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AssigneeDIC Corporation
InventorsShumei Ji, Issei Masuko, Masaki Hosaka, Kyoichi Okada, Nagatoshi Kobayashi, Xiyang Liao, Wei Zhao
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The issue of the present invention is to provide a disazo pigment with high safety in which the content of chemical substances that may be harmful, in particular, in the food packaging field and the like and that may be regulated substances is reduced. A disazo pigment according to the present invention has a polychlorinated biphenyl content of less than 15 ppm and a primary aromatic amine content of less than 700 ppm. Preferably, the disazo pigment is at least one selected from a group consisting of C.I. Pigment Yellow 83, C.I. Pigment Yellow 13, and Cl. Pigment Yellow 14.
A disazo pigment comprising C.I. Pigment Yellow 13 and having a polychlorinated biphenyl content of less than 8 ppm and a primary aromatic amine content of less than 500 ppm wherein the primary aromatic amine content is a total amount of primary aromatic amines present in the disazo pigment.
Dependencies are inferred from the claim text.