An internal standard for the quantification of stearic acid
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Stearic Acid-13C18

Item No. 45768

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
octadecanoic-13C18 acid
CAS Number
287100-83-8
Synonyms
  • C18:0-13C18
  • FA 18:0-13C18
  • Octadecanoic Acid-13C18
Molecular Formula
[13C]18H36O2
Formula Weight
302.4
Purity
≥95%
Formulation (Request formulation change)
A solid
Solubility(Learn about Variance in Solubility)
Ethanol: Slightly soluble: 0.1-1 mg/ml
SMILES
[13CH3][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13CH2][13C](O)=O
InChi Code
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)/i1+1,2+1,3+1,4+1,5+1,6+1,7+1,8+1,9+1,10+1,11+1,12+1,13+1,14+1,15+1,16+1,17+1,18+1
InChi Key
QIQXTHQIDYTFRH-HXPQJNGISA-N
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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    5 mg

    $69

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    10 mg

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    25 mg

    $276

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    50 mg

    $483

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    Product Description

    Stearic acid-13C18 is intended for use as an internal standard for the quantification of stearic acid (Item No. 10011298) by GC- or LC-MS. Stearic acid is a long-chain saturated fatty acid. It is a major component of cocoa butter, milk fats, and hydrogenated oils, but it can also be synthesized endogenously from acetyl-CoA (Item No. 16160).1 Stearic acid is a poor substrate for triacylglycerol or cholesteryl ester synthesis and is rapidly desaturated into oleic acid (Item Nos. 90260 | 24659) by stearoyl-CoA desaturase in vivo. Unlike lauric, myristic, or palmitic acids, stearic acid does not increase plasma LDL in an animal model and reduces hepatic total cholesterol levels.2

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Sampath, H., and Ntambi, J.M. The fate and intermediary metabolism of stearic acid. Lipids 40(12), 1187-1191 (2005).

    2. Woollett, L.A., Spady, D.K., and Dietschy, J.M. Regulatory effects of the saturated fatty acids 6:0 through 18:0 on hepatic low density lipoprotein receptor activity in the hamster. J. Clin. Invest. 89(4), 1133-1141 (1992).