Stearic acid

reagent grade, 95%

Octadecanoic acid, Stearophanic acid, NSC 25956, 1-Heptadecanecarboxylic acid, C18:0, NSC 261168, STA, Cetylacetic acid
Linear Formula:
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


reagent grade

vapor pressure

1 mmHg ( 173.7 °C)




powder or flakes


361 °C (lit.)


67-72 °C (lit.)

SMILES string




InChI key


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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.


Stearic acid may be used to compose the core during sol-gel synthesis of nanoencapsulated phase change materials (NEPCMs).
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.


100 g in poly bottle
1 kg in poly bottle
5, 12 kg in fiber drum

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

235.4 °F - closed cup

Flash Point(C)

113 °C - closed cup

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

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