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This colorless deliquescent salt has a wide range of uses. Sodium acetate is used as the carbon source for culturing bacteria. Sodium acetate is also useful for increasing yields of DNA isolation by ethanol precipitation. Sodium acetate is used in the textile industry to neutralize sulfuric acid waste streams and also as a photoresist while using aniline dyes. It is also a pickling agent in chrome tanning and helps to impede vulcanization of chloroprene in synthetic rubber production. In processing cotton for disposable cotton pads, sodium acetate is used to eliminate the buildup of static electricity. Sodium acetate is used to mitigate water damage to concrete by acting as a concrete sealant , while also being environmentally benign and cheaper than the commonly used epoxy alternative for sealing concrete against water permeation. As the conjugate base of acetic acid , a solution of sodium acetate and acetic acid can act as a buffer to keep a relatively constant pH level. This is useful especially in biochemical applications where reactions are pH-dependent in a mildly acidic range pH 4—6. Sodium acetate is also used in heating pads , hand warmers , and hot ice. Sodium acetate trihydrate crystals melt at When they are heated past the melting point and subsequently allowed to cool, the aqueous solution becomes supersaturated. This solution is capable of cooling to room temperature without forming crystals. By pressing on a metal disc within the heating pad, a nucleation center is formed, causing the solution to crystallize back into solid sodium acetate trihydrate. The bond-forming process of crystallization is exothermic. For laboratory use, sodium acetate is inexpensive and usually purchased instead of being synthesized. Any of these reactions produce sodium acetate and water. When a sodium and carbonate ion-containing compound is used as the reactant, the carbonate anion from sodium bicarbonate or carbonate, reacts with hydrogen from the carboxyl group -COOH in acetic acid, forming carbonic acid. Carbonic acid readily decomposes under normal conditions into gaseous carbon dioxide and water. This is the reaction taking place in the well-known 'volcano' that occurs when the household products, baking soda and vinegar, are combined. Industrially, sodium acetate trihydrate is prepared by reacting acetic acid with sodium hydroxide using water as the solvent. Sodium acetate can be used to form an ester with an alkyl halide such as bromoethane :. Sodium acetate undergoes decarboxylation to form methane CH 4 under forcing conditions pyrolysis in the presence of sodium hydroxide :. Caesium salts catalyze this reaction. From Wikipedia, the free encyclopedia. This article is about sodium acetate. For other uses of hot ice, see Hot ice disambiguation. Sodium ethanoate. Hot ice sodium acetate trihydrate. CAS Number. Beilstein Reference. Gmelin Reference. PubChem CID. Chemical formula. Solubility in water. Refractive index n D. Crystal structure. Heat capacity C. Std molar entropy S o ATC code. Autoignition temperature. LD 50 median dose. International Chemical Safety Cards. National Institute of Occupational Safety and Health. Solubilities of Inorganic and Organic Compounds. Van Nostrand. Retrieved on Organic Chemistry 1st ed. Oxford University Press. Science Daily. Journal of Chemical Education. April Retrieved Sodium compounds. Acetyl halides and salts of the acetate ion. Namespaces Article Talk. Views Read Edit View history. In other projects Wikimedia Commons. By using this site, you agree to the Terms of Use and Privacy Policy. Other names Hot ice sodium acetate trihydrate. EC Number. E number. Solubility in methanol. Solubility in ethanol. Solubility in acetone. Acidity p K a. Basicity p K b. Main hazards. External MSDS. Lethal dose or concentration LD, LC :. Other anions. Sodium formate Sodium propionate. Other cations. Potassium acetate Calcium acetate. Wikimedia Commons has media related to Sodium acetate. Chemical formulas. B OAc 3. Sc OAc 3. Ti OAc 4. VO OAc 3. Ga OAc 3. As OAc 3. Sr OAc 2. Y OAc 3. Zr OAc 4. Rh 2 OAc 4. La OAc 3. Ce OAc x. Sm OAc 3. Eu OAc 3. Gd OAc 3. Dy OAc 3. Ho OAc 3. Yb OAc 3. Lu OAc 3.

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