Process for preparing methylene blue

Details Process for preparing methylene blue Process for preparing methylene blue

1979-03-08

1980-07-15

Randolph, John D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D27918

Patent

active

042129710

ABSTRACT:
Methylene Blue and the zinc chloride double salt thereof are prepared by using manganese dioxide as the oxidizing agent in the substantial absence of toxic dichromates.

REFERENCES:
patent: 2069670 (1937-02-01), Hoffmann
Venkataraman, The Chemistry of Synthetic Dyes, vol. II, frontispage and pp. 792-793, Academic Press Inc. NY (1952).
Tomioka, Chem. Abstracts, vol. II, pp. 1305 to 1306.
Lubs, The Chemistry of Synthetic Dyes and Pigments, frontispage and pp. 266 to 269, Reinhold Publishing Corp. (NY) (1955).
Highet et al., J. Am. Chem. Soc., vol. 77, pp. 4399 to 4401 (1955).
Barakat et al., Chem. Abstracts, vol. 51, col. 4998 (1957). _
Kendall, General Chemistry, frontispage and 647-652, D-Appleton-Century Co., 1936.

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