analytical standard

(2R)-3-Carboxy-N,N,N-trimethyl-2-(1-oxobutoxy)-1-propanaminium inner salt, Butanoyl-L-carnitine, C4-Carnitine
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
Pricing and availability is not currently available.


analytical standard

Quality Level


≥97.0% (HPLC)

optical activity

α/D -23.0±2.0°, c = 0.1 in H2O


certificate is enclosed in each package

shelf life

limited shelf life, expiry date on the label


≤10.0% water



storage temp.


SMILES string




InChI key


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General description

Butyryl-L-carnitine is a naturally occurring compound belonging to the acylcarnitine class of compounds as listed in the human metabolome database (HMBD). These compounds are reported to be used as biomarkers in the diagnosis of carnitine deficiency. It acts as a carrier of long chain acyl groups from activated fatty acids across the inner mitochondrial membrane into the mitochondrial matrix where they undergo β-oxidation to acetyl CoA to obtain usable energy via the citric acid cycle.


Butyryl-L-carnitine may be used as an analytical reference standard for the separation and identification of underivatized butyryl-L-carnitine in human plasma samples using high-performance liquid chromatography coupled to tandem mass spectrometry (HPLC-MS/MS). It may also be used as an analytical reference standard for the quantification of the analyte in biological samples using chromatography-based techniques.


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Tracing and separating plasma components causing matrix effects in hydrophilic interaction chromatography?electrospray ionization mass spectrometry
Journal of Chromatography. B, Biomedical Sciences and Applications, 923, 83-91 (2013)
Separation and identification of underivatized plasma acylcarnitine isomers using liquid chromatography?tandem mass spectrometry for the differential diagnosis of organic acidemias and fatty acid oxidation defects
Peng M, et al.
Journal of Chromatography A, 1319, 97-106 (2016)
Exogenous carnitine application augments transport of fatty acids into mitochondria and stimulates mitochondrial respiration in maize seedlings grown under normal and cold conditions
Turk H, et al.
Cryobiology, 9, 97-103 (2019)
Metabolomic analyses reveal extensive progenitor cell deficiencies in a mouse model of duchenne muscular dystrophy
Joseph J, et al.
Metabolites, 8(4), 61-61 (2018)
Ralph Fingerhut et al.
Analytical chemistry, 81(9), 3571-3575 (2009-03-28)
Electrospray ionization-tandem mass spectrometry (ESI-MS/MS) is increasingly used in newborn screening programs. Acylcarnitine profiles from dried blood spots (DBS) are used to detect fatty acid oxidation disorders, carnitine cycle disorders, and organic acidurias. Stored dried blood is also a valuable...

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