RIBOFLAVIN For Biochemistry

Description

Physical state at 20 °C	Solid	Colour	Orange yellow powder
Odour	Slight odour	pH value	6
Melting point/ Freezing point [°C]	280°C

Appearance	A yellow to orange yellow crystalline powder
Solubility	Very slightly soluble in water, practically insoluble in ethanol (96 per cent)
Assay (spectrophotometric; on dried basis)	98 – 101%
Identification ‘A’ & ‘B’	To pass IP tests
pH	5.5 to 7.2
Specific optical rotation	-115° to -135°
Light absorption	–
at A373 nm/A267 nm	0.31 – 0.33
at A444 nm/A267 nm	0.36 – 0.39
Lumiflavine	To pass IP test
Loss on drying (at 105°C)	Max 1.5%
Sulphated ash	Max 0.1%

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