You’ll find stearic acid listed on product labels under several different names, some which include: Because SA is sometimes sourced from animals, it’s not always suitable for vegans or found in vegan cosmetics. Fatty acids are classic components of candle-making. Stearic acid esters of ethylene glycol, glycol stearate, and glycol distearate are used in shampoos, soaps, and other daily use cosmetic items to achieve a pearly effect. The IUPAC name is octadecanoic acid. Benefits include naturally cleansing skin, lubricating skin and hair, and emulsifying ingredients in products and supplements. The solubility of stearic acid in dichloromethane under ambient temperatures corresponds to 3.58 grams per 100 grams of dichloromethane. Lithium stearate is an important component of grease. Is stearic acid soluble in water? Stearic acid (/ˈstɪərɪk/ STEER-ik, /stiˈærɪk/ stee-ARR-ik) is a saturated fatty acid with an 18-carbon chain. It fact, it can help cleanse pores of excess oil and substances that can build up to form blackheads/whiteheads. In fireworks, stearic acid is often used to coat metal powders such as aluminium and iron. It is added at the rate of 0.6 g per kg of the oxide while preparing the paste. This prevents oxidation, allowing compositions to be stored for a longer period of time. In general, the applications of stearic acid exploit its bifunctional character, with a polar head group that can be attached to metal cations and a nonpolar chain that confers solubility in organic solvents. The stearate salts of zinc, calcium, cadmium, and lead are used to soften PVC. 3rd ed. You can use SA at home to make your own lotions and soaps. Your email address will not be published. It also reduces the extension of oxidation of the freshly formed lead (negative active material) when the plates are kept for drying in the open atmosphere after the process of tank formation. Stearic acid side effects are rare, as this fatty acid is naturally occurring inside the human body. It is generally nontoxic but when inhaled can cause irritation in the throat, nose, and eyes. Animal fats are higher in stearic acid than most plants that contain oils. Stearic acid is a long chain saturated fatty acid. [10] The triglyceride derived from three molecules of stearic acid is called stearin. It’s used to thicken/harden formulas and bind together ingredients so they don’t wind up separating into liquid and oily layers. Stearic Acid is a typical example of a fatty acid, which are essentially long hydrocarbon chains containing a carboxyl group at one end and a methyl group at the other. Question: Stearic Acid Is Insoluble In Water, But Sodium Stearate Is. Stearic acid is used along with simple sugar or corn syrup as a hardener in candies. Try stearic acid in a variety of recipes that use beneficial ingredients, such as: You can combine SA with other emulsifiers or waxes in cream/lotion recipes if you want a very smooth finished product. & detox juicing guide. It is produced from oils and fats by the process of saponification of triglycerides by using hot water at about temperature range of 100 degree celsius. In fact, the presence of SA is partially what gives moisturizing products like cocoa butter and shea butter their thicker consistency and lubricating effects. Purified stearic acid is available but less commonly sold. Detergents are obtained from amides and quaternary alkylammonium derivatives of stearic acid. As an example, it can be used to make castings from a plaster piece mold or waste mold, and to make a mold from a shellacked clay original. Below is a basic homemade lotion recipe provided by the Soap Queen website: You can also add stearic acid to these DIY beauty/skin care recipes: The U.S Food and Drug Administration (FDA) considers stearic acid safe for both consumption as a food additive and for topical use in skin care products in limited quantities. Avocado Oil: Healthiest Oil on the Planet? CS1 maint: multiple names: authors list (, Ullmann's Encyclopedia of Industrial Chemistry, "硬脂酸;十八烷酸;十八酸;十八碳烷酸;Stearic acid;Octadecanoic acid;物理性质,化学性质,英文名,分子量,结构式,分子式,CAS号,制备方法,用途,溶点,沸点,毒性,MSDS,供应商,公司", "Lexicon of lipid nutrition (IUPAC Technical Report)", "Re-evaluation of fatty acids (E 570) as a food additive", "Cardiovascular disease risk of dietary stearic acid compared with trans, other saturated, and unsaturated fatty acids: A systematic review", Indonesia Commodity and Derivatives Exchange, https://en.wikipedia.org/w/index.php?title=Stearic_acid&oldid=981449338, Short description is different from Wikidata, Pages using collapsible list with both background and text-align in titlestyle, Chemical articles with unknown parameter in Chembox, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License, This page was last edited on 2 October 2020, at 11:19. 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The exceptions to this rule are cocoa butter and shea butter, two plant-derived products that are both relatively concentrated sources of SA. The combination leads to uses as a surfactant and softening agent. The resulting mixture is then distilled. This article is based on scientific evidence, written by experts and fact checked by our trained editorial staff. We rank the benefit-rich avocado as one of the top five healthiest ... There’s a good chance you’ve heard of them and an even better ... There’s good reason that canned pumpkin is considered by many to be ... “MCT,” a healthy type of saturated fatty acid, has been linked to ... Homemade Lotion With Frankincense and Lavender Oils, Apple Cider Vinegar Benefits and Uses (30! Canned Pumpkin: Is It Really Pumpkin & Is It Good for You? [11] Stearic acid is used as a negative plate additive in the manufacture of lead-acid batteries. Fats and oils rich in stearic acid are more abundant in animal fat (up to 30%) than in vegetable fat (typically <5%). Most recipes will call for water, oils and an emulsifier (such as SA) to create a stable and smooth product. It’s present in humans, animals and some plants. Commercially obtained octadecanoic acid is usually a mixture of palmitic acid and stearic. It’s considered safe for most people and easy to tolerate, even for aged skin and when worn in the sun. Stearic acid is used mostly in the manufacture of soaps, detergents, and several other cosmetics such as shaving creams and shampoos. Because of its waxy texture, SA acts as an emulsifier of ingredients used in supplements and as a lubricant to fill capsules when dry powdered ingredients are used. 30 Gluten-Free Recipes Boca Raton: CRC Press, 2007. In view of the soft texture of the sodium salt, which is the main component of soap, other salts are also useful for their lubricating properties. Stearates are the salts or esters of stearic acid. Stearic acid is a natural fatty acid that appears as a waxy, yellow-white substance. ), Detox Your Liver: Try My 6-Step Liver Cleanse, What Are Legumes Good For? Learn more about the physical and chemical properties of Stearic acid (C18H36O2) from the experts at BYJU’S.
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