CAS number: 41354-48-7
Molecular Weight: 135.1
Chemical Formula: C2H6AlNO4-xH2O
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Aluminium Glycinate BP Grade
CAS Number: 41354-48-7
Action and use: Antacid.
Aluminium Glycinate is a basic aluminium monoglycinate, partly hydrated. It contains not less than 34.5% and not more than 38.5% of Al2O3 and not less than 9.9% and not more than 10.8% of N, both calculated with reference to the dried substance.
A white or almost white powder.
Practically insoluble in water and in organic solvents. It dissolves in dilute mineral acids and in aqueous solutions of the alkali hydroxides.
A. Add 0.1 g to 10 ml of a solution prepared by dissolving 0.84 g of citric acid in 8 ml of 1M sodium hydroxide and diluting to 20 ml with water. Add 0.5 ml of a 0.1% w/v solution of ninhydrin in methanol and warm. A purple colour is produced.
B. Suspend 1 g in 25 ml of 0.5M hydrochloric acid and heat gently until a clear solution is produced. Reserve half of the solution. To 2 ml of the solution add 0.15 ml of liquefied phenol , shake and add carefully without shaking 5 ml of dilute sodium hypochlorite solution. A blue colour is produced.
C. The solution reserved in test B yields the reaction characteristic of aluminium salts.
Acidity or alkalinity: pH of a suspension of 1 g in 25 ml of carbon dioxide-free water, 6.5 to 7.5.
Neutralising capacity: Shake 0.2 g vigorously with 25 ml of 0.1M hydrochloric acid for 5 minutes and allow to stand for 5 minutes. The pH of the mixture is greater than 3.0.
Arsenic: Dissolve 2.0 g in 18 ml of brominated hydrochloric acid and 32 ml of water. 25 ml of the resulting solution complies with the limit test for arsenic, 1 ppm.
Heavy metals: Dissolve 1.5 g in 20 ml of 2M hydrochloric acid and 10 ml of water, add 0.5 ml of nitric acid and boil for about 30 seconds. Cool, add 2 g of ammonium chloride and 2 g of ammonium thiocyanate and extract with two 10 ml quantities of a mixture of equal parts of isoamyl alcohol and ether . To the aqueous layer add 2 g of citric acid. 12 ml of the resulting solution complies with limit test A for heavy metals, Appendix VII. Use lead standard solution (1 ppm Pb) to prepare the standard (20 ppm).
Mercuric salts: To pass the test.
Chloride: Dissolve 1.0 g in 10 ml of 2M nitric acid and dilute to 100 ml with water. 15 ml of the resulting solution complies with the limit test for chlorides, Appendix VII (330 ppm).
Loss on drying: When dried to constant weight at 130C, loses not more than 12.0% of its weight. Use 1 g.
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