Related Experiment Videos
[Identification of genotoxic compounds used in leather processing industry]
E Clonfero1, P Venier, M Granella
1Istituto di Medicina del Lavoro dell'Università di Padova.
La Medicina Del Lavoro
|May 1, 1990
Summary
Leather dyes containing carbon black showed low mutagenicity, posing a negligible risk. However, a nitroazo dye (Acid Brown 83) and chromium(VI) contamination in tannins present genotoxic concerns in leather processing.
Area of Science:
- Leather processing safety
- Chemical toxicology
- Environmental health
Background:
- Leather dyes and finishing agents can pose health risks.
- Mutagenicity assessment is crucial for consumer and occupational safety.
Purpose of the Study:
- To evaluate the mutagenic potential of carbon black-based leather dyes.
- To identify mutagens in finished leather products and processing stages.
- To assess the genotoxicity of commercial tanning agents.
Main Methods:
- Bacterial mutagenicity assays (Salmonella typhimurium) with and without metabolic activation (S9 mix).
- Chemical analysis to identify mutagenic compounds.
- In vitro genotoxicity testing (sister chromatid exchanges) in mammalian cells (CHO).
Main Results:
- Four out of seven carbon black dyes yielded mutagenic extracts; responsible compounds were mainly polycyclic aromatic hydrocarbons, with low bioavailability and mutagenic activity.
- Finished leather extracts showed mutagenicity due to a nitroazo dye (Acid Brown 83).
- Most commercial tannins contained genotoxic chromium(VI) contaminants, inducing sister chromatid exchanges in CHO cells.
Conclusions:
- Carbon black-based dyes likely pose a negligible risk due to low mutagenicity and bioavailability.
- Nitroazo dyes and chromium(VI) contamination in tanning agents are significant genotoxic concerns in leather production.
- Further investigation into safer alternatives and stricter quality control for leather processing chemicals is warranted.