Aluminium Hydroxide Dried Gel Formula Al ( OH) 3 Molecular Weight 78.00 Used to restrain the use of stomach acid class of materials used drugs, often used as a compound such as aluminum-dimensional U belladonna capsules, tablets, and other major groups of aluminum hydroxide were also used for medicinal materials. Properties: White powder, odorless and tasteless. Insoluble in water and ethanol, soluble in dilute mineral acids such as hydrochloric acid. Main control indicator: acid strength: not less than 230ml / g, content: aluminum oxide by not less than 48.0% ( by not less than aluminum hydroxide 76.5% ) . Quality Standard: Chinese Pharmacopoeia BP2005 Version / USP30 version USA.