Keep my session open?
Ending In 
Your shopping session has expired.
Your session has expired. For your security, we have logged you out.
Would you like to log in again?

8-Octanoyloxypyrene-1,3,6-trisulfonic acid trisodium salt


Highly polar, highly water soluble lipase substrate is a derivative of HPTS (pyranine) that forms tight micelles in aqueous solutions.

  • Lipase subtrate

Alkyl esters of HPTS (sometimes called Cascade Blue) are well known for their substrate ability to measure esterase activity. Longer chain derivatives function as lipase substrates. Lipase activity can be measured by monitoring the sensitive fluorescence kinetics following the increase in emission of product HPTS (hydroxypyrene trisulfonic acid) as a function of time. The activity of a number of lipases have been measured using this substrate including wheat germ lipase, candida cylindracea lipase as well as carboxylic ester hydrolase and acylase 1. Because of its relatively low pKa value (7.3) under assay conditions, it is partially dissociated to form an anion that shows strong absorption maximizing at 460 nm and fluoresces with very high quantum yield and maximum intensity at 520 nm. Unfortunately, when excited between 440 and 480 nm, the fluorescence intensity is dependent on the pH of the solution, which requires careful pH control. However, when excited at 415 nm (the isosbestic point), no pH dependence of fluorescence intensity at 520 nm is noted.

Formula: C₂₄H₂₁Na₃O₁₁S₃
MW: 650.57 g/mol
CAS Number: 115787-84-3



Expand All / Collapse All
Size Supplier No. VWR Catalog Number Unit Price Quantity
25 mg M1296 101447-544 Each (25mg) Retrieving Restricted
restricted In order to process your orders without delay, we request that you provide the required business documentation to purchase this product.

To order chemicals, medical devices, or other restricted products please provide identification that includes your business name and shipping address via email or fax 484.881.5997 referencing your VWR account number . Acceptable forms of identification are:

  • State issued document with your organization's Federal Tax ID Number
  • State issued document with your organization's Resale Tax ID Number
  • City or County issued Business License
  • State Department of Health Services License
  • Any other ID issued by the State that includes the business name and address

* Please note if your account is within the State of California two of these pieces of identification will be required.
VWR will not lift restrictions for residential shipping addresses.

Expand All / Collapse All
Generate Barcodes Barcode Label Format: 
Generate PDF Catalog Page

Enter Details

Select the article for which you are looking for Certificate

Indicate the Lot Number. This field is mandatory.

Enter Certificate Details

Enter the Lot number:

Choose from recent batch/lot numbers:

Review & Compare Alternatives
We found alternative products that can save you up to  per item-unit.  To compare product details, select up to 3 alternatives below and click Compare Selected. To add items to your basket, enter a quantity and click Add to Basket.

Original Product:

Description Catalog Number Availability Unit Your Price Price Per Qty

A new look and a renewed commitment

Built on the features & resources you know, optimized with innovation from Avantor®. Our new brand symbolizes agility and our ability to adapt to customer needs.

Learn More Start Shopping