PNPP Substrate

Catalog number: 34045B

Thermo Scientific™  Related applications: Protein Assays and Analysis

Error loading your content!

  Catalog number
Select a plan
Unit size
Price ({{currency}}) Your price ({{currency}}) Availability Qty
{{product.sku}} {{product.sku}}
also known as {{product.formattedSku}} 
{{subscriptionDetails.selectedRatePlan.billingPeriod}} {{subscriptionDetails.selectedRatePlan.billingPeriod}} {{product.availability.message}}
Pro add-ons

Your on-site stock

›› {{supplyCenter.scName}}({{scProduct.stockOnHand}} In stock)
›› {{supplyCenter.scName}}(Out of stock)
›› {{supplyCenter.scName}}
This item is not currently available on-site. Depending on your Supply Center settings you may be able to add the item to cart above else use the Order Non-Stocked Items' tab on the Supply Center home page.
Back to top


Thermo Scientific Pierce PNPP (p-nitrophenyl phosphate) is a colorimetric, soluble substrate of alkaline phosphatase for use in ELISA applications.

Features of PNPP (p-nitrophenyl phosphate):

• One-component alkaline phosphatase (AP) substrate
• Absorbance maximum of 405nm
• Develops a yellow hue in solution upon reaction with AP
• Safer to use—contains a non-mercury, non-azide preservative

PNPP (p-Nitrophenyl Phosphate, Disodium Salt) is a widely used substrate for detecting alkaline phosphatase in ELISA applications. When alkaline phosphatase and PNPP are reacted, a yellow water-soluble reaction product is formed. This reaction product absorbs light at 405nm. The substrate is offered in several formats.

Related Products
1-Step™ PNPP Substrate Solution
Pierce™ PNPP Substrate Kit
PNPP Substrate Tablets
For Research Use Only. Not for use in diagnostic procedures.


Product Size: Custom
Substrate Type: AP (Alkaline Phosphatase) Substrate
Detection Method: Colorimetric
Substrate Properties: Chemical Substrate

Contents & storage

Upon receipt store product at 4°C. Product is shipped at ambient temperature.


Manuals & protocols