COA Center



AZUR A For Microscopy

C.I. No. 52005 - An important nuclear staining component of polychrome Methylene blue. Azure A is used for staining cell granules, microorganisms and tissues. A component of MacNeal tetrachrome blood stain and of Romanowsky-type blood stains.
Azure A chloride


5 g (00005)

10 g (00010)

25 g (00025)

1GBA000015 1GBA000015 1GBA000032
Article No. 01606 Grade For Microscopy
Purity CAS No. 531-53-3
Molecular Formula C14H14ClN3S Molecular Weight 291.80
H.S. Code 3204.9000 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour Dark green powder
Melting point/ Freezing point [°C] 290 °C Solubility in water [% weight] Soluble in water


Appearance Dark green powder Absorption maxima (0.003 g/L in water) 625 - 634 nm
Absorptivity (A 1%/1cm; at λmax; in water) Min 1100 Loss on drying (at 110°C) Max 8%

Safety Information and Hazard Symbols

Safety Statement: 22-24/25
Revision Date: 27-Jul-2022

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