Difference between pages "Aluminum acetate" and "Aluminum ammonium sulfate"

Latest revision as of 11:10, 26 April 2022

Description

A white crystalline powder that is also called ammonium alum. Aluminum ammonium sulfate occurs naturally as the mineral tschermigite. It is used in baking powders, dyeing textiles, tanning leathers, and as a substrate for lake pigments. Ammonia alum is also used in developing baths for black and white photographs.

Synonyms and Related Terms

ammonia alum; ammonium aluminum sulfate; alum NF; aluminum ammonium sulphate (Br.); tschermigite

Risks

Skin contact may cause allergies.
ThermoFisher: SDS

Physical and Chemical Properties

Soluble in water, glycerol. Insoluble in ethanol.
Crystals are fibrous and deliquescent

Composition	AlNH4(SO4)2-12H2O
Mohs Hardness	1.5-2.0
Melting Point	94.5 C
Density	1.645 g/ml

Resources and Citations

Web Minerals: Tschermigite

G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 33

Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993

Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979

John and Margaret Cannon, Dye Plants and Dyeing, Herbert Press, London, 1994

The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 335

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 == Description ==
-A white precipitate formed by the reaction of [[aluminum%20hydroxide|aluminum hydroxide]] and [[acetic%20acid|acetic acid]]. Basic aluminum acetate is used as a lake substrate and as a mordant in textile dyeing. It also functions as a flame retardant and waterproofing agent. An aqueous solution of 5% neutral aluminum acetate (Burow's solution) is used as an astringent and antiseptic.
+A white crystalline powder that is also called ammonium alum. Aluminum ammonium sulfate occurs naturally as the mineral tschermigite.  It is used in baking powders, dyeing textiles, tanning leathers, and as a substrate for lake pigments. Ammonia alum is also used in developing baths for black and white photographs.
 == Synonyms and Related Terms ==
-mordant rouge; Burow's solution; red acetate
+ammonia alum; ammonium aluminum sulfate; alum NF; aluminum ammonium sulphate (Br.); tschermigite
+== Risks ==
+* Skin contact may cause allergies.
+* ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=AC206260050&productDescription=ALUMINUM+AMMONIUM+SULFATE+D+5G&vendorId=VN00032119&countryCode=US&language=en SDS]
 == Physical and Chemical Properties ==
-* Neutral aluminum acetate (Al(C2H3O2)3) is soluble in water
+* Soluble in water, glycerol. Insoluble in ethanol.
-* Basic aluminum acetate (Al(C2H3O2)2OH) is insoluble in water
+* Crystals are fibrous and deliquescent
+{| class="wikitable"
+|-
+! scope="row"| Composition
+| AlNH4(SO4)2-12H2O
+|-
+! scope="row"| Mohs Hardness
+| 1.5-2.0
+|-
+! scope="row"| Melting Point
+| 94.5 C
+|-
+! scope="row"| Density
+| 1.645 g/ml
+|}
 ==Resources and Citations==
+* Web Minerals: [http://webmineral.com/data/tschermigite.shtml Tschermigite]
+* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 33
 * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
-* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 332
+* Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979
+* John and Margaret Cannon, ''Dye Plants and Dyeing'', Herbert Press, London, 1994
+* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 335
 [[Category:Materials database]]