PY74LF—Hansa Yellow

Pigment Type

organic, monoazo

Chemical Name

n/a

Chemical Formula

C₁₈H₁₈N₄O₆

Properties

This Hansa Yellow ranges from reddish yellow to greenish yellow with temperature shifts from cool to warm hues. It has good tinting strength and average to slow drying time.

Permanence

Hansa Yellow PY74 has excellent lightfastness, particularly in the darker shades. Pigment PY74LF is a proprietary preparation of PY74 for which the manufacturer claims better lightfastness.

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

Hansa Yellow pigments are marketed under many names, including Arylide Yellow, Brilliant Yellow, Monoazo Yellow, and Permanent Yellow.