Calcium acetate obtained from TUMS, dried
| IUPAC name
| Other names
Acetate of lime
|Molar mass||158.17 g/mol|
|Appearance||Colorless to white hygroscopic crystals|
|Odor||Slight acetic acid odor|
|Melting point||160 °C (320 °F; 433 K) (decomposes)|
| 37.4 g/100 mL (0 °C)|
34.7 g/100 mL (20 °C)
29.7 g/100 mL (100 °C)
|Solubility|| Slightly soluble in methanol, hydrazine|
Insoluble in acetone, ethanol, benzene, toluene
|Safety data sheet||Macron Fine Chemicals|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
|4280 mg/kg (oral, rat)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
- Ca(CH3COO)2 → (CH3)2CO + CaCO3
It is also a rather reactive, soluble calcium salt. Treatment of anhydrous calcium acetate with concentrated sulfuric acid produces insoluble calcium sulfate and glacial acetic acid, a useful reagent. Calcium acetate will also gel many alcohols if mixed in correct proportions. Too much calcium acetate will revert the gel back to a liquid.
Calcium acetate in pure form is a white powder that readily absorbs water to form a translucent, crystalline monohydrate. It can be redried to the anhydrous form with heating, but calcium acetate is one of few ionic salts that can burn on its own, so open flames and very high temperatures will ruin the product.
Not only is this chemical commonly sold as a 'hot ice' substitute, it can be made from calcium carbonate or calcium hydroxide and acetic acid. Avoid using calcium oxide (quicklime) as the neutralization reaction is too exothermic and the mixture may boil.
- 2 CH3COOH + CaCO3 → Ca(CH3COO)2 + H2O + CO2
- 2 CH3COOH + Ca(OH)2 → Ca(CH3COO)2 + 2 H2O
- Make glacial acetic acid
- Make acetic anhydride
- Dry-distill acetone
- Make flaming jelly
- California Snowballs
Calcium acetate can be considered mostly harmless. It is, though, a soluble calcium salt, and large oral doses could be harmful.
Calcium acetate should be stored in sealed bottles, to keep in anhydrous. The hydrated form can be stored in any bottle or container.
As it has low toxicity, it can be safely poured down the drain or dumped in the trash.