Calcium acetate
- Calciumethanoat ( IUPAC )
- Calcium acetate
- Calciumdiacetat
- E 263
- 62-54-4 (anhydrous)
- 114460-21-8 ( hydrate)
A12AA12
Colorless solid
Fixed
2.34 g · cm -3
Decomposition: 160 ° C
Readily soluble in water ( 374 g · l -1)
Attention
4280 mg · kg -1 ( LD50, rat, oral)
Template: Infobox chemical / molecular formula search available
Calcium (E 263 ) is a chemical compound having the chemical formula Ca ( H3CCOO ) 2 It is a calcium salt of acetic acid. It is a white solid with a slight odor of acetic acid and strong bitter taste.
In the delivery form calcium contains varying amounts of water of crystallization. Under normal conditions (room temperature, 65 % humidity ), the compound with about 2 moles of crystal water resistant. At 60 ° C, the compound dissolves in its own water of crystallization, which is equivalent to melting. Calcium is an intermediate in the production of acetone from calcium acetate and acetic acid with the so-called " Kalksalzdestillation " since it, among other things by heating decomposes into acetone.
Use
Calcium acetate is used as an acid- regulating, preservative and firming food additive. It is in the EU as a food additive under the E number 263 without a maximum limit ( quantum satis ) approved for all food additives approved for.
Calcium acetate is often used as the extraction agent for soil samples. It is also used in combination with denatured alcohol as fuel paste.
In addition, it is used as a medicine to treat high phosphate levels in chronic renal failure in nephrology.
The heating pads available in many places contain a calcium or sodium acetate. By deformation of the metal plate creates a nucleation. After a few seconds, the whole is crystallized acetate, there is a significant period of crystallization, the resulting heat. The duration is primarily on the size of the thermal pad ( ratio of volume to surface area ) and the ambient temperature.