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Azure II eosinate, for microscopy, Molar mass (M) 1317,92 g/mol, CAS No. 53092-85-6, Empirical formula C16H18ClN3S · C15H16ClN3S · C20H6Br4Na2O5
Azure II is a mixture of equal parts of the basic coal tar dyes methylene blue, Azure B and eosin. It is mainly used for staining of blood elements (e.g. in Giemsa staining solution, Art. No. T862).
In watery solution it forms Azure B eosinates which cause the so called “Romanowsky-Giemsa effect”, a polychromatic, pH-dependent staining of chromatin.
| Soluble in | Methanol, acetic acid |
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