Packaging and storage—
Preserve in tight containers, and protect from freezing.
Identification—
Dilute a volume of Magma, equivalent to about 1 g of dihydroxyaluminum aminoacetate, with water to 25 mL, add hydrochloric acid, dropwise, until a solution results, and then filter: the filtered solution responds to the
Identification tests under
Dihydroxyaluminum Aminoacetate.
Microbial limits 
61
—
The total bacterial count does not exceed 100 cfu per mL, and the test for
Escherichia coli is negative.
Acid-neutralizing capacity 301—
Not less than 5 mEq of acid is consumed by the minimum single dose recommended in the labeling, and not less than the number of mEq calculated by the formula:
0.8(0.0148D),
in which 0.0148 is the theoretical acid-neutralizing capacity, in mEq, of C
2H
6AlNO
4, and
D is the quantity, in mg, of C
2H
6AlNO
4 in the specimen tested, based on the labeled quantity.
pH 791:
between 6.5 and 7.5, in a dilution in water, equivalent to about 1 g of dihydroxyaluminum aminoacetate in 25 mL.
Assay—
Edetate disodium titrant—
Prepare and standardize as directed in the
Assay under
Ammonium Alum.
Procedure—
[NOTE—Shake the container by mechanical means for 1 hour before removing the specimen.
] Weigh accurately in a tared beaker a quantity of Dihydroxyaluminum Aminoacetate Magma, equivalent to about 2.5 g of dihydroxyaluminum aminoacetate, add 15 mL of hydrochloric acid, and boil gently for about 5 minutes. Cool, transfer the solution with the aid of water to a 500-mL volumetric flask, dilute with water to volume, mix, and filter, if necessary, to obtain a clear solution. Proceed as directed in the
Assay under
Dihydroxyaluminum Aminoacetate, beginning with “Transfer 20.0 mL of this solution.”
