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Table 1 Physicochemical properties of dyes (malachite green, methyl violet, and methylene blue)

From: Alginate-coated perlite beads for the efficient removal of methylene blue, malachite green, and methyl violet from aqueous solutions: kinetic, thermodynamic, and equilibrium studies

Commercial name Structural formula λmax(nm) Molecular formula M (g mol−1)
Malachite green oxalate 617 C23H25N2 .1/2C2H2O4.C2HO4 463.51
Methyl violet 2B 579 C24H28ClN3 393.96
Methylene blue hydrate 664 C16H18ClN3S. xH2O 319.85