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Picric acid is an organic compound with the formula (O2N)3C6H2OH.
P 1867 (OTTO) Picric acid, GR 99.5% Cas 88-89-1 - used for many years by fly tyers to dye mole skins and feathers a dark olive green. P 1867 (OTTO) Picric acid, GR 99.5% Cas 88-89-1 - used for red light sulphur black and acid dyes.