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Merck

1.15924

Nigrosine (C.I. 50420)

water-soluble for microscopy Certistain®

Synonym(s):

Nigrosine (C.I. 50420)

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About This Item

CAS Number:
101357-32-8
MDL number:
MFCD02179199
EC Index Number:
309-930-4
UNSPSC Code:
41116130

Key Documents

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Product Name

Nigrosine (C.I. 50420), water-soluble for microscopy Certistain®

form

solid

pH

10 (20 °C, 10 g/L in H2O)

solubility

10 g/L

bulk density

750 kg/m3

εmax

200-300 at 570-580 nm in 50% ethanol at 0.025 g/L

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

2-30°C

Quality Level

400

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Analysis Note

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

General description

The dry dye Nigrosin (C.I. 50420) water-soluble for microscopy Certistain®, is used for the preparation of a staining solution for the visualization of capsule (negative capsule staining) in bacteriological material of human origin. As a 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. For more details, please see instructions for use (IFU). The IFU can be downloaded from this webpage.

Legal Information

CERTISTAIN is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_c

Not applicable

Certificates of Analysis (COA)

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