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1621008

USP

Stearic acid

United States Pharmacopeia (USP) Reference Standard

Synonym(s):

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
Beilstein:
608585
MDL number:
MFCD00002752
UNSPSC Code:
41116107
PubChem Substance ID:
329751146
NACRES:
NA.24

grade

pharmaceutical primary standard

vapor pressure

1 mmHg ( 173.7 °C)

API family

stearic acid

manufacturer/tradename

USP

bp

361 °C (lit.)

mp

67-72 °C (lit.)

solubility

acetone: soluble
benzene: freely soluble
chloroform: freely soluble
ethanol: soluble
ether: freely soluble
propylene glycol: soluble
water: practically insoluble

density

0.845 g/cm3

application(s)

pharmaceutical (small molecule)

format

neat

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

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia. For further information and support please go to the website of the issuing Pharmacopoeia.

Application

Stearic acid USP reference standard, intended for use in specified quality tests and assays as specified in the USP compendia. Also, for use with USP monographs such as:
  • Palmitic Acid
  • Calcium Stearate
  • Sodium Stearate
  • Aluminum Monostearate
  • Glycerin Suppositories
  • Magnesium Stearate

Analysis Note

These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind.  ​

Other Notes

Sales restrictions may apply.

Storage Class Code

11 - Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Aluminum Monostearate
United States Pharmacopeia, 44(4), 5612-5612 (2019)
Sodium Stearate
United States Pharmacopeia, 39(3), 6024-6024 (2023)
Deliang Zhou et al.
Journal of pharmaceutical sciences, 103(6), 1664-1672 (2014-03-22)
The purpose of this study is to identify critical physicochemical properties of hydroxypxropyl methylcellulose (HPMC) that impact the dissolution of a controlled release tablet and develop a strategy to mitigate the HPMC lot-to-lot and vendor-to-vendor variability. A screening experiment was
Sarah E E Berry
Nutrition research reviews, 22(1), 3-17 (2009-05-16)
The position of fatty acids in the TAG molecule (sn-1, sn-2 and sn-3) determines the physical properties of the fat, which affects its absorption, metabolism and distribution into tissues, which may have implications for the risk of CHD. The TAG
A M Turpeinen et al.
Arteriosclerosis, thrombosis, and vascular biology, 18(2), 316-322 (1998-03-04)
The effects of stearic acid (C18:0) and trans-fatty acids (trans-FAs) on measures of platelet function and prostacyclin (PGI2) production are poorly understood in humans. In this controlled dietary study, platelet function and endothelial PGI2 production were studied in healthy humans
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