Grumbacher Academy Acrylics - Cadmium Red Hue, 75 ml tube

Pigment Information

This color contains the following pigments:

PO16-Dianisidine Orange

PR112-Naphthol Red AS-D

Pigment Name

PO16-Dianisidine Orange

Pigment Type

organic, disazo

Chemical Formula

C34H32N6O6

Properties

Dianisidine Orange is a semi-opaque orange dye that can be laked to form a pigment. This pigment  ranges from yellowish to reddish orange in different laked forms.

Permanence

Dianisidine Orange has only fair lightfastness.

Toxicity

A Japanese study in which rats were given large daily doses of Dianisidine Orange revealed no acute toxicity or mutagenic effects.

History

Dianisidine Orange is used mostly in coloring plastics and in inks, in applications where safety is important but lightfastness and longevity are not paramount.

Pigment Name

PR112-Naphthol Red AS-D

Pigment Type

organic, monoazo

Chemical Formula

C24H16Cl3N3O2

Properties

This Naphthol Red is an intense scarlet red pigment that is heavily staining. It has an average drying time. It is semi-transparent and has relatively poor covering power.

Permanence

This Naphthol Red has been rated as having excellent lightfastness under ASTM testing, but other testing methods have demonstrated some tendancy for the color to fade with exposure to strong ultraviolet light. It has been considered a replacement for less lightfast naphthol reds such as PR3. Not suitable for exterior use.

Toxicity

Naphthol Reds are not considered toxic. Naphthol Red AS-D may cause eye, skin, or respiratory irritation. Contact with dry pigment should be avoided.

History

Unknown.