Royal Talens Cobra Study Water Mixable Oil Colors - Primary Yellow, 200 ml tube

This color contains the following pigments:

PY154-Benzimidazolone Yellow

PY184-Bismuth Yellow

Pigment Name

PY154-Benzimidazolone Yellow

Pigment Type

monoazo

Chemical Formula

Properties

Benzimidazolone Yellow is a pigment with dull tints and an average drying time.

Permanence

Benzimidazolone Yellow has excellent lightfastness.

Toxicity

Benzimidazolone Yellow 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.

Pigment Name

PY184-Bismuth Yellow

Pigment Type

inorganic

Chemical Name

bismuth orthovanadate or bismuth vanadium oxide

Chemical Formula

BiVO4

Properties

Bismuth Yellow is an intense, light value, semi-opaque yellow pigment with good tinting strength.

Permanence

Bismuth Yellow has excellent lightfastness.

Toxicity

Bismuth orthovanadate is harmful if swallowed. It is irritating to the eyes, respiratory system, and skin. Exposure may cause conjunctivitis, rhinitis, and reversible irritation of the respiratory tract. More severe cases may cause bronchitis, bronchospas

History

Bismuth orthovanadate occurs naturally in several minerals. Although it was synthesized in the 1920s, it was not developed as a commercial pigment until the 1970s.