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487663 p-Nitrophenyl Phosphate

This p-Nitrophenyl Phosphate is validated for use in ELISA.

p-Nitrophenyl Phosphate MSDS (material safety data sheet) or SDS, CoA and CoQ, dossiers, brochures and other available documents.

Synonyms: pNPP

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487663
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487663-10ML
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      Description
      OverviewExcellent substrate for alkaline phosphatase-based ELISA assays. Produces yellow soluble end product that can be read at 405 nm to 410 nm. Both kinetic and endpoint determinations can be performed. Supplied as ready-to-use. A ready-to-use diluent is available separately (Cat. No. 487664).
      Catalogue Number487663
      Brand Family Calbiochem®
      SynonymspNPP
      References
      Product Information
      ATP CompetitiveN
      FormClear to slightly yellow tinged liquid
      FormulationSupplied as a 50X concentrate.
      PreservativeNone
      ReversibleN
      Quality LevelMQ100
      Applications
      Application NotesELISA
      Application CommentsFunctionality check performed on the final product in ELISA.

      Suggested procedure for use of p-NPP in alkaline phosphatase-based ELISAs:

      1. Prepare 1X p-NPP Substrate Solution: To 39 parts dH2O add 1 part 50X p-NPP Concentrate and 10 parts p-NPP Substrate Buffer (Cat. No. 487664). Mix well and store protected from light. This diluted reagent is suitable for up to 10 h after preparation.

      Note: Cat. No. 487664 is an AMP (2-amino-2-methyl-1-propanol)-based buffer. Other buffers, e.g. diethanolamine (DEA)-based and 2-amino-2-methyl-1,3-propanediol (AMPD)-based, may also be employed.

      2. Complete all required incubations with antibodies and alkaline phosphatase-labeled probes.
      3. Wash plate wells at least 4 times with Tris-buffered saline (TBS) containing 0.1% Tween®-20 detergent. DO NOT USE PHOSPHATE BUFFERS; inorganic phosphate is a potent inhibitor of alkaline phosphatase.
      4. After the final wash, shake and blot all residual buffer from the wells.
      5. Add 100 µl of 1X p-NPP Substrate Solution (prepared in Step 2) to each well and incubate for 15-60 min. (If a kinetic study is desired, readings at 405 nm may be taken at intermediate intervals).

      [Note: Optimal incubation times may vary depending on the amount of enzyme present. If color develops too quickly, dilution of the probe, antibody, or alkaline phosphatase-labeled reagent may be required.]

      6. Stop the reaction by adding 100 µl 1 N NaOH.
      7. Read absorbance at 405 nm.

      Note: Variations in time, reagent volumes, and temperature may require further standardization by the user.
      Biological Information
      Primary TargetSubstrate for alkaline phosphatase-based ELISA assays
      Physicochemical Information
      Cell permeableN
      Dimensions
      Materials Information
      Toxicological Information
      Safety Information according to GHS
      Safety Information
      Product Usage Statements
      Storage and Shipping Information
      Ship Code Ambient Temperature Only
      Toxicity Standard Handling
      Storage +2°C to +8°C
      Protect from Light Protect from light
      Do not freeze Ok to freeze
      Special InstructionsDiscard if solution turns bright yellow or becomes turbid.
      Packaging Information
      Transport Information
      Supplemental Information
      Specifications
      Global Trade Item Number
      Catalogue Number GTIN
      487663-10ML 04055977200287

      Documentation

      p-Nitrophenyl Phosphate MSDS

      Title

      Safety Data Sheet (SDS) 

      p-Nitrophenyl Phosphate Certificates of Analysis

      TitleLot Number
      487663

      Brochure

      Title
      Protein Phosphatases Technical Bulletin
      Data Sheet

      Note that this data sheet is not lot-specific and is representative of the current specifications for this product. Please consult the vial label and the certificate of analysis for information on specific lots. Also note that shipping conditions may differ from storage conditions.

      Revision20-November-2009 JSW
      SynonymspNPP
      ApplicationELISA
      Descriptionp-Nitrophenyl phosphate supplied as a 50X concentrate (0.19 mol/l). For use with p-NPP Substrate Buffer, Cat. No. 487664.
      Backgroundp-Nitrophenyl phosphate is the most common substrate for alkaline phosphatase-based ELISA assays. Hydrolysis of the phosphate ester liberates p-nitrophenol, a soluble, yellow chromogen that can be measured spectrophotometrically at 405 nm (ε = 1.83 x 104 M-1cm-1). As the reaction is linear, kinetic assays can be performed. Endpoint determinations can also be performed by stopping the reaction with strong base and measuring the absorbance at 405 nm. This p-NPP preparation is a stable, convenient, liquid concentrate in a proprietary solvent.
      FormClear to slightly yellow tinged liquid
      FormulationSupplied as a 50X concentrate.
      PreservativeNone
      CommentsFunctionality check performed on the final product in ELISA.

      Suggested procedure for use of p-NPP in alkaline phosphatase-based ELISAs:

      1. Prepare 1X p-NPP Substrate Solution: To 39 parts dH2O add 1 part 50X p-NPP Concentrate and 10 parts p-NPP Substrate Buffer (Cat. No. 487664). Mix well and store protected from light. This diluted reagent is suitable for up to 10 h after preparation.

      Note: Cat. No. 487664 is an AMP (2-amino-2-methyl-1-propanol)-based buffer. Other buffers, e.g. diethanolamine (DEA)-based and 2-amino-2-methyl-1,3-propanediol (AMPD)-based, may also be employed.

      2. Complete all required incubations with antibodies and alkaline phosphatase-labeled probes.
      3. Wash plate wells at least 4 times with Tris-buffered saline (TBS) containing 0.1% Tween®-20 detergent. DO NOT USE PHOSPHATE BUFFERS; inorganic phosphate is a potent inhibitor of alkaline phosphatase.
      4. After the final wash, shake and blot all residual buffer from the wells.
      5. Add 100 µl of 1X p-NPP Substrate Solution (prepared in Step 2) to each well and incubate for 15-60 min. (If a kinetic study is desired, readings at 405 nm may be taken at intermediate intervals).

      [Note: Optimal incubation times may vary depending on the amount of enzyme present. If color develops too quickly, dilution of the probe, antibody, or alkaline phosphatase-labeled reagent may be required.]

      6. Stop the reaction by adding 100 µl 1 N NaOH.
      7. Read absorbance at 405 nm.

      Note: Variations in time, reagent volumes, and temperature may require further standardization by the user.
      Storage Protect from light
      +2°C to +8°C
      Do Not Freeze Ok to freeze
      Special InstructionsDiscard if solution turns bright yellow or becomes turbid.
      Toxicity Standard Handling