Is Calcium disodium bis[2-chloro-5-[(2-hydroxy-1-naphthyl)azo]-4-sulphonatobenzoate] vegan?

Pigment Red 68 is also known as Calcium disodium bis[2-chloro-5-[(2-hydroxy-1-naphthyl)azo]-4-sulphonatobenzoate].

Pigment Red 68 is a synthetic monoazo pigment, chemically a calcium disodium naphthol azo sulfonate benzoate compound, used as a colourant.

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