Technical Data
ImmunoTek™ p-Nitrophenyl Phosphate (pNPP)
Molecular Biology Storage: 4°CShipping: Blue Ice
ImmunoTek™ p-Nitrophenyl Phosphate (pNPP)

p-NPP is a single component reagent system for microwell assay of Calf Intestine Alkaline Phosphatase (CIAP or CAP) labeled probes and is an excellent substrate for phosphatase based ELISA assays.

p-NPP produces a soluble end product which is yellow in color and read at 405-410 nm. Both kinetic and end point determinations can be performed.

p-NPP is the customary phosphate ester used as a substrate for measuring AP activity due to its high solubility in alkaline buffers which affords zero order kinetics and significant molar extinction coefficient of 18600 mol-1cm-1.

Storage and Stability:
Stable for 12 months after receipt at 4°C.

Also Available:
N2600: p-Nitrophenyl Phosphate (pNPP)
N2600-10: p-Nitrophenyl Phosphate (pNPP), 50X Concentrate, 0.19M/Liter
• Single component system
• Exhibits low background levels
• Safe to use - no weighing of hazardous powders
• Save preparation time - use right out of the bottle
• Ultra-low sensitivity
• Minimal lot-to-lot variation

Color: Colorless to slightly yellow

Clarity: Clear

Form: Supplied as a liquid in 0.95M DEA, pH 9.0

Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.