benzidine test
noun
: a sensitive test for the presence of blood (as in urine or feces) based on the production of a blue color upon contact with a solution of benzidine, hydrogen peroxide, and glacial acetic acid
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“Benzidine test.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/benzidine%20test. Accessed 4 Nov. 2025.
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