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PO36—Benzimidazolone Orange

Pigment Type

organic, monoazo

Chemical Name

n/a

Chemical Formula

C₁₇H₁₃ClN₆O₅

Properties

Benzimidazolone Orange is a reddish orange pigment that can lose its intensity and become dull in tints. It has an average drying time.

Permanence

Benzimidazolone Orange has excellent lightfastness and outstanding heat and solvent stability for a monoazo pigment.

Toxicity

Benzimidazolone Orange is not considered toxic.

History

The benzimidazolone group of pigments was developed and patented in 1960 by Hoechst A.G., a German chemical manufacturer that was a forerunner of the pharmaceutical company Aventis. Use of benzimidazolone pigments in the auto industry, especially Benzimidazolone Orange, became common in the 1980s because they were common replacements for lead chromate pigments, which were phased out during this period.

Alternate Names

n/a

PY3—Hansa Yellow 10G

Pigment Type

organic, monoazo

Chemical Name

n/a

Chemical Formula

C₁₆H₁₂CL₂N₄O₂

Properties

This Hansa yellow is a transparent yellow. It has great brightness and tinting strength and its drying time ranges from average to slow.

Hansa Yellow makes more intense tints and cleaner secondaries than Cadmium Yellows, especially when mixed with other organic or modern colors like Phthalo Blue and Green. Because they are more transparent, they have great value as glazing colors.

Permanence

This Hansa Yellow has fair to good permanence, particularly in the lighter shades.

Toxicity

Hansa Yellow has no significant acute hazards, though its chronic hazards have not been well studied.

History

Hansa Yellows were first made in Germany just before WW1 from a series of synthetic dyestuffs called Pigment Yellow. They were intended to be a synthetic replacement for Cadmium Yellow.

Alternate Names

Arylamide Yellow, Arylide, Arylide Yellow, Azo, Brilliant Yellow, Monoazo, Monolite Yellow, Permanent Yellow.

PY170—Diarylide Yellow 170

Pigment Type

organic, disazo

Chemical Name

n/a

Chemical Formula

n/a

Properties

Diarylide Yellow 170 is an orange to reddish yellow that is semi-opaque and has moderate tinting strength, depending on how finely it is ground.

Permanence

Diarylide Yellow 170 has good lightfastness, but is considered inferior to some more expensive pigments of comparable hue, such as Benzimidazolone Yellow.

Toxicity

Diarylide Yellow 170 has no significant acute hazards, but chronic hazards have not been well studied.

History

n/a

Alternate Names

Pigment Yellow FRN, Lysopac™ Geel 7010C