822-16-2 Usage
Description
Sodium stearate, the sodium salt of stearic acid, is a versatile white solid that serves various functions across different industries. It is commonly found in solid deodorants, rubbers, latex paints, inks, and even as a component of some food additives and flavorings. Its unique properties allow it to act as a binder, emulsifier, and anticaking agent, making it a valuable ingredient in numerous applications.
Uses
Used in Cosmetic Formulations:
Sodium stearate is used as a stabilizer for emulsions like lotions, making products thicker and more viscous. Its effectiveness in stabilizing emulsions makes it a popular choice in the cosmetic industry.
Used in Deodorant Production:
Sodium stearate serves as a major constituent of soap produced by the saponification of oils and fats, making it widely used in the deodorant industry.
Used in Paint and Ink Production:
Sodium stearate is applied in the production of latex paints and inks, contributing to their quality and performance.
Used in Rubber Industry:
As a component in rubber production, sodium stearate enhances the properties and performance of rubber products.
Used in Food Additives and Flavorings:
Sodium stearate is also found in some food additives and flavorings, where it plays a role in improving texture and stability.
Used as a Plasticizer in Chewing Gum Base:
Sodium stearate functions as a plasticizer in chewing gum base, providing the desired consistency and texture.
Used in Pharmaceutical Industry:
In the pharmaceutical industry, sodium stearate is used as a surfactant to aid the solubility of hydrophobic compounds in the production of various mouth foams.
Used as a β-Lactamase Inhibitor:
Sodium stearate can also function as a β-lactamase inhibitor, playing a role in the effectiveness of certain antibiotics.
Used as a Pharamaceutic Aid:
Sodium stearate acts as an emulsifying and stiffening agent in pharmaceutical formulations, such as glycerol suppositories and toothpaste.
Used as a Waterproofing Agent:
Sodium stearate is a fatty acid used as a waterproofing agent, and it is one of the least allergy-causing sodium salts of fatty acids, making it non-irritating to the skin.
References
https://en.wikipedia.org/wiki/Sodium_stearate
http://www.tomsofmaine.com/ingredients/overlay/sodium-stearate
https://www.reference.com/science/uses-sodium-stearate-d24da30b6b85aa51#
Production Methods
Sodium stearate is produced as a major component of soap upon saponification of oils and fats. The percentage of the sodium stearate depends on the ingredient fats. Tallow is especially high in stearic acid content (as the triglyceride), whereas most fats only contain a few percent. The idealized equation for the formation of sodium stearate from stearin (the triglyceride of stearic acid) follows : (C18H35O2)3C3H5 → C3H5(OH)3 + 3 C17H35CO2Na Purified sodium stearate can be made by neutralizing stearic acid with sodium hydroxide.
Safety Profile
Poison by intravenous route. When heated to decomposition it emits toxic fumes of Na2O.
Purification Methods
It is better to prepare it by adding a slight excess of octadecanoic acid to ethanolic NaOH, evaporating and extracting the residue with dry Et2O. [Beilstein 2 III 1003.]
Check Digit Verification of cas no
The CAS Registry Mumber 822-16-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,2 and 2 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 822-16:
(5*8)+(4*2)+(3*2)+(2*1)+(1*6)=62
62 % 10 = 2
So 822-16-2 is a valid CAS Registry Number.
InChI:InChI=1/C18H36O2.Na/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2-17H2,1H3,(H,19,20);/q;+1/p-1
822-16-2Relevant articles and documents
Cation Distribution Assisted Tuning of Magnetization in Nanosized Magnesium Ferrite
Thanh, Nguyen Kim,Loan, To Thanh,Duong, Nguyen Phuc,Anh, Luong Ngoc,Nguyet, Dao Thi Thuy,Nam, Nguyen Huu,Soontaranon, Siriwat,Klysubun, Wantana,Hien, Than Duc
, (2018)
The MgFe2O4 nanoparticles are synthesized by combustion method and annealed at different temperatures from 500 to 1000 °C. Magnetic properties, morphology, valence states of iron, crystal structure, and microstructure of the samples
Adsorption of Anions of Higher Carboxylic Acids on Magnesium from Weakly Alkaline Aqueous Solutions
Andreeva, N. P.,Chirkunov, A. A.,Kuznetsov, Yu. I.,Luchkin, A. Yu.,Ogorodnikova, V. A.
, p. 1104 - 1110 (2020/06/08)
Abstract: The adsorption of sodium salts of higher carboxylates on oxidized magnesium is studied via in situ reflective ellipsometry. It is shown that the free energies of adsorption of sodium oleyl sarcosinate (OsS) and sodium linoleate (LiS) is >55 kJ/mol, indicating the chemisorption of carboxylates on oxidized magnesium surfaces. Electrochemical impedance spectra, voltammetry, and corrosion testing show that sodium oleate (OlS) has the best protective properties on pure and oxidized magnesium. The strong protective properties of OlS are confirmed by Mg plate testing under conditions of a wet atmosphere with daily condensation. Tentative passivation of chemically oxidized Mg in a 16 mmol/L OlS solution protects against corrosion for 92–96 h.
Sodium stearate and continuous production process and production line thereof
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Paragraph 0040-0046, (2017/06/03)
The invention discloses sodium stearate and a continuous production process and production line thereof. The production process includes: preparing materials: stearic acid, tablet sodium hydroxide and a catalyst; closing a channel valve, adding the materials from a feed port, mixing well the materials, and charging a mixture into a reaction cylinder through the channel valve; closing the channel valve of the reaction cylinder, keeping a certain level of pressure in the reaction cylinder, and heating to obtain a semi-finished product; measuring pH value of the semi-finished product, starting a pressure regulator, and starting a heating device to distill water under reduced pressure; crushing the obtained dry sodium stearate into micro-particles, and automatically packaging to obtain the finished stearate; the continuous production line comprises a feeding cylinder, a reaction cylinder, a separating cylinder and a packaging unit that are connected in sequence. The continuous production process is used for the sodium stearate, the target product with high purity and quality is prepared, the requirement for batch continuous production is met, and production cost is further reduced.
