Sennelier Watercolour S2 Sennelier Orange (641)

Transparent Pyrrole Orange is a yellow-shade orange with optimum performance, high saturation and excellent durability, excellent bleed resistance, and intrinsic strength coupled with good opacity and moderate rheology. It is semi-opaque, less opaque than Cadmium Orange. Chemical Name: dipyrrolopyrrol

Pigment Name: PO73—Transparent Pyrrole Orange

Pigment Type: Organic, aminoketone

Permanence: Transparent Pyrrole Orange has demonstrated excellent stability and lightfastness in automotive applications.

Toxicity: The Australian government's Department of Health and Aging reported in its Summary Report: NA/238 that "Irgazin DPP Orange 16AOA is likely to be of low oral and dermal toxicity in humans and to be non-irritating or very slightly irritating to the eyes and skin. It may cause lung irritation due to its particle size."

History: Irgazin Orange was developed as a lead-free alternative opaque orange pigment. It is used to colour plastics and polymers in decorative, industrial, and automotive applications.

Alternate Names: Irgazin Orange, Bright Orange, Aritint Orange, Unisphere DPP Orange, Dipyrrolopyrrol Orange