Ethylenedinitrilotetraacetic acid dipotassium salt. Ethylenediaminetetraacetic acid dipotassium salt dihydrate for synthesis. CAS 25102-12-9, pH 4 - 5 (50 gl, HO, 20 C). Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.