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
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of girard reagent
after André Girard, 20th century French chemist
Seen and Heard
What made you want to look up Girard reagent? Please tell us where you read or heard it (including the quote, if possible).