Merck, 1041381000, Malachite green oxalate (C.I. 42000)

General description
Malachite green oxalate (C.I. 42000) for microscopy Certistain®, is a dry dye that is used for the preparation of a staining solution that is used for differential spore staining in bacteriological samples of human origin. As CERTISTAIN® dye it is chemically quality-certified according to highest standards and strict specifications.
Application
for microscopy Certistain®
Analysis Note
Dye content (spectrophotometrically): ≥ 90% (als C₄₆H₅₀N₄ *2 C₂HO₄ *C₂H₂O₄)
Identity
- oxalate:
passes test
- UV/VIS-Spectrum: passes test
Absorption maximum λ max (water): 616 - 620 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.003 g/l; water): 1730 - 1960
TLC-Test: passes test
Loss on drying (50 °C / <1 hPa): ≤ 7%
Suitability for microscopy: passes test
Legal Information
CERTISTAIN is a registered trademark of Merck KGaA, Darmstadt, Germany