Chromium antimony titanate

Description

A lightfast, opaque, synthetic organic pigment made about 1946. Chrome titanate is a mixed metal pigment that has a rutile structure. It was created to provide a stable, non-toxic alternative to traditional lead- or chromate-based brown and yellow pigments. Analysis shows the approximate proportions are 2-5% chromic oxide, 10-20 % antimony pentoxide, with the remainder titanium dioxide. The additions of electropositive elements will both intensify and darken the yellow color. Its hue ranges from warm yellow-brown to olive-brown, depending on the precise formulation and particle size. Chrome titanate was originally developed as a vinyl siding pigment that retain its color under prolonged sunlight exposure. Its use transitioned into paints, ceramics, plastics and other finishes. In artist paints, chrome titanate is considered as a safe alternative to Naples yellow due to its excellent lightfastness, heat stability and chemical resistance.

Synonyms and Related Terms

Chrome titanate; Pigment Brown 24; chrome titanate yellow; titanium orange

Risks

• Non-toxic
• Avoid dust and spray

Physical and Chemical Properties

• Color = earthy, dark yellow to yellow-brown shade
• Resistant to light, hear, and chemicals
• Composition = (Ti, Cr, Sb) O2
• CAS = 68186-90-3
• Inert, stable to 1300 C.

Resources and Citations

• C. J. Harbeck, 'Ceramic Pigments' Industrial and Engineering Chemistry, 30(7), 1938.
• Artists Pigment.org: Chrome Antimony Titanate
• Art is Creation: Pbr24
• Handprint.com: PBr24
• CHSOS: Spectra (Reflectance, XRF, Raman, FTIR) for Chrome titanate