Calcium stearate

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Structural formula
Structural formula of calcium stearate
General
Surname Calcium stearate
other names
  • Calcium octadecanoate
  • Calcium distearate
  • E  470a (ambiguous)
Molecular formula C 36 H 70 CaO 4
Brief description

white odorless combustible solid

External identifiers / databases
CAS number 1592-23-0
EC number 216-472-8
ECHA InfoCard 100.014.976
PubChem 15324
Wikidata Q423318
properties
Molar mass 607.04 g mol −1
Physical state

firmly

density

1.12 g cm −3

Melting point

140-160 ° C

boiling point

435 ° C (decomposition)

solubility

almost insoluble in water (2.2 mg l −1 at 20 ° C)

safety instructions
GHS labeling of hazardous substances
no GHS pictograms
H and P phrases H: no H-phrases
P: no P-phrases
Toxicological data

> 10,000 mg kg −1 ( LD 50 ,  rat ,  oral )

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Calcium stearate is the calcium salt of stearic acid and belongs to the lime soaps . In addition to calcium stearate, technical calcium stearate usually also contains other calcium salts of higher fatty acids , for example calcium palminate .

Extraction and presentation

Technical calcium stearate is obtained by reacting calcium chloride with the sodium salt of stearic acid (mostly contaminated with the sodium salt of palmitic acid ) and then washing out sodium chloride.

use

Calcium stearate is used to manufacture so-called non-tox stabilizers for plastics , preferably in conjunction with zinc stearate , but also barium stearate or magnesium stearate . It is also used as a lubricant in pharmaceutical products and as a lubricant ( Stauffer grease ) in the paper and metal processing industry, as a water repellent for building materials and in sand processing.

Individual evidence

  1. ↑ Entry on E 470a: Sodium, potassium and calcium salts of fatty acids in the European database for food additives, accessed on June 28, 2020.
  2. ↑ a b c d e f g Entry on calcium stearate in the GESTIS substance database of the IFA , accessed on December 5, 2016(JavaScript required) .
  3. ↑ a b Hermann Hager, Hager's Handbook of Pharmaceutical Practice, ISBN 3-540-60330-1 .
  4. ↑ prochem.ch: Kunststoff  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Dead Link / www.prochem.ch  
  5. ↑ Hansjürgen Saechtling: Saechtling plastic paperback . Carl Hanser Verlag GmbH Co KG, 2013, ISBN 978-3-446-43729-6 , pp. 725 ( limited preview in Google Book search).
  6. ↑ F. v. Bruchhausen, Siegfried Ebel, AW Frahm, E. Hackenthal: Hager's handbook of pharmaceutical practice substances AD . Springer-Verlag, 2013, ISBN 978-3-642-57995-0 , pp. 640 ( limited preview in Google Book search).