Diarylide colors

Description

A class of synthetic mostly yellow but with some orange and red organic colorants. Diarylide dyes are insoluble direct azo dyes that were first synthesized from benzidine in 1911. They were not widely used until the 1930s. Diarylide yellows have good tinting strength, opacity and solvent resistance. They have fair to good lightfastness and are primarily used in printing inks, plastic, rubbers, as well as architectural and artists paints.

See also arylide.

Synonyms and Related Terms

diarylide dyes; disazo dye; benzidine yellow; Pigment Yellow 12; Pigment Orange 13; Pigment Red 41; Pigment Yellow 83; benzidine orange

FTIR PY12(MFA)

FTIR PY13(MFA)

FTIR PY14(MFA)

FTIR PY17(MFA)

FTIR PY83(MFA)

FTIR PY127(MFA)

FTIR PO34(MFA)

Comparisons

Information table for FTIR spectra

Pigment number	Pigment name	Manufacture and number	Comments
PY012	diarylide yellow	unknown
PY013	diarylide AAMX yellow_rs	Sun 275-1149
PY014	diarylide AAOT yellow	Sun 274-1744; Magruder ya1161-lu and ya1283-dc	FTIR spectra appear the same for all PY014
PY017	diarylide AAOA yellow	Sun 275-0023
PY083	diarylide yellow	Sun 275-0570; Magruder yr1300-dc	FTIR spectra are the same for Sun and Magruder PY083
PY127	diarylide yellow	unknown
PO034	diarylide tolyl orange	Sun 282-0034

Physical and Chemical Properties

Resistant to alkalis and heat.

Risks

Highly toxic. Suspected carcinogen and teratogen. May cause bladder cancer. .

Resources and Citations

• Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979

• Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994

• Thomas B. Brill, Light Its Interaction with Art and Antiquities, Plenum Press, New York City, 1980

• B. Berrie, S.Q. Lomax, 'Azo Pigments: Their History, Synthesis, Properties and Use in Artists' Materials', Studies in the History of Art , National Gallery of Art, Washington DC, No. 57, 1997