Ammonium Chloride

Synonyms: Sal Ammoniac, Cloruro de Amonio, Cloruro Amonico CAS No.: 7646-85-7, Molecular Weight: 53.5, Chemical Formula: NH4Cl Ammonium Chloride IPDescription: Colorless crystals or white crystalline powder. Solubility: Freely soluble in water; sparingly soluble in ethanol. Assay: Content not less than 99% and not more than 100.5% of NH4Cl calculated on dry basis. Clarity and color of solution: A 10% w/w solution is clear & colorless. pH of 5% solution: 4.5 to 6.0. Arsenic: 4 ppm maximum Heavy Metals: 10 ppm maximum. Magnesium & alkali salts: 1% maximum Iron: 20 ppm maximum Sulfate: 150 ppm maximum Sulfated ash: 0.1% maximum Calcium: 200 ppm maximum Thiocyanate: To pass the test Loss on drying @105C: 1% maximum Ammonium Chloride USP NH4Cl 53.49 Assay— Ammonium Chloride contains not less than 99.5 percent and not more than 100.5 percent of NH4Cl, calculated on the dried basis. Packaging and storage— Preserve in tight containers. Identification— A solution (1 in 10) responds to the tests for Ammonium and for Chloride pH: between 4.6 and 6.0, in a solution (1 in 20). Loss on drying— Dry it over silica gel for 4 hours: it loses not more than 0.5% of its weight. Residue on ignition— Add 1 mL of sulfuric acid to about 2 g, accurately weighed, and heat the mixture gently until volatilization is complete: the residue is white, and when ignited, not more than 0.1% of nonvolatile substance remains. Limit of thiocyanate— Acidify 10 mL of a solution (1 in 10) with hydrochloric acid, and add a few drops of ferric chloride TS: no orange-red color is produced. Heavy metals: 0.001%. Ammonium Chloride BP NH4Cl DEFINITION Content or Assay 99.0 per cent to 100.5 per cent (On dried substance basis). CHARACTERS Appearance White or almost white, crystalline powder or colorless crystals. Solubility Freely soluble in water. IDENTIFICATION A. It gives the reactions of chlorides. B. 10 ml of solution giv...