|Look up E101 in Wiktionary, the free dictionary.|
E101 may refer to:
- Riboflavin, food additive which has been assigned E number
- Flavin mononucleotide, biomolecule produced from riboflavin
- European route E101, autoroad of International E-road network between Kiev and Moscow
- E101, a form for stating applicable legislation within the European Economic Area and Switzerland
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