Used in biomedical research to measure catalase (CAT) enzyme activity in rat tissue samples or biological fluids. Helps assess oxidative stress levels in studies related to aging, neurodegenerative diseases, liver injury, and diabetes. Enables researchers to evaluate antioxidant defense mechanisms in experimental models. Commonly applied in pharmacology and toxicology to monitor the effects of drugs or toxins on cellular oxidative balance. Provides a sensitive and specific quantitative analysis suitable for high-throughput screening in laboratory settings.