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Methylene Blue, Trihydrate (Basic Blue 9)

Blue dye for medical and laboratory use.
SKU: ME140
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Methylene Blue Trihydrate


Methylene Blue Trihydrate, also known as Basic Blue 9 trihydrate, is a fine crystalline powder with the chemical formula C16H18ClN3S . 3H2O. It finds its application in histology, bacteriology (staining), compounding of blood stains, anti-fungus treatment on fish eggs. It can also be used as a protozoacide and a fungicide.


Key Features:

  • Used in histology and bacteriology staining
  • Effective anti-fungus treatment for fish eggs
  • Can be used as a protozoacide and a fungicide
  • Chemical formula: C16H18ClN3S . 3H2O

Product Specifications:

SynonymsBasic Blue 9, trihydrate; Methelyne blue trihydrate; 3,7-Bis(dimethylamino)phenazathionium chloride trihydrate
CAS No.7220-79-3
FormulaC16H18ClN3S . 3H2O
AppearanceFine yellow powder
ApplicationHistology, bacteriology (staining), compounding of blood stains, anti-fungus treatment on fish eggs, protozoacide and fungicide.

Similar Products:

  • Toluidine blue
  • Crystal Violet
  • Safranin O
  • Methylene Green
  • Wright's Stain

Note: These are similar products, and each product is different, so research is required to find the best fit for your needs.

Caution: Handle with care, may cause skin irritation, harmful if swallowed or inhaled. Keep out of reach of children.


Perfect for histologists, bacteriologists and those in need of anti-fungal treatment for fish eggs.
  • Availability: In Stock
  • Model: ME140
  • Brand: ChemicalStore