Introduction: L-Arabinoseis a kind of aldopentoses, it's a low-calurie sweetener, it inhibits the sucrase activity and prevents increasing of blood glucose, therefore, it can prevent fat accumulation and against high blood glucose disease. L-Arabinoseis more common than D-arabinose in nature, it can be used as pharmaceutical intermediate, preparing culture medium and be used for synthesis in the flavour industry. CAS Number: 87-72-9, 5328-37-0 Synonym: L-Arabinose; L-(+)-Arabinose; L-Arabinopyranose Molecular Formula: C5H10O5 Molecular Weight: 150.13