L-Arabinose Chemical Structure

What is L-Arabinose?

L-Arabinose is a naturally occurring sugar, and it is the L-stereoisomer of arabinose. It is a five-carbon sugar (pentose) that is found in various plant materials, particularly in polysaccharides such as hemicellulose and pectin.

Macsen Laboratories is the leading manufacturer and supplier of L-Arabinose with ISO certification.
Name of Product L-Arabinose
IUPAC Name (3R,4S,5S)-oxane-2,3,4,5-tetrol
Synonyms L-Ara; L-Arabinopyranose; L-Arabinopyranoside; L(+)-Arabinose
CAS No 5328-37-0
Molecular Formula C5H10O5
Molecular Weight 150.13 g/mol
Pubchem CID 439195


SR. No Criteria Limit/Specification
1 Appearance (form) Crystalline Solid Powder
2 Appearance (color) White to Off-white
3 Solubility 100 mg/mL (in water)
4 Solubility (Color and Turbidity) Colorless and Clear
5 Melting point 160-163 °C (lit.)


  • L-Arabinose is a crucial component in biochemical investigations, specifically in the fields of microbiology and biomedicine.
  • It is used as a selection marker in molecular biology experiments, particularly in the study of gene expression in certain bacterial systems.
  • It is sometimes also included in bacterial culture media as a carbon source.
  • It is also effective for use in the bioproduction of L-ribose and as a substrate for pentose sugar isomerase identification, differentiation, and characterization.


Q. Does L-Arabinose have an aldehyde or ketone group ?

L-Arabinose is a monosaccharide with aldehyde functional group.

Q. Is L-Arabinose an inhibitor?

L-arabinose selectively inhibits the intestinal enzyme sucrase, which is responsible for the breakdown of sucrose into glucose and fructose in the small intestine, in an uncompetitive manner and thus suppresses the glycemic response after sucrose ingestion in animals.

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