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Biotin-(ring-6,6-d₂) is also known as coenzyme R-(ring-6,6-d₂). This product is used as an internal analytical standard for the quantitation of biotin concentration in dietary supplements, fortified foods or within a complex biological matrix.

ChEBI: 5-(2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl)pentanoic acid is a member of biotins.

Biotin-(ring-6,6-d₂), an isotope-labeled analog of biotin, is also known as vitamin H (vitamin B₇). It is a water-soluble vitamin B essentially involved in the synthesis of fatty acids and in gluconeogenesis. Biotin is found in plants and animals and its deficiency potentially causes retardation in growth, alopecia and neurological impairment.