Title: Barium Chromate(VI)

CAS Registry Number: 10294-40-3

Additional Names: C.I. 77103; C.I. Pigment Yellow 31; Baryta yellow; lemon yellow; permanent yellow; Steinbühl yellow; ultramarine yellow

Molecular Formula: BaCrO4

Molecular Weight: 253.32

Percent Composition: Ba 54.21%, Cr 20.53%, O 25.26%

Literature References: Prepn: Beyer, Rieman, J. Am. Chem. Soc. 65, 971 (1943); Colour Index vol. 4 (3rd ed., 1971) p 4656.

Properties: Yellow, heavy, monoclinic, orthorhombic crystals. Poisonous! d 4.50. Practically insol in water, dil acetic or chromic acids. Dissolved or dec by mineral acids.

Density: d 4.50

Use: As a pigment almost entirely in anticorrosion jointing pastes to prevent electro-chemical corrosion at junctions of dissimilar metals; some use in artists' colors and in coloring glass, ceramics, porcelain. Also used in metal primers, pyrotechnic compositions.