Chrome alum
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| Names | |
|---|---|
| IUPAC name
Chromium potassium sulfate
| |
| Other names
Chromium alum
| |
| Properties | |
| KCr(SO4)2 (anhydrous) KCr(SO4)2 · 12 H2O (dodecahydrate) | |
| Appearance | Purple to black crystals (dodecahydrate) |
| Odor | Odorless |
| Density | 2.657 g/cm3 (20 °C, anhydrous)[1] 1.826 g/cm3 (25 °C, dodecahydrate)[2] |
| Melting point | 75–90 °C (167–194 °F; 348–363 K) (with decomposition) |
| Anhydrous Insoluble Dodecahydrate 208.5 g/L (18 °C, 19 h)[3] 225.8 g/L (18 °C, 14 d)[3] 282.2 g/L (18 °C, 97 d)[3] | |
| Solubility | Reacts with bases >100 g/L in glycerol Insoluble in 70% ethanol Soluble in mineral acids |
| Vapor pressure | ~0 mmHg |
| Hazards | |
| Safety data sheet | [1] (hydrate) |
| Flash point | Non-flammable |
| Related compounds | |
| Related compounds
|
Chromium(III) sulfate |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
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Contents
Properties
Chemical
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Physical
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Availability
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Preparation
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Projects
- Grow crystals
Handling
Safety
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Storage
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Disposal
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References
- ↑ F. Kraus, A. Fricke, H. Querengässer, Z. anorg. Ch. 1929, 181, 38-54. Cited in: Gmelins Handbuch der Anorganischen Chemie, Chrom Teil B, 8th edition 1962, p. 604
- ↑ H. P. Klug, J. Am. Soc 1940, 62, 2992-2993
- ↑ 3.0 3.1 3.2 C. Montemartini, E. Vernazza, Ind. chim. 1933, 8, 445-446. Cited in: Gmelins Handbuch der Anorganischen Chemie, Chrom Teil B, 8th edition 1962, p. 606
