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Research Paper | Chemistry | India | Volume 9 Issue 4, April 2020
Metachromasia Induced in Cationic Dyes by Iodide Salts
Abstract: Inorganic salts like NaI and KI induce distinct metachromasia in thiazine dye 1, 9-dimethylmethylene blue (DMMB, 2.0X10-5M) and cyanine dye pinacyanol chloride (PCYN, 2.0X10-5M). Half plateau values signifying destruction of metachromatic compounds to the extent of 50 % correspond to ̴22 %, and ̴30 % ethanol for DMMB-NaI, and PCYN-NaI systems respectively. Conductometric titrations reveal that DMMB and PCYN bind with NaI in the molar ratio of 1: 1
Keywords: Metachromasia, Chromotrope, α-band, β-band, µ-band
Edition: Volume 9 Issue 4, April 2020,
Pages: 810 - 812