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Pigment yellow 34

Chrome Yellow is a natural yellow pigment made of lead(II) chromate (PbCrO4). It was first extracted from the mineral crocoite by the French chemist Louis Vauquelin in 1797.

Because the pigment tends to oxidize and darken on exposure to air over time, and it contains lead, a toxic, heavy metal, it has been largely replaced by another pigment, Cadmium Yellow (mixed with enough Cadmium Orange to produce a color equivalent to chrome yellow). Cadmium pigments on their own are toxic as well from the cadmium content, and have themselves been replaced with azo pigments.  

Hiding Power (g/m3) 41
Strength vs. National Standard(%) 115
Oil absoroption g/100g <25
Specific Gravity g/cm3 5.52
Cowles Dispersity1 ≤55
Residue on 43um sieve(%) ≤0.1
Heat resistance (Powder) °C-min 180-30
Light fastness2 6
pH of water extract 5.4-7.0

Application:Mainly used in coatings,plastics.