Dimidium Bromide

• CAT Number: R058898
• CAS Number: 518-67-2
• Molecular Formula: C20H18BrN3
• Molecular Weight: 380.29
• Purity: ≥95%
• Synonyms: 3,8-Diamino-5-methyl-6-phenylphenanthridinium Bromide; Dimidium bromide; Phenanthridinium Compound 1553; Phenanthridium 1553; Trypadine
• Storage: -20°C
• IUPAC Name: 5-methyl-6-phenylphenanthridin-5-ium-3,8-diamine;bromide
• InChI: InChI=1S/C20H17N3.BrH/c1-23-19-12-15(22)8-10-17(19)16-9-7-14(21)11-18(16)20(23)13-5-3-2-4-6-13;/h2-12,22H,21H2,1H3;1H
• InChIKey: MQOKYEROIFEEBH-UHFFFAOYSA-N
• SMILES: C[N+]1=C2C=C(C=CC2=C3C=CC(=CC3=C1C4=CC=CC=C4)N)N.[Br-]

Dimidium bromide（Cat No.:R058898）, also known as ethidium bromide homologue or dimidium, is a planar, aromatic, cationic dye used primarily as a nucleic acid stain and intercalating agent. It binds strongly between DNA base pairs, making it useful in fluorescence microscopy and gel electrophoresis for visualizing nucleic acids. Structurally related to phenanthridinium dyes, dimidium bromide fluoresces under UV light upon DNA binding. It has also been studied for its potential antimicrobial and cytotoxic properties. Due to its mutagenic nature, it must be handled with caution in laboratory settings.