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1.15924 EMD Millipore

Nigrosine (C.I. 50420)

Nigrosine (C.I. 50420) water-soluble for microscopy Certistain®. CAS 101357-32-8, pH 10 (10 g/l, H₂O, 20 °C)., water-soluble for microscopy Certistain®



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solubility   10 g/l
pH   10 (10 g/l, H₂O, 20 °C)
bulk density   750 kg/m3
shipped in   ambient
storage temp.   Store at +5°C to +30°C.
specifications   Identity
- sodium:
passes test
  - UV/VIS-Spectrum: passes test
  Absorption maximum λ max (ethanol 50 %): 570 - 580 nm
  Spec. Absorptivity A 1%/1cm (λmax; 0.025 g/l; ethanol 50 %): 200 - 300
  TLC-Test: passes test
  Loss on drying (110 °C): ≤ 15 %
  Suitability for microscopy: passes test


Other Notes

The CERTISTAIN® dry dye Nigrosin (C.I. 50420) (watersoluble) is used for the preparation of a staining solution for the visualization of capsule (negative capsule staining) in bacteriological material of human origin.
As CERTISTAIN® dye it is chemically quality-certified according to highest standards and strict specifications. As an IVD product and CE registered, it can be used hassle-free in diagnostics and laboratory accreditations.

Safety & Documentation

Safety Information

HS Code 
3204 12 00
Storage class 
10 - 13 Other liquids and solids
WGK 2 water endangering
Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.
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