PC scrolling key

This crossword clue is for the definition: PC scrolling key.
it’s A 16 letters crossword puzzle definition.
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Possible Answers: PGDN.

Last seen on: LA Times Crossword 16 Jun 19, Sunday

Random information on the term “PGDN”:

Nitronous oxideNitrosyl hydride

Nitroxyl (common name) or azanone (IUPAC name) is the chemical compound HNO. It is well known in the gas phase. NO− It is the reduced form of nitric oxide (NO) and is isoelectronic with dioxygen. Nitroxyl can be formed as a reaction intermediate.

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Nitroxyl is produced from the reagents “Angeli’s salt” (Na2N2O3) and “Piloty’s acid” (PhSO2NHOH). Other notable studies on the production of HNO exploit cycloadducts of acyl nitroso species, which are known to decompose via hydrolysis to HNO and acyl acid. Upon photolysis these compounds release the acyl nitroso species which then further decompose.HNO is generated via organic oxidation of cyclohexanone oxime with lead tetraacetate to form 1-nitrosocyclohexyl acetate:

This compound can be hydrolyzed under basic conditions in a phosphate buffer to HNO, acetic acid, and cyclohexanone.

Dichloramine reacts with hydroxyl ion, which can be present in water or comes from water, to yield nitroxyl radical and the chloride ion.

PGDN on Wikipedia