Definition of Girard reagent
: any of several hydrazides that contain a quaternary ammonium radical and are useful especially in separating aldehydes or ketones (as some steroid hormones) from mixtures by forming soluble hydrazones: such as a : a crystalline compound (CH3)3N(Cl)CH2CONHNH2 derived from trimethylamine or betaine —called also Girard T reagent b : a crystalline compound C5H5N(Cl)CH2CONHNH2 derived from pyridine —called also Girard P reagent
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Origin and Etymology of girard reagent
after André Girard, 20th century French chemist
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