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| Calcium acetate | |
|---|---|
| Names: | calcium acetate calcium diacetate calcium ethanoate lime acetate acetate of lime lime pyrolignite brown acetate grey acetate Е263 food additive |
| Formula: | Ca(CH3COO)2 (anhydrous) Ca(CH3COO)2 · H2O (monohydrate) |
| Molar mass: | 158.166 g/mol (anhydrous) 176.181 g/mol (monohydrate) |
| Density: | 2.34 g/cm3 (anhydrous) 1.54 g/cm3 (monohydrate) |
| Crystal system: | triclinic (monohydrate) a=6.75 Å, b=11.076 Å, c=11.782 Åα=116.49°, β=92.4°, γ=97.31° |
| Shapes: |
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| Color: | colorless |
| Melting point: | 160 °C433.15 K <br />320 °F <br />779.67 °R <br /> (monohydrate) |
| Refractive index: | 1.55 (monohydrate) |
| Magnetic properties: | diamagnetic |
| Stability: | stable (monohydrate) |
| Hardness: | very fragile |
| Toxicity: | non-toxic LD50=4280mg/kg |
Description
Organic compound, salt of alkaline earth metal calcium and organic acetic acid. From water solutions crystallizes as monohydrate.
Precursors
Reaction between calcium carbonate or hydroxide and acetic acid
Chemical equation:
100.00g of calcium acetate monohydrate а 56.81g of carbonate or 42.05g of hydroxide and 97.39g of 70% acetic acid is required.Add acid to the flask, then add small parts of calcium compound with stirring until it will totally dissolve or, if you use carbonate, until carbon dioxide emission will stop. After reaction will stop, filter the solution and use it for crystal growing.
Reaction between calcium chloride or nitrate and excess of concentrated acetic acid
Chemical equation:
100.00g of calcium acetate monohydrate а 124.35g of calcium chloride hexahydrate or 134.04g of calcium nitrate tetrahydrate and 68.17g of glacial acetic acid is required.Add to the flask with hot iron compounds solution a acid solution with heating and stirring. Cooling this mixture will cause forming a large amount of crystalline precipitate. Filter precipitate and wash it wish small amount of glacial acetic acid, then filter the solution and use it for crystal growing.
Reaction between calcium nitrate and sodium acetate
Chemical equation:
100.00g of calcium acetate monohydrate а 134.04g of calcium nitrate tetrahydrate and 154.48g of sodium acetate trihydrate is required.Add to the flask with hot calcium nitrate solution a sodium acetate solution with heating and stirring. Cooling this mixture will cause forming a large amount of crystalline precipitate. Filter precipitate and wash it wish small amount of cold water, then filter the solution and use it for crystal growing.
Storage conditions
Store in its original form or under several layers of varnish at average humidity and room temperature. Do not store in matchboxes or cotton wool and do not heat.
Solubility
| Temperature | гр/100,00 гр water | гр/100,00 гр methanol | гр/100,00 гр acetic acid | |
|---|---|---|---|---|
| (anhydrous) | (monohydrate) | (anhydrous) | (anhydrous) | |
| 0°C273.15 K <br />32 °F <br />491.67 °R <br /> | 37.4 | 48.6 | ||
| 10°C283.15 K <br />50 °F <br />509.67 °R <br /> | 36 | |||
| 15°C288.15 K <br />59 °F <br />518.67 °R <br /> | 0.75 | |||
| 20°C293.15 K <br />68 °F <br />527.67 °R <br /> | 34.7 | 0.156 | ||
| 25°C298.15 K <br />77 °F <br />536.67 °R <br /> | 39.8 | |||
| 30°C303.15 K <br />86 °F <br />545.67 °R <br /> | 33.8 | |||
| 40°C313.15 K <br />104 °F <br />563.67 °R <br /> | 33.2 | |||
| 60°C333.15 K <br />140 °F <br />599.67 °R <br /> | 32.7 | |||
| 70°C343.15 K <br />158 °F <br />617.67 °R <br /> | 1.01 | |||
| 80°C353.15 K <br />176 °F <br />635.67 °R <br /> | 33.5 | |||
| 90°C363.15 K <br />194 °F <br />653.67 °R <br /> | 31.1 | |||
| 100°C373.15 K <br />212 °F <br />671.67 °R <br /> | 29.7 | 34.5 | 2.426 | |
Gallery
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Accidentally growth of a crystal, for about a yearCalcium acetate, Ivan Postnikov, VKontakteVKontakte
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Accidentally growth of a crystal, for about a yearCalcium acetate, Ivan Postnikov, VKontakteVKontakte
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Growing with slow evaporating methodCalcium acetate, Dmitry Shintyakov, Personal blogPersonal blog
Video
Sources
| Acetates | |
|---|---|
| Salts |
Calcium acetate (Ca(CH3COO)2) • Copper(II) acetate (Cu(CH3COO)2) • Chromium(II) acetate (Cr(CH3COO)2) • Gadolinium acetate (Gd(CH3COO)3) • Dysprosium acetate (Dy(CH3COO)3) • Holmium acetate (Ho(CH3COO)3) • Iron(II) acetate (Fe(CH3COO)2) • Lead(II) acetate (Pb(CH3COO)2) • Manganese(II) acetate (Mn(CH3COO)2) • Neodymium acetate (Nd(CH3COO)3) • Nickel acetate (Ni(CH3COO)2) • Samarium acetate (Sm(CH3COO)3) • Strontium acetate (Sr(CH3COO)2) • Sodium acetate (NaCH3COO) • Zinc acetate (Zn(CH3COO)2) |
| Double Salts |
Copper-calcium acetate (CuCa(CH3COO)4) • Uranyl-sodium acetate (NaUО2(CH3COO)3) • Uranyl-zinc-sodium acetate (NaZn(UO2)3(CH3COO)9) |
| Calcium compounds | |
|---|---|
| Salts |
Calcium acetate (Ca(CH3COO)2) • Calcium carbonate (CaCO3) • Calcium formate (Ca(COOH)2) • Calcium nitrate (Ca(NO3)2) • Calcium sulfate (CaSO4) • Calcium tartrate (CaC4H4O6) • Calcium trifluoroacetate (Ca(CF3COO)2) • Calcium chloride (CaCl2) |
| Double salts |
Copper-calcium acetate (CuCa(CH3COO)4) • Calcium-ammonium nitrate (5Ca(NO3)2 · NH4NO3) |