Cadmium yellow

Description

Cadmium yellow at 100x; normal and UV light

A permanent, yellow pigment composed of Cadmium sulfide. Cadmium yellows were synthetically prepared in Germany by Friedrich Strohmeyer in 1817. The bright yellow pigments slowly began to be used as artist paints in the mid 1840s, gaining in popularity in the early 20th century. Variations in particle size and chemical composition produce as range of colors from light yellow to orange. In the 1920s, the cadmium pigments were co-precipitated with Barium sulfate to form the cheaper cadmium lithopone (cadmopone) pigments. Cadmium sulfide also occurs in minor amounts in the mineral greenockite.

Synonyms and Related Terms

cadmium sulfide; Pigment Yellow 37; CI 77191; Kadmiumgelb (Deut.); jaune de cadmium (Fr.); cadmium sulphide (Br.); giallo di cadmio (It.); amarillo de cadmio (Esp.); kitrino toy kadmioy (Gr.); cadmiumgeel (Ned.); amarelo de cádmio (Port.); cadmium lithopone; cadmopone; Aurora yellow; daffodil; radiant yellow; cadmia; Orient yellow; jaune brilliant; Cadmolith

Raman (MFA)

XRD

SEM

XRF

Risks

Toxic by ingestion and inhalation. Carcinogen.
M.Graham and Co. Watercolor: SDS

Physical and Chemical Properties

Cubic or hexagonal crystals.
Soluble in concentrated mineral acids with the evolution of H2S. Insoluble in water.
May fluoresce red.
The tiny yellow particles (about 1 micrometer) have a high refractive index.

Composition	CdS
Density	4.35 g/ml
Molecular Weight	144.48
Refractive Index	e=2.506, w=2.529

Additional Images

Cadmium yellow at 500x
Cadmium yellow at 500x in polarized light

Resources and Citations

I. Fiedler, M. Bayard, "Cadmium yellows, oranges and reds", Artists Pigments, Volume 1, R. Feller (ed.), Cambridge University Press: Cambridge, 1986.

Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, Pigment Compendium, Elsevier Butterworth-Heinemann, Oxford, 2004.

R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966 Comment: density = 4.35 and ref. index = 2.35-2.48

Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)

Pigments Through the Ages: http://webexhibits.org/pigments/indiv/technical/cdyellow.html - e=2.506, w=2.529

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

The Dictionary of Art, Grove's Dictionaries Inc., New York, 1996 Comment: 'Pigments'

Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000