

| Melting Point | 290°C (dec., lit.) |
| Color | Dark yellow |
| Physical Form | Powder |
| Molecular Weight | 376.36 g/mol |
| SMILES String | CC1=C(C)C=C(N(C[C@H](O)[C@@H]([C@H](O)CO)O)C(C2=N3)=NC(NC2=O)=O)C3=C1 |
| CAS Number | 83-88-5 |
| EC Number | 201-507-1 |
| Empirical Formula | C17H20N4O6 |
| NACRES | NA.21 |
| PubChem Substance ID | 24899397 |
| UNSPSC Code | 12352205 |
| MDL Number | MFCD00005022 |
| InChI | 1S/C17H20N4O6/c1-7-3-9-10(4-8(7)2)21(5-11(23)14(25)12(24)6-22)15-13(18-9)16(26)20-17(27)19-15/h3-4,11-12,14,22-25H,5-6H2,1-2H3,(H,20,26,27) |
| InChI Key | AUNGANRZJHBGPY-SCRDCRAPSA-N |
| eCl@ss | 34058005 |
| Beilstein/REAXYS Number | 97825 |
| Quality Level | 200 |
| Reference Grade | Meets USP testing specifications, 98.0–102.0% dry basis |
| Applications | Food fortification manufacturing (vitamin B2 enrichment) |
Riboflavin is an essential water-soluble B-vitamin, found naturally in milk and eggs, that the body converts into two active enzyme cofactors: flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD). These cofactors are essential for redox reactions throughout cellular metabolism, which is why riboflavin deficiency produces a well-defined clinical syndrome (ariboflavinosis) affecting energy metabolism, iron absorption, and tissue health.
Riboflavin’s largest manufacturing applications are in food fortification and dietary-supplement production, where it’s added to meet vitamin B2 nutritional requirements. It’s also used as a pharmaceutical formulation raw material and, in research settings, to study its antimicrobial photodynamic effects under UVA activation and its role as a precursor for the FAD/FMN cofactors central to metabolic redox chemistry.
*This reference listing carries no GHS hazard pictogram or hazard statement — it is not classified as GHS-hazardous.*
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Mainly in food fortification and dietary-supplement manufacturing, and as a pharmaceutical formulation raw material; it's also studied as a precursor to the essential metabolic cofactors FAD and FMN.
Milk and eggs are major natural dietary sources, though it's also added to many fortified foods during manufacturing.
83-88-5. (Sarchem's live page currently shows no CAS number at all — see the bug report at the top of this document.)
C17H20N4O6, molecular weight 376.36 g/mol.
Yes, for every lot (SKU S2680).