Calcium stearate

Calcium stearate

Names
IUPAC name Calcium octadecanoate
Other names E470
Identifiers
CAS Number	1592-23-0 Y
3D model (Jmol)	Interactive image
ChEMBL	ChEMBL2106092 N
ChemSpider	14587 Y
ECHA InfoCard	100.014.976
PubChem	15324
UNII	776XM7047L Y
InChI InChI=1S/2C18H36O2.Ca/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2 Y Key: CJZGTCYPCWQAJB-UHFFFAOYSA-L Y InChI=1/2C18H36O2.Ca/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2 Key: CJZGTCYPCWQAJB-NUQVWONBAL
SMILES [Ca+2].[O-]C(=O)CCCCCCCCCCCCCCCCC.[O-]C(=O)CCCCCCCCCCCCCCCCC
Properties
Chemical formula	C36H70CaO4
Molar mass	607.03 g·mol−1
Appearance	white to yellowish-white powder
Density	1.08 g/cm3
Melting point	155 °C (311 °F; 428 K)
Solubility in water	0.004 g/100 mL (15 °C)
Solubility	soluble in hot pyridine slightly soluble in oil insoluble in alcohol, ether
Hazards
NFPA 704	1 2 0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Calcium stearate is carboxylate of calcium, classified as a calcium soap. It is a component of some lubricants, surfactants, as well as many foodstuffs. It is a white waxy powder.

Calcium stearate is produced by heating stearic acid and calcium oxide:

It is also the main component of soap scum, a white solid that forms when soap is mixed with hard water. Unlike soaps containing sodium and potassium, calcium stearate is insoluble in water and does not lather well. Commercially it is sold as a 50% dispersion in water or as a spray dried powder. As a food additive it is known by the generic E number E470.

Calcium stearate is a waxy material with low solubility in water, unlike traditional sodium and potassium soaps. It is also easy and cheap to produce, and exhibits low toxicity. These attributes are the basis of many of its applications. Related applications exist for the magnesium stearate.