CAS Registry Number

CAS 1239-45-8 — Ethidium bromide

Ethidium bromide is a fluorescent dye widely used in molecular biology for DNA staining in gel electrophoresis, allowing visualization of nucleic acids under UV light. It intercalates between DNA bases, emitting a bright orange fluorescence when bound. This product is available as a high-purity solid with a CAS number of 1239-45-8, molecular formula C21H20BrN3, and a molecular weight of 394.31. Store at ambient conditions in a tightly sealed container. The signal word is Danger due to its known mutagenicity and toxicity. Molekula supplies ethidium bromide from research to bulk quantities with full documentation and ISO 9001:2015 traceability.