Merck, 1041990050, Methyl blue (C.I. 42780)

General description
Methyl blue (C.I.42780), is a dry dye for the preparation of a color staining solution used for the polychrome staining of histological tissue sections of human origin. The dye has a constant dye content and a reliable high quality, which is one of the major precondition for a reproducible diagnostic staining.
Application
for microscopy
Analysis Note
Dye content (spectrophotometrically): ≥ 60 %
Identity
- sodium:
passes test
- UV/VIS-Spectrum: passes test
Absorption maximum λ max (Hydrochloric acid 0.005 mol/l): 595 - 605 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.01 g/l; hydrochloric acid 0.005 mol/l): 675 - 1125
TLC-Test: passes test
Loss on drying (110 °C): ≤ 7 %
Suitability for microscopy: passes test