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Merck
CN

175366

Stearic acid

reagent grade, 95%, powder or flakes

Synonym(s):

STA, 1-Heptadecanecarboxylic acid, C18:0, Cetylacetic acid, NSC 25956, NSC 261168, Octadecanoic acid, Stearophanic acid

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About This Item

Linear Formula:
CH3(CH2)16COOH
CAS Number:
57-11-4
Molecular Weight:
284.48
NACRES:
NA.21
PubChem Substance ID:
24850497
UNSPSC Code:
12352106
EC Number:
200-313-4
MDL number:
MFCD00002752
Beilstein/REAXYS Number:
608585

Key Documents

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Product Name

Stearic acid, reagent grade, 95%

InChI key

QIQXTHQIDYTFRH-UHFFFAOYSA-N

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)

SMILES string

CCCCCCCCCCCCCCCCCC(O)=O

grade

reagent grade

vapor pressure

1 mmHg ( 173.7 °C)

assay

95%

form

powder or flakes

bp

361 °C (lit.)

mp

67-72 °C (lit.)

functional group

carboxylic acid

Quality Level

200

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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).

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.

Storage Class

11 - Combustible Solids

wgk

nwg

flash_point_f

392.0 °F - Cleveland open cup

flash_point_c

200 °C - Cleveland open cup

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
SHBT1329
SHBS7813
0000427334
0000427334
SHBS4546

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Heterogeneous catalytic deoxygenation of stearic acid for production of biodiesel.
Latibari ST, et al.
Industrial & Engineering Chemistry Research, 45(16), 5708-5715 (2006)
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)
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)
FTIR-ATR studies on Langmuir-Blodgett films of stearic acid with 1-9 monolayers.
Kimura F, et al.
Langmuir, 2(1), 96-101 (1986)
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