Dinitroaniline orange

Description

An azo-type organic colorant prepared by combining beta naphthol with 2,4-dinitroaniline. Dinitroaniline orange was first patented in 1909. It has good resistance to fading but may darken with time. Dinitroaniline orange is used for textile printing, architectural paints, plastics, crayons, coatings, printing inks and some artists' paints.

Synonyms and Related Terms

Pigment Orange 5; CI 12075; Orthonitroaniline orange; 1-[(2,4-dinitrophenyl)diazenyl]naphthalen-2-ol (IUPAC); D&C Orange No. 17; Hansa Red GG

Risks

• May bleed in paint solvents.
• Listed as non-toxic but it is mutagenic and carcinogenic
• Guide Chem: SDS
• NIH: C.I. Pigment Orange 5

Physical and Chemical Properties

• Formula = C16H10N4O5 (mol. wt. =338.27)
• CAS # = 3468-63-1
• Resistant to alkalis, acids.
• Density = 1.48-2.00 g/ml

Resources and Citations

• B.Berrie, S.Q.Lomax, "Azo Pigments: Their History, Synthesis, Properties and Use in Artists' Materials" in Studies in the History of Art, No.57, National Gallery of Art, Washington DC, 1997.
• Guy Weismantel, Paint Handbook, McGraw-Hill Book Company, New York, 1981