FIELD: chemical industry.
SUBSTANCE: invention relates to salts of the compound of formula I with alkali metals, replacing hydrogen atoms in both sulfo groups
,
where R means the N-oxysuccinimidyl group
Also proposed a method of obtaining salts and their use.
EFFECT: salts of the compounds of formula I are fluorescent dyes with better characteristics than their analogues – water solubility, quantum yield, and extinction coefficient – and can be used as fluorescent labels of protein molecules.
3 cl, 4 dwg, 1 ex, 5 tbl
