Mast Cell, Animal

Controls Slides Histopathology Mast Cell

Validation Stain: Toluidine Blue
Other Applicable Stains: Giemsa


In animal tissue with specific infection or disease.

(+) Animal Tumor
Adhesive or Charged Slides: 
Superfrost +

Product Options:

Part # 4412A10/Set $49.00
Part # 4412B98/Set $346.00


Tissue:  Positive staining animal tumor.

Fixation: Formalin 10%, Phosphate Buffered (Part 1090).

Section/Glass: Paraffin sections cut at 4 microns on Superfrost™ Plus slides.

Quality Control Stain:  Toluidine Blue quality control stained slide(s) included.

Reactivity: Guaranteed product specific reactivity for one year from date of receipt. Revalidate after one year to verify continued reactivity. 

Storage: 15-30°C in a light deprived and humidity controlled environment.

Before using unstained control slides, review the enclosed stained slide(s) to ensure that this tissue source is acceptable for testing needs.



The enclosed positive control slides are intended to verify histological techniques and reagent reactivity. The intended use is for the qualitative purpose of determining positive or negative results, and not intended for any quantitative purpose. These positive control sections are produced from animal tissue and the negative control sections from human surgical or autopsy tissues under carefully controlled conditions.  Quality control measures are used to deliver control slides that are as consistent as possible. 



With Toluidine Blue Stain for Mast Cells: Individual Stain Solution
Toluidine Blue Stain 0.1%, Aqueous Part 14027



Newcomer Supply Mast Cell, Animal Control Slides are for the positive histochemical staining of mast cells, cells filled with basophilic granules associated with inflammation and allergic reactions, which stain metachromatically with toluidine blue.



  1. Heat dry sections in oven according to your laboratory protocol.
  2. Deparaffinize sections thoroughly in three changes of xylene, 3 minutes each.  Hydrate through two changes each of 100% and 95% ethyl alcohols, 10 dips each.  Wash well with distilled water.
    1. See Procedure Notes #1 and #2.
  3. Place slides in Toluidine Blue Stain 0.1%, Aqueous for 10 minutes.
  4. Rinse well in distilled water.
  5. Dehydrate quickly through two changes each of 95% and 100% ethyl alcohol. Clear in three changes of xylene, 10 dips each; coverslip with compatible mounting medium.
    1. See Procedure Note #3.



Mast cells Deep rose-violet
Background Blue



  1. Drain slides after each step to prevent solution carry over.
  2. Do not allow sections to dry out at any point during procedure.
  3. Metachromasia of mast cell granules is stable and will maintain staining during dehydration steps.
  4. If using a xylene substitute, closely follow the manufacturer’s recommendations for deparaffinization and clearing steps



  1. Carson, Freida L., and Christa Hladik. Histotechnology: A Self-Instructional Text. 3rd ed. Chicago, Ill.: American Society of Clinical Pathologists, 2009.188.
  2. Modifications developed by Newcomer Supply Laboratory.