1.0 2010-04-08 22:09:14 UTC 2025-11-18 23:21:12 UTC FDB010659 Ammonium alum It is used in foods as a buffer and neutralizing agent Ammonium alum (NH4Al(SO4)2·12H2O) or ammonium aluminium sulfate dodecahydrate is a white crystalline double sulfate of aluminium, used in water purification, in vegetable glues, in porcelain cements, in natural deodorants and in tanning, dyeing and in fireproofing textiles.; The pH of the solution resulting from the topical application of ammonium alum with perspiration is typically in the slightly acid range, from 4 to 5. It is a popular deodorant because of its high availability and low cost[citation needed]. A 120 gram stone lasts for at least a year of daily usage - much longer than other deodorants and antiperspirants. It is also hypoallergenic and non-staining[citation needed]. Potassium alum is also used for this purpose. Alum, ammonium Alum, ammonium (usp) Aluminum ammonium bis(sulfate) dodecahydrate Aluminum ammonium disulfate dodecahydrate Aluminum ammonium sulfate Aluminum ammonium sulfate (1:1:2) dodecahydrate Aluminum ammonium sulfate (Al(NH4)(SO4)2) dodecahydrate Aluminum ammonium sulfate dodecahydrate Ammonia alum Ammonium alum Ammonium alum (NH4Al(SO4)2.12H2O) Ammonium aluminum disulfate dodecahydrate Ammonium aluminum sulfate dodecahydrate Ammonium aluminum sulfate hydrate Monoaluminum monoammonium disulfate dodecahydrate AlH28NO20S2 453.329 453.046147162 aluminium(3+) ion ammonium dodecahydrate disulfate aluminium(3+) ion ammonium dodecahydrate disulfate 7784-26-1 [NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O InChI=1S/Al.H3N.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;1H3;2*(H2,1,2,3,4);12*1H2/q+3;;;;;;;;;;;;;;;/p-3 WZUKKIPWIPZMAS-UHFFFAOYSA-K belongs to the class of inorganic compounds known as post-transition metal sulfates. These are inorganic compounds in which the largest oxoanion is sulfate, and in which the heaviest atom not in an oxoanion is a post-transition metal. Post-transition metal sulfates Inorganic compounds Mixed metal/non-metal compounds Post-transition metal oxoanionic compounds Post-transition metal sulfates Inorganic oxides Inorganic salts Post-transition metal salts Inorganic oxide Inorganic post-transition metal salt Inorganic salt Post-transition metal sulfate logp -0.84 ChemAxon pka_strongest_acidic -3 ChemAxon iupac aluminium(3+) ion ammonium dodecahydrate disulfate ChemAxon average_mass 453.329 ChemAxon mono_mass 453.046147162 ChemAxon smiles [NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ChemAxon formula AlH28NO20S2 ChemAxon inchi InChI=1S/Al.H3N.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;1H3;2*(H2,1,2,3,4);12*1H2/q+3;;;;;;;;;;;;;;;/p-3 ChemAxon inchikey WZUKKIPWIPZMAS-UHFFFAOYSA-K ChemAxon polar_surface_area 80.26 ChemAxon refractivity 11.53 ChemAxon polarizability 5.81 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 4 ChemAxon donor_count 0 ChemAxon physiological_charge -2 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 102456 Specdb::MsMs 102457 Specdb::MsMs 102458 Specdb::MsMs 168270 Specdb::MsMs 168271 Specdb::MsMs 168272 HMDB32701