Zinc stearate

Structural formula
General
Surname	Zinc stearate
other names	Zinc dioctadecanoate ( IUPAC ) ; Zinc distearate; ZINC STEARATE ( INCI ) ;
Molecular formula	Zn (C 18 H 35 O 2 ) 2
Brief description	White dust
External identifiers / databases
EC number	209-151-9
ECHA InfoCard	100.008.321
PubChem	11178
ChemSpider	10705
Wikidata	Q204923
properties
Molar mass	632.33 g mol −1
Physical state	firmly
density	1.1 g cm −3
Melting point	130 ° C
solubility	almost insoluble in water and ethanol and diethyl ether ; soluble in benzene , xylene , toluene , fats and oils;
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
MAK	Switzerland: 3 mg m −3 (measured as respirable dust )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Zinc stearate , also known as octadecanoic acid zinc salt, is the zinc salt of stearic acid . It is one of the metal soaps .

properties

It is a white powder with a melting point of 130 ° C, a flash point of 277 ° C and a self-ignition temperature of 420 ° C. The molecular weight is 632.3 g / mol. Zinc stearate is not soluble in water.

Zinc oxide is formed when zinc stearate is heated , and toxic fumes and gases are also produced when it is burned. Contact with zinc stearate can cause skin and eyes to become red. Inhaling the powder can cause a cough and sore throat . Ingestion may lead to nausea , vomiting and diarrhea . Avoid spreading the dust when handling zinc stearate. Attention must also be paid to the risk of a dust explosion or electrostatic charge.

use

Zinc stearate is used as a stabilizer for emulsions .

In card magic , zinc stearate is used as a card powder, which improves the sliding properties of playing cards .

Zinc stearate is also used as a lubricant in plastics processing. It prevents polyamide parts from sticking to one another and is an aid in case of plasticizing problems. If the plasticizing screw does not pull in the material properly, this can be improved by adding approx. 0.2% zinc stearate, especially with polyamide 6.0

Individual evidence

↑ Entry on ZINC STEARATE in the CosIng database of the EU Commission, accessed on March 11, 2020.
↑ ^a ^b ^c Entry on zinc stearate. In: Römpp Online . Georg Thieme Verlag, accessed on December 29, 2014.
↑ ^a ^b Entry on zinc stearate in the GESTIS substance database of the IFA , accessed on November 11, 2007(JavaScript required) .
↑ ^a ^b Zinc stearate data sheet from Sigma-Aldrich , accessed on April 26, 2011 ( PDF ).

↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 557-05-1 or zinc stearate ), accessed on November 2, 2015.

↑ Card powder - what is it and how is it used?

[CosIng-1] Entry on ZINC STEARATE in the CosIng database of the EU Commission, accessed on March 11, 2020.

[roempp-2] Entry on zinc stearate. In: Römpp Online . Georg Thieme Verlag, accessed on December 29, 2014.

[GESTIS-3] Entry on zinc stearate in the GESTIS substance database of the IFA , accessed on November 11, 2007(JavaScript required) .

[Sigma-4] Zinc stearate data sheet from Sigma-Aldrich , accessed on April 26, 2011 ( PDF ).

[5] Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 557-05-1 or zinc stearate ), accessed on November 2, 2015.

[6] Card powder - what is it and how is it used?