Ammonium stearate

Ammonium stearate is a chemical compound with the chemical formula CH₃(CH₂)₁₆COONH₄.This is an organic ammonium salt of stearic acid.^[1][2]

Ammonium stearate

Names
IUPAC name azanium;octadecanoate
Other names Octadecanoic acid, ammonium salt
Identifiers
CAS Number	1002-89-7 Y
3D model (JSmol)	Interactive image
ChemSpider	55192
ECHA InfoCard	100.012.450
EC Number	213-695-2
PubChem CID	9861187
UNII	37899330TZ
CompTox Dashboard (EPA)	DTXSID0027353
InChI InChI=1S/C18H36O2.H3N/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2-17H2,1H3,(H,19,20);1H3 Key: JPNZKPRONVOMLL-UHFFFAOYSA-N
SMILES CCCCCCCCCCCCCCCCCC(=O)[O-].[NH4+]
Properties
Chemical formula	C18H39NO2
Molar mass	301.515 g·mol−1
Appearance	Yellow-white powder
Melting point	70-75 °F
Solubility in water	soluble
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315
Precautionary statements	P264+P265, P280, P305+P351+P338, P337+P317
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

The compound can be prepared by reacting stearic acid and excess 28-30% NH₃ solution. Also by reacting stearic acid and ammonium carbonate or ammonium hydroxide.^[3]

Physical properties

The compound forms yellow-white powder.

Soluble in methanol and ethanol; slightly soluble in water, benzene, xylene, naphtha; practically insoluble in acetone.^[4]

When heated, the powder of ammonium stearate decomposes, releasing toxic fumes of NH₃.

Uses

The compound is used to produce vanishing creams^[5] and waterproofing cements.^[6][7]