Difference between revisions of "Aluminum ammonium sulfate"
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ammonia alum; ammonium aluminum sulfate; alum NF; aluminum ammonium sulphate (Br.); tschermigite | ammonia alum; ammonium aluminum sulfate; alum NF; aluminum ammonium sulphate (Br.); tschermigite | ||
| − | == | + | == Risks == |
| − | Soluble in water, glycerol. Insoluble in ethanol. Crystals are fibrous and deliquescent | + | * 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 == | ||
| + | |||
| + | * Soluble in water, glycerol. Insoluble in ethanol. | ||
| + | * Crystals are fibrous and deliquescent | ||
{| class="wikitable" | {| class="wikitable" | ||
| Line 20: | Line 26: | ||
|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 94.5 | + | | 94.5 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 1.645 | + | | 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 | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 33 | ||
Latest revision as of 10:10, 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