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Nov 17, 2023 · The impurities test procedure for sodium hydroxide, along with the assay and impurities tests for Potassium Hydroxide were formally validated by the USP-India lab. Based on these successful validations, USP decided to introduce these procedures in the official Sodium Hydroxide and Potassium Hydroxide monographs.
Major impurities which are normally tested for are sodium chloride, sodium carbonate, sodium sulfate, sodium chlorate, iron, and nickel. Kirk-Othmer Encyclopedia of Chemical Technology. 4th ed. Volumes 1: New York, NY.
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Sodium hydrate 1.2 PURITY/IMPURITIES, ADDITIVES Sodium hydroxide (NaOH) is a white and deliquescent solid. Impurities are sodium chloride (≤ 2%), sodium carbonate (≤ 1.0%) and sulfate (≤ 0.2%). The concentration of other impurities is less than 0.1%. 1.3 PHYSICO-CHEMICAL PROPERTIES Table 1.1 Summary of physico-chemical properties
As one of the simplest hydroxides, sodium hydroxide is frequently used alongside neutral water and acidic hydrochloric acid to demonstrate the pH scale to chemistry students. [12] Sodium hydroxide is used in many industries: in the making of wood pulp and paper, textiles, drinking water, soaps and detergents, and as a drain cleaner.
Test methods, based on both AAS and ICP-OES techniques, have been validated for Sodium Hydroxide and Potassium Hydroxide Assay and Impurity testing. Therefore, either method can be selected. The proposal contains ICP-OES methods for the determination of Content of Sodium in Sodium Hydroxide and Content of Potassium in Potassium Hydroxide.
Carbonate impurities in caustic soda. Robust IC analysis of carbonate in sodium hydroxide. Summary. Sodium hydroxide (NaOH, also known as caustic soda or soda lye) is a strong, harmful base made of solid white crystals.
) NMT 3.0% <0.1% Inorganic Impurities – Lead NMT 2 mg/kg 1 mg/kg Inorganic Impurities – Mercury NMT 0.1 mg/kg 0.05 mg/kg Form: Sodium Hydroxide 50%, Reagent (FCC), #201, Rev. 2.7, 11/17, EF .
