Pigment Yellow 4, with the CAS number 1657-16-5, is an organic pigment primarily used in various applications such as coatings, plastics, and inks due to its vibrant yellow hue and excellent lightfastness. It is classified as an azo pigment, characterized by the presence of an azo group (-N=N-) in its molecular structure, which contributes to its color properties. This pigment exhibits good thermal stability and resistance to solvents, making it suitable for outdoor applications where durability is essential. Additionally, Pigment Yellow 4 is known for its non-toxic nature, which aligns with increasing regulatory demands for safer chemical substances in consumer products. Its application extends to art materials and industrial coatings, where it provides bright coloration and opacity. However, as with many azo compounds, it is essential to monitor for potential environmental and health impacts, particularly concerning its degradation products. Overall, Pigment Yellow 4 is valued for its performance characteristics and versatility in various formulations.

Pigment Yellow 4

1657-16-5: 2-(4-Nitrophenyl)hydrazono-1-phenylaminobutane-1,3-dione, 2-[(4-Nitrophenyl)diazenyl]-3-oxo-N-phenylbutanamide, 2-[(E)-(4-nitrophenyl)diazenyl]-3-oxo-N-phenylbutanamide, 2-[2-(4-Nitrophenyl)diazenyl]-3-oxo-N-phenylbutanamide, Acetoacetanilide, 2-[(p-nitrophenyl)azo]-, Butanamide, 2-[(4-nitrophenyl)azo]-3-oxo-N-phenyl-, Butanamide, 2-[2-(4-nitrophenyl)diazenyl]-3-oxo-N-phenyl-, Carnelio Yellow 5G, Eljon Yellow 5G, Fanchon Yellow (13G) YH-3, Fast Yellow 11J, Hansa Yellow 13G, Hansa Yellow Toner 13G Ya-8260, Irgalite Yellow 5G, Irgalite Yellow 5GL, Kromon Primrose Yellow, NSC 521321, No. 8 Forthfast Yellow 5G, No. 8/10 Forthfast Yellow 5G, Pigment Yellow 4, Pigment Yellow 5G, Process Yellow 10GS, Recolite Yellow 5G, C.I. Pigment Yellow 4,  C.I. Pigment Yellow 4 (8CI),  C.I. Pigment Yellow 4, C.I. 11665

Pigment yellow 4 (PY4) is an organic compound that is a mixture of calcium pantothenate, cyclic peptide, polycarboxylic acid, glycol ether and hydroxyl group. PY4 can be produced by the reaction of calcium chloride, sodium hydroxide and phenol in a reaction vessel. It has a particle size of 1-20μm and is used as an additive to paints and plastics to increase their resistance to environmental pollution. PY4 also has a functional group that can be polymerized using an initiator such as benzoyl peroxide or AIBN.

CAS 1657-16-5: Pigment Yellow 4

Pigment yellow 4

Ref: 3D-FP165458