N7653 Sigma

p-Nitrophenyl Phosphate Liquid Substrate System


Synonym: 4-Nitrophenyl phosphate disodium salt solution, pNPP


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Substrate for alkaline phosphatase that yields a soluble yellow end product that may be read at 405 nm. The reaction may be stopped with 3N NaOH and read at 405 nm. Recommended for ELISA (microwell) procedures, not recommended for membrane applications.


Stable at least one year when stored below 0 °C.

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