Pigment, Substance & Mineral Stains


  • Shelf Life for most Stain Kits is one year from date manufactured.
  • Store Stain Kits at 15-30°C unless otherwise stated.
  • Most Stain Kits include 2 Complimentary Positive Control Slides to be used for the initial verification of staining techniques and reagents.
  • Stain solution groups are sold as individual products under separate part numbers with storage requirements and expiration date designated per bottle.
For a more detailed chart regarding Pigments & Artifacts, click here.
Name Comments Products Part #
Copper Some methods demonstrate copper associated protein rather than copper itself

Copper Stain Kit

Control Slides



Hemosiderin Prussian Blue reaction stains ferric (+3) ions

Iron Stain Kit

Control Slides



Hematoidin Similar to bilirubin often formed as a result of hemorrhage, stains with bile methods but not with iron methods    
Bile Demonstrated when bilirubin is oxidized to biliverdin in an acid staining environment

Bilirubin Stain

Control Slides 



Calcium Black deposits formed when using silver reactions are due to reduction of silver by organic material followed by exposure to strong light

Calcium Stain

Control Slides



Both forms are water soluble, aqueous fixatives should be avoided 
Absolute ethanol is the fixative of choice
Gout - monosodium urate crystals appear yellow when their long axes are aligned parallel to a red compensator filter
Pseudogout -calcium pyrophosphate crystals, appear blue when their long axes are aligned parallel to a red compensator filter

Urates Stain

Control Slides



Melanin Identified by a number of methods can interfere with pathology interpretation if found in large amounts

Melanin Stain

Control Slides



Lipofusin Stains variably but usually PAS positive PAS Stain Kit 9162
Carbon Inert and unreactive, resists removal procedures, commonly found in lung and mediastinal lymph nodes.   
Melanin Can become problematic in large amounts and be removed by a variety of methods Tech Memo
Formalin Formed in unbuffered formalin when pH shifts to acidic, not reactive with iron staining methods Tech Memo
Mercury Deposited as a result of using mercury based fixatives Tech Memo
H = Hazardous
copper stain kit rhodanine

Copper, Rhodanine Stain Kit

Used for the detection of copper and copper-associated protein (CAP) in tissue sections.

Microwave Modification Included

Part # 9113A250 ml kit $113.00H