Product Description: PNPP (Para-nitrophenyl phosphate) disodium is a non-proteinaceous chromogenic substrate for alkaline and acid phosphatases used in ELISA and conventional spectrophotometric assays.
Formula: C6H4NNa2O6P
References: [1]Crowther JR, et al. Evaluation of the use of chromogenic and fluorogenic substrates in solid-phase enzyme linked immunosorbent assays (ELISA). Biologicals. 1990 Oct;18(4):331-6.