Ammonium Alum, Aluminium Ammonium Sulphate, Aluminum Ammonium Sulfate USP FCC ACS Manufacturers, AlNH4(SO4)2 |
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Ammonium Alum
Technical & Pure Crystals, Aluminum Ammonium Sulfate
Also IP BP Ph. Eur. USP ACS AR LR FCC Food Grades
Ammonium Alum USP
Aluminum ammonium sulfate
BP
AlNH4(SO4)2·12H2O 453.33
Sulfuric acid, aluminum
ammonium salt (2:1:1), dodecahydrate.
Aluminum ammonium sulfate
(1:1:2) dodecahydrate [7784-26-1].
Anhydrous 237.15 [7784-25-0].
Ammonium Alum contains not
less than 99.0 percent and not more than 100.5 percent of AlNH4(SO4)2,
calculated on the dried basis.
Identification—
A:
Add 1 N sodium
hydroxide drop wise to a solution of it (1 in 20): a precipitate is formed,
and it dissolves in an excess of the reagent with the evolution of ammonia,
recognizable by its odor and by its alkaline effect upon moistened red
litmus paper exposed to the vapor.
B:
A solution (1 in
20) responds to the tests for Aluminum and for Sulfate.
Loss on drying— Transfer 2.0 g, in a tarred porcelain crucible, to a muffle furnace at 200.
Increase the temperature to 300 , and dry at 300 to constant weight. Cool in
a desiccator, and weigh: it loses between 45.0% and 48.0% of its weight.
Limit of alkalies and
alkaline earths— Completely precipitate the aluminum from a boiling
solution of 1 g of it in 100 mL of water by the addition of sufficient 6 N
ammonium hydroxide to render the solution distinctly alkaline to methyl red
TS, and filter. Evaporate the filtrate to dryness, and ignite: the weight of
the residue does not exceed 5 mg (0.5%).
Heavy metals— Dissolve 1 g in water to make 20 mL, and add 5 mL of 0.1 N hydrochloric
acid. Evaporate the solution in a porcelain evaporating dish to dryness.
Treat the residue with 20 mL of water, and add 50 mg of hydroxylamine
hydrochloride. Heat the solution on a steam bath for 10 minutes, cool,
dilute with water to 25 mL, and proceed as directed, except to add 50 mg of
hydroxylamine hydrochloride to the Standard Preparation : the limit
is 0.002%.
Iron—
Add 5 drops
of potassium ferrocyanide TS to 20 mL of a solution (1 in 150): no blue
color is produced immediately.
Aluminum Ammonium Sulfate FCC
AlNH4(SO4)2·12H2O Formula
wt 453.32
INS: 523 CAS: [7784-25-0]
DESCRIPTION
Aluminum Ammonium Sulfate
or Ammonium Alum occurs as large, colorless crystals, white granules, or a powder. One gram
dissolves in 7 mL of water at 25° and in about 0.3 mL of boiling water.
Solutions are acid to litmus. It is insoluble in alcohol, and is freely, but
slowly, soluble in glycerin.
Function
Buffer;
neutralizing agent.
REQUIREMENTS
Identification
A
1:20 aqueous solution gives positive tests for Aluminum, for Ammonium, and for
Sulfate.
Assay: Not less than
99.5% and not more than 100.5% of AlNH4(SO4)2-12H2O.
Alkalies and Alkaline
Earths: Passes test.
Fluoride: Not more
than 0.003%.
Lead: Not more than
3 mg/kg.
Selenium: Not more
than 0.003%.
Aluminum Ammonium Sulfate Dodecahydrate ACS
American Chemical Society Reagent Grade
Ammonium AlumAlNH4(SO4)2 . 12H2O
Formula Wt 453.33
CAS Number 7784-26-1
REQUIREMENTS
Assay 98.0-102.0% AlNH4(SO4)2 .
12H2O
MAXIMUM ALLOWABLE
Insoluble matter: 0.005%
Chloride (Cl): 0.001%
Heavy metals (as Pb): 0.001%
Calcium (Ca): 0.05%
Iron (Fe): 0.001%
Potassium (K): 0.05%
Sodium (Na): 0.01%
Ammonium Alum Aluminum Ammonium Sulfate Sulphate USP FCC Food Grade ACS Manufacturers:
Muby Chem Ltd.
Toll manufacturing & Warehouse at Houston & Midland, Texas, USA and India
USA, Canada, Mexico Customers may e-mail: usa@mubygroup.com
Call 1-844-682-9243
Europe Africa Asia India Mumbai e-mail: info@mubygroup.com
Call +91-22-23774610
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