Calcium acetate

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:	https://en.crystalls.info/w/uploads/media/6/68/Irregular_pinacoidal_prism.json Irregular pinacoidal prism https://en.crystalls.info/w/uploads/media/5/52/Needle.json Needle ;
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:

2CH₃COOH + CaCO₃ = Ca(CH₃COO)₂ + H₂O + CO₂↑

2CH₃COOH + Ca(OH)₂ = Ca(CH₃COO)₂ + 2H₂O

For preparation of 100.00g of calcium acetate

monohydratemonohydrate
anhydrous

а 56.81g of carbonate or 42.05g of hydroxide and 97.39g of

70%70%
30%
9%

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:

2CH₃COOH + CaCl₂ = Ca(CH₃COO)₂↓ + 2HCl

2CH₃COOH + Ca(NO₃)₂ = Ca(CH₃COO)₂↓ + 2HNO₃

For preparation of 100.00g of calcium acetate

monohydratemonohydrate
anhydrous

а 124.35g of calcium chloride

hexahydratehexahydrate
anhydrous

or 134.04g of calcium nitrate

tetrahydratetetrahydrate
anhydrous

and 68.17g of

glacialglacial
70%

acetic acid is required.

Add to the flask with hot iron compounds solution a acid solution with 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:

Ca(NO₃)₂ + 2NaCH₃COO = Ca(CH₃COO)₂↓ + 2NaNO₃

For preparation of 100.00g of calcium acetate

monohydratemonohydrate
anhydrous

а 134.04g of calcium nitrate

tetrahydratetetrahydrate
anhydrous

and 154.48g of sodium acetate

trihydratetrihydrate
anhydrous

is required.

Add to the flask with hot calcium nitrate solution a sodium acetate solution with 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

Keep in its original form or under several layers of varnish at average humidity and room temperature. Do not keep crystals near heaters.

Solubility

TableGraph

Temperature	g/`100,00` g water		g/`100,00` g methanol	g/`100,00` g acetic acid
Temperature	(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`

Soluble in hydrazine. Insoluble in ethanol, acetone and benzene.

Gallery

Calcium acetateSergey Sachkov, VKontakteSergey SachkovVKontakte
Calcium acetateSergey Sachkov, VKontakteSergey SachkovVKontakte
Accidentally growth of a crystal, for about a yearCalcium acetate, Ivan Postnikov, VKontakteIvan PostnikovVKontakte
Accidentally growth of a crystal, for about a yearCalcium acetate, Ivan Postnikov, VKontakteIvan PostnikovVKontakte
Calcium acetateSergey Sachkov, VKontakteSergey SachkovVKontakte
Calcium acetateSergey Sachkov, VKontakteSergey SachkovVKontakte
Growing with slow evaporating methodCalcium acetate, Dmitry Shintyakov, Personal blogDmitry ShintyakovPersonal 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)

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:	Irregular pinacoidal prism Needle
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

Precursors

Reaction between calcium carbonate or hydroxide and acetic acid

Reaction between calcium chloride or nitrate and excess of concentrated acetic acid

Reaction between calcium nitrate and sodium acetate

Storage conditions

Solubility

Gallery

Video

Sources

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