1040-23-9 6,7-Dihydroxy-4-methylcoumarin bis(hydrogen sulfate) disodium salt COUMARIN, 6,7-DIHYDROXY-4-METHYL-, BIS(HYDROGEN SULFATE), DISODIUM SALT Disodium (4-methyl-2-oxo-2H-1-benzopyran-6,7-diyl)disulphate EINECS 213-865-6