Stearic acid CAS NO.57-11-4

product information

stearic acid basic information

fatty acid the main application and effect iso-stearic acid and its derivatives toxicity limited use the maximum allowable amount as food additives and maximum allowable residue limits chemical properties application production method

product name:	stearic acid
synonyms:	cetylacetic acid;fema 3035;carboxylic acid c18;c18;c18:0 fatty acid;acidum stearicum 50;n-octadecylic acid;n-octadecanoic acid
cas:	57-11-4
mf:	c18h36o2
mw:	284.48
einecs:	266-928-5
product categories:	miscellaneous natural products;alkylcarboxylic acids;biochemistry;higher fatty acids & higher alcohols;monofunctional & alpha,omega-bifunctional alkanes;monofunctional alkanes;saturated higher fatty acids;chemical intermediate;plasticizer, stabilizer and lubricant;food additives
mol file:	57-11-4.mol

stearic acid chemical properties

mp	67-72 °c(lit.)
bp	361 °c(lit.)
density	0.84
vapor pressure	1 mm hg ( 173.7 °c)
fema	3035
refractive index	1.4299
fp	>230 °f
storage temp.	2-8°c
form	powder
water solubility	0.1-1 g/100 ml at 23 ºc
merck	14,8804
brn	608585
cas database reference	57-11-4(cas database reference)
nist chemistry reference	octadecanoic acid(57-11-4)

safety information

hazard codes	xi,f
risk statements	38-36/37/38-11
safety statements	37/39-26-16
wgk germany	3
rtecs	wi2800000
hs code	38231100
hazardous substances data	57-11-4(hazardous substances data)

msds information

provider	language
stearic acid	english
sigmaaldrich	english
acros	english
alfa	english

stearic acid usage and synthesis

fatty acid

stearic acid is one of several major long-chain fatty acids comprising oils and fats. it is presented in animal fats, oil and some kinds of vegetable oils as wellin the form of glycerides. these oils, after hydrolysis, produce the stearic acid. stearic acid is a fatty acid widely existing in nature and has the general chemical properties of carboxylic acids. almost all kinds of fat and oil contain certain amount of stearic acid with the content in the animal fats being relative high. for example, the content in the butter can reach up to 24% while the content in vegetable oil is relative low with the value in tea oil being 0.8% and the oil in palm being 6%. however, the content in cocoa can reach as high as 34%. there are two major approaches for industrial production of stearic acid, namely fractionation and compression method. add decomposition agent to the hydrogenated oil, and then hydrolyze to give the crude fatty acid, further go through washing with water, distillation, bleaching to obtain the finished products with glycerol as the byproduct. most domestic manufacturers use animal fat for production. some kinds of production technology will result in the incompletion of the distillation of fatty acid which produce stimulating odor at the time of the plastic processing and high temperatures. although these odor is of no toxic but they will have certain effect on the working conditions and the natural environment. most imported form of stearic acid takes vegetable oil as the raw materials, the production processes are more advanced; the produced stearic acid is of stable performance, good lubrication property and less odor in the application. stearic acid is mainly used for the production of stearates such as sodium stearate, magnesium stearate, calcium stearate, lead stearate, aluminum stearate, cadmium stearate, iron stearate, and potassium stearate. the sodium or potassium salt of stearic acid is the component of soap. although sodium stearate has a less decontamination ability than sodium palmitate, but its presence may increase the hardness of soap. take butter as raw material, go through sulfuric acid or pressurized method for decomposition. the free fatty acids was first subject to water pressure method for removing the palmitic acid and oleic acid at 30 ~ 40 ℃, and then dissolved in ethanol, followed by addition of barium acetate or magnesium acetate which precipitates stearate. then further add dilute sulfuric acid to get the free stearate acid, filter and take it, and re-crystallize in ethanol to obtain the pure stearic acid. the above information is edited by the chemicalbook of dai xiongfeng.

the main application and effect

stearic acid is widely used in cosmetics, plastics plasticizers, mold release agents, stabilizers, surfactants, rubber vulcanization accelerator, waterproof agent, polishing agent, metal soap, metal mineral flotation agents, softeners and pharmaceuticals as well as other organic chemicals. stearic acid can also be used as the solvents of oil-soluble paint, crayons lubrication agent, stencil lighting agent and the emulsifier of stearic acid glyceride. stearic acid can also be widely used in the manufacturing of pvc pipe, sheet material, profiles and film and is the pvc heat stabilizers with good lubricity and excellent stability against light and heat. in the application of polyvinyl chloride pipe, stearic acid helps prevent the "coke" during the processing and is effective heat stabilizer during pvc film processing while also preventing the discoloration of the finished film discoloration caused by exposure. stearic acid has become the additive for lubrication, plasticization and stabilization of the filled masterbatch. stearic acid can effectively improve the coating activating effect of inorganic powder and increase the flow rate of materials. when there is demand for a large flow rate of the melt for material with inorganic powder accounting for the most part, an appropriate increase in the content of stearic acid can significantly increase the melt flow rate of material. however, the amount of stearic acid used in filled masterbatch also have threshold with its amount being controlled in about 1% of the total mass. if the added amount is over-excessive, it will not only cause the decrease of the quality and the performance of plastic products but also generate sticky substance in the die lip location of the manufacturing equipment of the plastic products, affecting the production efficiency and product quality. the mono- or multi-alcohol ester of stearic acid can be used as cosmetics, nonionic surfactants and plasticizers. its alkali metal salt can be dissolved in water and is a major component of soap. other kinds of salts can be used as waterproofing agents, lubricants, bactericides, coating additives and pvc stabilizers.

company information

henan sunlake enterprise corporation is located in henan province , the central plain of china , which enjoys favorable geogeaphical position and convenient transportion, the com[any was established in june. 1998 , until now having more than 18 years experience in manufacturing & exporting chemical raw material .

sunlake is a professional manufacturer engaged in producing and selling chemicals,including organic & inorganic chemicals , pigments & dyestuffs , water treatment chemicals , food & feed additives and others . these products have been being well exported to europe , southeast asia , the middle east , africa , south america and some other countries and areas.

we sincerely welcome foreign friends to visit our plant for cooperation. with the idea of "quality first,credit priority, excellent service", we are highly acknowledged by customers for good quality and competitive price. more importantly , the company has a strong r & d team, who are professional engineers and scholars with ph. d. .so we are confident to serve you better with our high - quality products and professional team.

we are taking great efforts to provide our customers with demanded goods and professional services, and continuously improve our core ability of competition and get the momentum for sustainable development, and finally make us being a reliable and professional wupplier in international market.

we welcome any serious inquiries from all customers of the world, and sincerely hope to cooperate.