of phenolic, amino thermosetting plastic and plastics and lubricant of polyester reinforced plastic, as thickening agent of grease, waterproofing agents of textile and flatting agent of paint.
Food grade E 470 a Calcium Stearate can serve as an anti-caking agent to prevent powdered or crystalline food from aggregation and agglomeration, keeping free-flowing.
But China's GB2760-86 allowing the use of anti-caking agent is currently only potassium ferrocyanide which is used for salt.
According to the FAO/WHO regulations, E 470 a Calcium Stearate can be used for coating glucose powder, sucrose powder and stock cube, etc. , the maximum allowable amount is15 g/kg.
As a waterproofing agent, lubricant and plastic additives.
E 470 a Calcium Stearate is widely used in food, medicine, cosmetics, plastics and rubber industries, mainly used for lubricants, emulsifiers, stabilizers, release agents, accelerators, cosmetic base materials.
In the rigid plastics, E 470 a Calcium Stearate can increase the speed of the condensate.
E 470 a Calcium Stearate can also be used for food packaging, medical devices and other non-toxic flexible film, but also has the effect of stabilizing agent and good long-term stability.
As stabilizers and lubricants of polyethylene and polyvinyl chloride.
As halogen absorbent of polyethylene and polypropylene, E 470 a Calcium Stearate can eliminate the adverse effects of residual resin on catalyst resin color and stability.
E 470 a Calcium Stearate widely used to improve the heat resistance of plastic in foreign countries, improving weather resistance initial color and breathability.
E 470 a Calcium Stearate will replace the toxic stabilizers with same performance.
E 470 a Calcium Stearate is the calcium salt of stearic acid which functions as an anticaking agent, binder, and emulsifier.
E 470 a Calcium Stearate is used in garlic salt, dry molasses, vanilla and vanilla-vanillin powder, salad dressing mix, and meat tenderizer.
E 470 a Calcium Stearate can be used for mold release in the tableting of pressed candies.
E 470 a Calcium Stearate is used as a flow agent in powders including some foods (such as Smarties), a surface conditioner in hard candies such as Sprees, a waterproofing agent for fabrics, a lubricant in pencils and crayons.
The concrete industry uses E 470 a Calcium Stearate for efflorescence control of cementitious products used in the production of concrete masonry units i.e. paver and block, as well as waterproofing.
In paper production, E 470 a Calcium Stearate is used as a lubricant to provide good gloss, preventing dusting and fold cracking in paper and paperboard making.
In plastics,E 470 a Calcium Stearate can act as an acid scavenger or neutralizer at concentrations up to 1000ppm, a lubricant and a release agent.
E 470 a Calcium Stearate may be used in plastic colorant concentrates to improve pigment wetting.
In rigid PVC, E 470 a Calcium Stearate can accelerate fusion, improve flow, and reduce die swell.
Applications in the personal care and pharmaceutical industry include tablet mold release, anti-tack agent, and gelling agent.
E 470 a Calcium Stearate is a component in some types of defoamers.
Pharmaceutical Applications
E 470 a Calcium Stearate is primarily used in pharmaceutical formulations as a lubricant in tablet and capsule manufacture at concentrations up to 1.0% w/w.
Although it has good antiadherent and lubricant properties, E 470 a Calcium Stearate has poor glidant properties.
E 470 a Calcium Stearate is also employed as an emulsifier, stabilizing agent, and suspending agent, and is also used in cosmetics and food products.
Production methods
Firstly melted stearic acid reacts with sodium hydroxide solution to form a dilute soap, then reacted with calcium chloride, E 470 a Calcium Stearate crude is obtained, followed by washed, swirling water, drying, finished product is obtained.
Kg/ton stearate, 920 sodium hydroxide (100% discount) 140 Calcium chloride (100% discount) 400.
After food grade E 470 a Calcium Stearate interacts with calcium chloride solution, follow by filtered and refined.
Preparation
E 470 a Calcium Stearate is produced by heating stearic acid, a fatty acid, and calcium oxide:
2C17H35COOH + CaO→(C17H35COO)2Ca + H2O
E 470 a Calcium Stearate is also the main component of soap scum, a white solid that forms when soap is mixed with hard water.
Unlike soaps containing sodium and potassium, E 470 a Calcium Stearate is insoluble in water and does not lather well.
Commercially E 470 a Calcium Stearate is sold as a 50 % dispersion in water or as a spray dried powder.
As a food additive E 470 a Calcium Stearate is known by the generic E number E470.
