Aluminum
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
Al At. Wt. 26.98154 CAS RN: 7429-90-5.—Use ACS reagent grade, which also meets the requirements of the following test.
Arsenic: Place 750 mg in a generator bottle (see Arsenic in Reagents under General Tests for Reagents), omitting the pledget of cotton. Add 10 mL of water and 10 mL of sodium hydroxide solution (3 in 10), and allow the reaction to proceed for 30 minutes: not more than a barely perceptible stain is produced on the mercuric bromide test paper.
