Hansa orange

Description

Originally a Hoechst AG trademark for a line of bright, transparent orange synthetic organic pigments. Hansa orange dyes are composed of dinitro- or ortho- aniline. This class of dye was first discovered in 1907 by R. Lauch.

See also Hansa.

FTIR KremerPO005(MFA)

FTIR SunPO005(MFA)

Synonyms and Related Terms

Pigment Orange 1, 2 and 5; CI Nos. 11725, 12060 and 12075

Listing

Pigment number (CI)	Pigment names	Manufacture	Comments
PO1 (11725)		unknown
PO2 (12060)		unknown
PO5 (12075)	Orthonitroaniline orange; dinitroaniline orange; Permanent Red P-F-7RK; Hansa Red GG	unknown	impermanent, semi-opaque, mid-value intense orange
PO005	Studio pigment orange	Kremer 55200	sample contains calcite
PO005	DNA orange	Sun 276-5483
PO005	monolite red 2g (beta-napthol)	unknown	from Tate Collection

Risks

• While listed as non-toxic, CI Pigment Orange 5 is a suspected carcinogen, mutagen and may contain toxic impurities.

Physical and Chemical Properties

• Hue: ranges from bright clean orange to dark reddish orange
• Transparency: transparent to semi-opaque
• Tinting strength: good to excellent tinting strength
• Lightfastness: poor to good lightfastness
• Stability: good chemical (water, acids, bases) and heat resistance

Resources and Citations

• Handprint.com: Orange pigments
• Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994
• Colour Index International online at www.colour-index.org
• CHSOS: Spectra (Reflectance, XRF, Raman, FTIR) for PO5 Hansa Orange