Products

Eosin Y Stock Stain 1%, Aqueous

(use: Counterstain for H&E Stain.)

Product Options:

Part # 1080B 500 ml $13.10
Part # 1080C 1 L $18.30
Part # 1080D 1 gal $59.00

STAIN SOLUTION: 

Part 1080B Part 1080C Part 1080D
Eosin Y Stock Stain 1%, Aqueous 500ml 1 Liter 1 Gallon

 

Additionally Needed For H&E Staining:

Hematoxylin and Eosin (H&E) Control Slides Part 4278
Xylene, ACS Part 1445
Alcohol, Ethyl Denatured, 100% Part 10841
Alcohol, Ethyl Denatured, 95% Part 10842
Acetic Acid, Glacial, ACS Part 10010
Hematoxylin Stain, Harris Modified
                      OR
Hematoxylin Stain, Harris		 Part 1201
    OR
Part 12013
Acid Alcohol 1% Part 10011
Lithium Carbonate, Saturated Aqueous
                       OR
Scott Tap Water Substitute		 Part 12215
    OR
Part 1380
Alcohol, Ethyl Denatured, 70% Part 10844

 

For storage requirements and expiration date refer to individual product labels.

 

APPLICATION:

Newcomer Supply Eosin Y Stock Stain 1%, Aqueous provides the key component of an Eosin Y Working Solution in the routine hematoxylin and eosin stain and can be used in either manual or automated staining platforms.  Eosin’s particular value is in its ability to distinguish between the cytoplasm of different types of cells by staining cytoplasmic components differing shades and intensities of pink to red.

The routine hematoxylin and eosin (H&E) stain is used for screening specimens in anatomic pathology, as well as for research, smears, touch preps and other applications.  Its two primary coloring agents stain all cellular material including nuclei (blue), and cytoplasmic elements (pink-red).  Popularity of this stain is due, in large measure, to its simplicity, ability to clearly demonstrate a wide variety of different tissue components, dependability, repeatability, and speed of use.

Quality Control: Since hematoxylin and eosin staining is the foundation of the diagnostic process, maintaining quality is of critical importance. Change staining solutions on a regular basis according to laboratory protocol.  Procedures will vary between laboratories depending upon volume of slides, automation vs manual staining, chemical hygiene and solution integrity.  The longevity of eosin depends upon these factors and stain quality should be regularly screened with the use of an H&E control slide.

 

METHOD:

Fixation:  Formalin 10%, Phosphate Buffered (Part 1090)
Technique:  Paraffin sections cut at 5 microns
Solutions:  All solutions are manufactured by Newcomer Supply, Inc.

Standard Eosin Y Working Solution:

Eosin Y Stock Stain 1%, Aqueous  200 ml
Alcohol, Ethyl Denatured, 95% 600 ml
Acetic Acid, Glacial, ACS 4 ml

 

Combine all solutions and mix well.  Store at room temperature for up to one year.

 

H&E STAINING PROCEDURE WITH EOSIN Y:

  1. 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.
  1. Stain with Hematoxylin Stain, Harris Modified (Part 1201) or Hematoxylin Stain, Harris (Part 12013) 1-5 minutes, depending on preference of nuclear stain intensity.
  2. Wash well in three changes of tap water.
  3. Differentiate quickly in Acid Alcohol 1%.
  1. See Procedure Note #3.
  1. Rinse immediately in three changes of tap water.
  2. Blue slides in Lithium Carbonate, Saturated Aqueous (Part 12215) or Scott Tap Water Substitute (Part 1380) for 10 dips.
  3. Wash in three changes of tap water; rinse in distilled water.
  4. Drain excess water from rack/slides; proceed to 70% alcohol for 10 dips.
  5. Counterstain in Eosin Y Working Solution for 30 seconds to 3 minutes, depending on preference of intensity.
  6. Dehydrate in two changes of 95% ethyl alcohol for 1 minute each and two changes of 100% ethyl alcohol, 10 dips each.   Clear in three changes of xylene, 10 dips each; coverslip with compatible mounting medium.

 

RESULTS:

Nuclei Blue
Erythrocytes and eosinophilic granules Pink to red
Cytoplasm and other tissue elements Various shades of pink

 

PROCEDURE NOTES:

  1. Drain staining rack/slides after each step to prevent solution carry over.
  2. Do not allow sections to dry out at any point during staining procedure.
  3. Differentiate for a length of time to suit preference of nuclear stain intensity.  Check slides microscopically to assure hematoxylin intensity is satisfactory.  Nuclei should be distinct and the background very light to colorless.
  4. If using a xylene substitute, closely follow the manufacturer’s recommendations for deparaffinization and clearing steps.

 

REFERENCES:

  1. Bancroft, John D., and Marilyn Gamble. Theory and Practice of Histological Techniques. 6th ed. Oxford: Churchill Livingstone Elsevier, 2008. 123-126.
  2. Carson, Freida L., and Christa Hladik Cappellano. Histotechnology: A Self-instructional Text. 4th ed. Chicago: ASCP Press, 2015. 116-117
  3. Luna, Lee G. Histopathologic Methods and Color Atlas of Special Stains and Tissue Artifacts. Gaitheresburg, MD: American Histolabs, 1992. 86-87, 91-92.
  4. Sheehan, Dezna C., and Barbara B. Hrapchak. Theory and Practice of Histotechnology. 2nd ed. St. Louis: Mosby, 1980. 143-144, 153-154.
  5. Modifications developed by Newcomer Supply Laboratory.