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Decanoic acid
Decanoic acid
Systematic name Decanoic acid
Other names Capric acid
n-Capric acid
n-Decanoic acid
Decylic acid
n-Decylic acid
Molecular formula C10H20O2
Molar mass 172.26 g/mol
Appearance White crystals with strong smell
CAS number [334-48-5]
Density and phase 0.893 g/cm3, ?
Solubility in water immiscible
Melting point 31 °C (304 K)
Boiling point 269 °C (542 K)
Acidity (pKa)  ?
Viscosity  ? cP at ? °C
MSDS External MSDS
Main hazards Medium toxicity
May cause respiratory irritation
May be toxic on ingestion
May be toxic on skin contact
NFPA 704
Flash point 112 °C
R/S statement R: R36

S: S24 S25 S26 S36 S37 S39
RTECS number  ?
Related compounds
Related compounds Decanol
Related fatty acids Caprylic acid
Lauric acid
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references

Decanoic acid is a type of carboxylic acid. Its formula is CH3(CH2)8COOH. It is also known as capric acid. Salts and esters of decanoic acid are called decanoates.

It is used in organic synthesis and industrially in the manufacture of perfumes, lubricants, greases, rubber, dyes, plastics, food additives and pharmaceuticals.


Decanoate salts and esters of various drugs are available. Since decanoic acid is a fatty acid, forming a salt or ester with a drug will increase its lipophilicity and its affinity for fatty tissue. Since distribution of a drug from fatty tissue is usually slow, one may develop a long-acting injectable form of a drug (called a depot injection) by using its decanoate form. Some examples of drugs available as a decanoate ester or salt include nandrolone, fluphenazine, bromperidol, and haloperidol.

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