Sodium stearate

Structural formula
General
Surname	Sodium stearate
other names	SODIUM STEARATE ( INCI ) ; E 470a (general name of sodium, potassium and calcium salts of fatty acids);
Molecular formula	C 18 H 35 NaO 2
Brief description	white solid
External identifiers / databases
EC number	212-490-5
ECHA InfoCard	100.011.354
PubChem	2724691
Wikidata	Q420066
properties
Molar mass	306.46 g · mol -1
Physical state	firmly
density	1.02 g cm −3
Melting point	205 ° C
solubility	soluble in water
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
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sodium stearate is the sodium salt of stearic acid and a basic component of many soaps (e.g. curd soap ). Their manufacturing process (reaction of vegetable oils with caustic soda) and, indirectly, the compound itself have been known for a long time. In addition to making cleaning agents, it is also used as a thickener / emulsifier in creams, shampoos and foods.

Extraction and presentation

Sodium stearate can be made for example by saponification of tristearin with sodium hydroxide to sodium stearate, and glycerol .

${\ displaystyle \ mathrm {C_ {3} H_ {5} (OOCC_ {17} H_ {35}) _ {3} +3 \ NaOH}}$ ${\ displaystyle \ mathrm {\ longrightarrow 3 \ C_ {17} H_ {35} COONa + \ C_ {3} H_ {5} (OH) _ {3}}}$

properties

Sodium stearate is a flammable white solid that is soluble in water.

Individual evidence

↑ Entry on SODIUM STEARATE in the CosIng database of the EU Commission, accessed on December 28, 2019.
↑ ^a ^b ^c ^d ^e Entry on sodium stearate in the GESTIS substance database of the IFA , accessed on February 7, 2019(JavaScript required) .
↑ sciencslab.com: Safety data sheet .
↑ Chemistrystore: Sodium Stearate safety data sheet ( Memento of March 11, 2006 in the Internet Archive ) (PDF; 126 kB).

^ Kremer Pigmente GmbH & Co. KG: Seifen ( Memento from April 26, 2007 in the Internet Archive )

↑ University of Applied Sciences Trier: Fettsäuren ( Memento from September 26, 2007 in the Internet Archive ) (PDF; 141 kB).

↑ Our products for cosmetics ( Memento from January 6, 2009 in the Internet Archive ).

↑ E number directory .

↑ seifenparadies.de: What actually is soap? ( Memento from June 26, 2009 in the Internet Archive )

↑ University of Basel: Organic Chemistry for Physicians ( Memento of October 3, 2006 in the Internet Archive ) (PDF; 3.5 MB).

[CosIng-1] Entry on SODIUM STEARATE in the CosIng database of the EU Commission, accessed on December 28, 2019.

[GESTIS-2] Entry on sodium stearate in the GESTIS substance database of the IFA , accessed on February 7, 2019(JavaScript required) .

[3] sciencslab.com: Safety data sheet .

[4] Chemistrystore: Sodium Stearate safety data sheet ( Memento of March 11, 2006 in the Internet Archive ) (PDF; 126 kB).

[5] Kremer Pigmente GmbH & Co. KG: Seifen ( Memento from April 26, 2007 in the Internet Archive )

[6] University of Applied Sciences Trier: Fettsäuren ( Memento from September 26, 2007 in the Internet Archive ) (PDF; 141 kB).

[7] Our products for cosmetics ( Memento from January 6, 2009 in the Internet Archive ).

[8] E number directory .

[9] seifenparadies.de: What actually is soap? ( Memento from June 26, 2009 in the Internet Archive )

[10] University of Basel: Organic Chemistry for Physicians ( Memento of October 3, 2006 in the Internet Archive ) (PDF; 3.5 MB).