Description Application 2-Nitrobenzyl bromide was used for caging unprotected cysteine-containing or thiophosphorylated peptides in aqueous solution. It can be used in the synthesis of (R)- and (S)-3-amino-3,4-dihydro-1H-quinolin-2-one. Packaging 5, 25 g in glass bottle Biochem/physiol Actions 2-Nitrobenzyl bromide reacts with L-cysteine to form S-2-nitrobenzyl-cysteine which was used for modification of ultra-low-gelling-temperature (ULGT) agarose.