Lemon yellow

About the chemical structure:

Chemical name:	barium chromate or strontium chromate or mixture of lead chromate + lead sulphate
Formula:	BaCrO4 (barium chromate)
Crystal system:	rhombic
Refractive index:	n/a

Color:

Color Index (C.I.)

PY 35

How can you identify Lemon yellow?

Imaging:

OM: barium yellow is observed as lozenge-shaped extremely fine particles; less fine are the crystalline particles of strontium yellow.

Analytics:

It's identified by means of FTIR and Raman. Distinguished chemically from strontium yellow because it doesn't turn black in hydrochloric acid.

Raman spectra: University College London;

FTIR spectra: IRUG

Usage and handling:

Permanence:	Toxicity:
Lighfast: excellent Degradation processes: very stable	moderately toxic. Inhalation will cause irritation to the lungs and mucous membrane. MSDS: Bariumchemicals

Literature:

Artists’ Pigments A Handbook of Their History and Characteristics, Vol. 1, L. Feller, Ed., Cambridge University Press, London 1986, p. 205-206