Vector Laboratories will be closed on Monday, September 4, in observance of Labor Day. Any orders placed after 2pm PT on Friday, September 1, will be shipped on Tuesday, September 5. Thank you for your understanding.

Levamisole Solution (SP-5000-18)

Purchase this product from 2BScientific


Levamisole Solution, a competitive inhibitor of alkaline phosphatase, is provided in a convenient dropper bottle and can be added to the alkaline phosphatase substrate solution. Tissues can contain endogenous alkaline phosphatase activity that will produce background staining if an alkaline phosphatase detection system and substrate are used.


  • Does not inhibit the isoenzyme used for alkaline phosphatase detection
  • 100x concentrate


Unit Size18 ml
ApplicationsImmunohistochemistry / Immunocytochemistry, Immunofluorescence, In situ hybridization
Recommended Storage2-8 °C
Recommended UsageLevamisole is a reversible inhibitor of alkaline phosphatase, effective against most forms of alkaline phosphatase other than the intestinal isoenzyme. Since the intestinal form of the enzyme is used as the marker enzyme in the VECTASTAIN® ABC-AP Kit, levamisole can be used to inhibit endogenous alkaline phosphatase in most cases.
Concentration125 mM
Blocking ActionEndogenous Alkaline Phosphatase


Technical Information

Levamisole does not inhibit the isoenzyme used for either the VECTASTAIN® ABC-AP reagents or other alkaline phosphatase conjugates. 

One drop of levamisole concentrate is added to 5 ml of substrate solution.

How do I Request a Quote?

To request a quote for products:

  1. Click “Contact Us” in the header bar above;
  2. Click “Customer Service”;
  3. Complete the form and provide the following information in the “Comments” section: note you would like a quote, item number (SKU) and quantity;
  4. Click “Submit”.