Merck
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N7653

Sigma-Aldrich

p-Nitrophenyl Phosphate Liquid Substrate System

liquid

Synonym(s):
4-Nitrophenyl phosphate disodium salt solution, pNPP
Linear Formula:
O2NC6H4OP(O)(ONa)2
CAS Number:
Molecular Weight:
263.05
MDL number:
PubChem Substance ID:
NACRES:
NA.83

form

liquid

Quality Level

shipped in

wet ice

storage temp.

−20°C

SMILES string

[Na+].[Na+].[O-][N+](=O)c1ccc(OP([O-])([O-])=O)cc1

InChI

1S/C6H6NO6P.2Na/c8-7(9)5-1-3-6(4-2-5)13-14(10,11)12;;/h1-4H,(H2,10,11,12);;/q;2*+1/p-2

InChI key

VIYFPAMJCJLZKD-UHFFFAOYSA-L

General description

The p-Nitrophenyl Phosphate (pNPP) Liquid Substrate System combines p-nitrophenyl phosphate, buffer, and the required magnesium cations in a convenient, ready-to-use, single solution reagent. Producing a soluble end product, pNPP is the substrate of choice in alkaline phosphatase enzyme immunoassays.

Application

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.
p-Nitrophenyl Phosphate Liquid Substrate System has been used as a substrate to determine the activity of alkaline phosphatase in alkaline phosphatase assay.

Packaging

100 mL in glass bottle

Biochem/physiol Actions

4-Nitrophenyl phosphate disodium salt hexahydrate (pNPP) is a non-proteinaceous and non-specific substrate for determining protein tyrosine phosphatase activity. Hydrolysis of pNPP produces p-nitrophenol. It is a common chromogenic substrate for alkaline phosphatase.

Caution

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

Physical form

Ready-to-use.

Pictograms

CorrosionHealth hazard

Signal Word

Danger

Hazard Classifications

Eye Dam. 1 - Met. Corr. 1 - Repr. 2 - Skin Irrit. 2 - STOT RE 2 Oral

Storage Class Code

8B - Non-combustible, corrosive hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

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Articles

High-throughput Screening of Peptide Substrates for Tyrosine Kinases Using PEPscreen® Custom Peptide Library

Review a high-throughput ELISA-based method to identify peptide substrates for class-specific and/or enzyme-specific Protein Tyrosine Kinases (PTKs) that can be utilized for the detection of kinase activity both in vivo and in vitro.

Colorimetric Alkaline Phosphatase and Peroxidase Substrate Detection Systems

Nitroblue Tetrazolium (NBT) is used with the alkaline phosphatase substrate 5-Bromo- 4-Chloro-3-Indolyl Phosphate (BCIP) in western blotting and immunohistological staining procedures. These substrate systems produce an insoluble NBT diformazan end product that is blue to purple in color and can be observed visually.

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