4-Nitrophenyl phosphate disodium salt hexahydrate (pNPP) 100 mg, capsules alkaline phosphatase substrate, Sigma-Aldrich®

Supplier: Merck


M-Clarity™ quality level = MQ200

SIALP5869-10CAPEA 293 EUR
SIALP5869-10CAP SIALP5869-25CAP
4-Nitrophenyl phosphate disodium salt hexahydrate (pNPP) 100 mg, capsules alkaline phosphatase substrate, Sigma-Aldrich®
4-Nitrophenyl phosphate disodium salt hexahydrate (pNPP)

Phosphatase substrate has been used as a substrate in tartrate-resistant acid phosphatase (TRAP) assay and alkaline phosphatase (ALP). Substrate for the determination of acid and alkaline phosphatases.


Chromogenic substrate for use with alkaline and acid phosphatase ELISA procedures. Produces a soluble end product that is yellow in color and can be read spectrophotometrically at 405 nm. The pNPP reaction may be stopped with 3 N NaOH and read at 405 nm.

Formula: C₆H₄NNa₂O₆P·6H₂O
MW: 371,144 g/mol
Melting Pt: 300 °C
MDL Number: MFCD00066288
CAS Number: 333338-18-4

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