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Benzidine Orange

PO16

Alternate Name

Dianisidine Orange

Pigment Description

Benzidine Orange. We advise all artists to research Benzidine in artist pigments regarding toxicity as it is serious. Monona Rossol's work on safety and artist pigments mentions that along with being contaminated with PCBs there are concerns about cancer causing chemicals. This color is actually used by a modern paintmaker in oils. It has abominable lightfastness and is reported to fade to a 2 or 3 on the blue wool scale.

Resources

PO16 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com,

Rossol, Monona. The Artist's Complete Health and Safety Guide. New York, NY : Allworth Press, 2001. The book is rather dated, updated information is available from her website.

Stats

Lightfastness

Very Poor

The 1980s NPIRI reported “appreciable” fading in both masstone and tints in its indoor and outdoor exposures.

Transparency

Semi-Opaque

Toxicity

Previously though to be Lower Concern, may be hazardous, may also contain toxic contaminants

“May be contaminated with PCBs. Heating releases cancer-causing 3,3-dimethoxybenzidine. Probably also metabolizes to 3,3-DMB.” From the work of Monona Rossol. In regard to the class of benzidine pigments she wrote, “Benzidine is known to cause bladder cancer. And all benzidine pigments and dyes that metabolize or decomposed to release free benzidine are expected to cause this disease…” Her recent work is available on her site.

Chemical Name

Disazo

with PO16 (Benzidine Orange)
No single-pigment Oil found with PO16

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