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N1891

Sigma-Aldrich

SIGMAFAST p-Nitrophenyl phosphate Tablets

tablet, To prepare 5 mL

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Synonym(s):
pNPP tablets
MDL number:

Quality Level

form

tablet

solubility

deionized water: soluble 5 mL

storage temp.

−20°C

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This Item
N2770F464843173
solubility

deionized water: soluble 5 mL

solubility

water: 0.25 tablet/mL, clear, colorless

solubility

water: 1 tablet/mL, clear to hazy, colorless to faintly yellow

solubility

-

storage temp.

−20°C

storage temp.

−20°C

storage temp.

−20°C

storage temp.

-

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

Application

SIGMA FAST p-Nitrophenyl phosphate Tablets has been used:
  • to quantify non-secreted alkaline phosphatase to monitor differentiation of osteoblast-like cells (SaoS-2)
  • to stain murine preosteoblast MC3T3-E1 cells in alkaline phosphatase assay
  • as a substrate for ExtrAvidin® alkaline phosphatase to measure hemoglobin-bound α-synuclein using enzyme-linked immunosorbent assay (ELISA)
  • as a substrate for alkaline phosphatase conjugated antibodies for detection in ELISA of abirin toxin
Developed for use as a soluble substrate for the detection of alkaline phosphatase activity in Enzyme Immunoassays (EIA). pNPP is the substrate of choice in high sensitivity alkaline phosphatase-based EIA assays.One pNPP tablet and one Tris buffer tablet are dissolved in deionized water and provide a ready-to-use substrate. Each Sigma FAST pNPP tablet set yields a solution containing 1.0 mg/ml pNPP, 0.2 M Tris buffer. EIA applications using pNPP may be read in timed assays or stopped with 3N NaOH for delayed readings. SIGMAFAST require only the addition of distilled or deionized water to prepare an active substrate solution. Tablets are individually packaged in foil packets.

Reconstitution

Each tablet set dissolved in 5 mL deionized water yields a ready-to-use buffered solution containing pNPP.

Legal Information

ExtrAvidin is a registered trademark of Merck KGaA, Darmstadt, Germany
SIGMAFAST is a trademark of Sigma-Aldrich Co. LLC

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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International journal of clinical and experimental pathology, 12(5), 1757-1763 (2020-01-15)
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Articles

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.

Protocols

ELISA Procedures

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