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Sigma-Aldrich

Stearic acid

reagent grade, 95%

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Synonym(s):
STA, 1-Heptadecanecarboxylic acid, C18:0, Cetylacetic acid, NSC 25956, NSC 261168, Octadecanoic acid, Stearophanic acid
Linear Formula:
CH3(CH2)16COOH
CAS Number:
57-11-4
Molecular Weight:
284.48
Beilstein:
608585
EC Number:
200-313-4
MDL number:
MFCD00002752
PubChem Substance ID:
24850497
NACRES:
NA.21

grade

reagent grade

Quality Level

200

vapor pressure

1 mmHg ( 173.7 °C)

Assay

95%

form

powder or flakes

bp

361 °C (lit.)

mp

67-72 °C (lit.)

SMILES string

CCCCCCCCCCCCCCCCCC(O)=O

InChI

1S/C18H36O2/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)

InChI key

QIQXTHQIDYTFRH-UHFFFAOYSA-N

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General description

Stearic acid (SA) is a straight chain fatty acid. It forms ordered monolayered Langmuir-Blodgett (LB) films on the surface of germanium. These LB films have been investigated by Fourier transform-infrared (FTIR)-attenuated total reflection (AR) spectra.

Conversion of SA with >98% selectivity to deoxygenated C17 products by employing carbon supported palladium catalyst has been reported. It is a promising phase change material (PCM) due to its non-toxicity and convenient melting temperature. Also, it exhibits almost negligible supercooling while undergoing phase change.

Application

Stearic acid can undergo esterification in the presence of mesoporous solid acid catalysts to form methyl stearate. Due to its waterproof ability, STA may be used to impart superhydrophobicity on various surfaces. STA may also be used in the preparation of stearic acid self-assembled monolayers.
Stearic acid may be used to compose the core during sol-gel synthesis of nanoencapsulated phase change materials (NEPCMs).

Storage Class Code

11 - Combustible Solids

WGK

nwg

Flash Point(F)

392.0 °F - Cleveland open cup

Flash Point(C)

200 °C - Cleveland open cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Facile synthesis and thermal performances of stearic acid/titania core/shell nanocapsules by sol-gel method.
Latibari ST, et al.
Energy, 85, 635-644 (2015)
Preparation and characterization of an ultrahydrophobic surface based on a stearic acid self-assembled monolayer over polyethyleneimine thin films.
Ren S, et al.
Surface Science, 546(2), 64-74 (2003)
FTIR-ATR studies on Langmuir-Blodgett films of stearic acid with 1-9 monolayers.
Kimura F, et al.
Langmuir, 2(1), 96-101 (1986)
Nano-crystalline, mesoporous aerogel sulfated zirconia as an efficient catalyst for esterification of stearic acid with methanol.
Saravanan K, et al.
Applied Catalysis. B, Environmental, 192, 161-170 (2016)
Study on superhydrophobic hybrids fabricated from multiwalled carbon nanotubes and stearic acid.
Wu T, et al.
Journal of Colloid and Interface Science, 348(1), 265-270 (2010)
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