Chrysoidine

Description

A yellowish orange synthetic monoazo dye discovered independently in 1875 by H.Caro and in 1876 by O.N.Witt. Chrysoidine was the first azo dye to be used on wool and was later used for acrylic, polyester, and nylon fibers. It is also used in ballpoint inks, coloring inks, leather dyes, wood stains, lacquers, and polishes.

For analytical results, see Chrysoidine, Basic Orange 2, CI 11270, LC

Synonyms and Related Terms

C.I. 11270; Chrysoidine; Basic Orange 2; Chrysoidine G; Chrysoidine Y; Chrysoidin (sp); Solvent Orange 3; Astra Chrysoidine R; Brasilazina Orange Y; Calcozine Orange YS

Risks

• Potential for skin sensitization and cancer
• Can form toxic aromatic amines
• Azo dyes can be explosive if suspended in air
• Some azo dyes are toxic to aquatic life and carcinogenic

Physical and Chemical Properties

• Composition = C12H13ClN4
• CAS = 532-82-1
• Molecular Weight = mol. wt. = 248.71
• Maximum abs. = 449 nm

Resources and Citations

• M.R.Van Bommel, M. de Keijzer, 'The Early Azo Dyes, Aniline Yellow, Bismarck Brown, Chrysoidine, Oranges, Fast Red A' Bright Colors from the Past, pp.223-246, July 2025.
• Britannica: Chrysoidine