Mutagenicity testing of some commonly used dyes

Area of Science:

• Toxicology
• Genetics
• Chemical Safety

Background:

• Dye safety is a significant public health concern.
• Understanding dye mutagenicity is crucial for risk assessment.

Purpose of the Study:

• To assess the mutagenic potential of commonly used dyes and their metabolites.
• To identify dyes that are mutagenic with or without metabolic activation.

Main Methods:

• Salmonella-mammalian microsome mutagenicity test (Ames test) was employed.
• Tested 17 dyes and 16 metabolites/derivatives.
• Utilized Aroclor-induced rat liver microsome preparations (S9) for metabolic activation.

Main Results:

• 3-aminopyrene, lithol red, methylene blue, methyl yellow, neutral red, and phenol red were mutagenic with or without S9.
• 4-aminopyrazolone, 2,4-dimethylaniline, N,N-dimethyl-p-phenylenediamine, methyl red, and 4-phenyl-azo-1-naphthylamine were mutagenic only with S9.
• Orange II was mutagenic only without S9; several azo dyes and metabolites were nonmutagenic.

Conclusions:

• Dye mutagenicity varies significantly, with some requiring metabolic activation.
• Metabolites of some azo dyes were found to be nonmutagenic.
• Further research is needed to fully elucidate the toxicological profiles of these compounds.