Nigrosin Water Soluble C.I. 50420


Nigrosin can be used for negative Staining of bacteria. The shapes and sizes of the organisms are seen as colour-free outlines against the dark background. An advantage of using this method, rather than regular positive stains like methylene blue or carbol fuchsin, is that prior fixation by heat or alcohol is not needed, so the organisms are seen in more life-like shapes. Furthermore, negative staining with nigrosin can reveal some microorganisms that cannot be stained by regular methods

  • Biological Stain
  • Colourant for lacquers and varnishes
  • Manufacture of Marker Pen Inks


Maximum Absorption: 565nm
Solubility: Soluble in water

Hazard Phrases: Not considered harmful under normal laboratory conditions

Cas No: 8005-03-6

HS CODE:32129000


Following the UK’s departure from the EU on 1 January 2021, all European shipments are sent on a DAP Basis (Delivered at Place).

This means that the buyer will be liable for import VAT at their prevailing national rate and for orders over 150€ (including carriage) import duties will become chargeable at your prevailing national rate.

The Duty is ascertained by your national customs authority based on the HS Code of each product. The HS Code is shown in the “European Shipment” section of each product page.


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Additional information

Weight N/A
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10gm, 25gm, 50gm, 100gm