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Note: Do not rely on this information. It is very old.
Helvetia Green
Helvetia Green, also known as Acid Green, a fine green organic dyestuff, derived, like many other colour materials, from triphenyl methane (C6H5)3CH.
Helvetia Green, also known as Acid Green, a fine green organic dyestuff, derived, like many other colour materials, from triphenyl methane (C6H5)3CH.