13-03308. 3,7-Dinitro-5-oxophenothiazine [Archived]

Nomenclature

CAS number: 574-81-2
3,7-Dinitro-10H-phenothiazine 5-oxide; dinitrodiphenylamine sulfoxide.
C12H7N3O5S; mol wt 305.27.
C 47.21%, H 2.31%, N 13.76%, O 26.21%, S 10.50%.

Description and references

Prepd from thiodiphenylamine and nitric acid: Buchanan, Schryver, Br. Food J. 11, 101 (1908), C.A. 3, 2329 (1909); Kehrmann, Nossenko, Ber. 46, 2818 (1913).

Chemical structure

Properties

Yellowish leaflets from glacial acetic acid, dec 260°. Insol in water and in the usual organic solvents. Sol in ammonia water and in aq solns of alkalies, forming bluish-red solns.

Use

In the determination of tin.

Status

This monograph has been retired and is no longer subject to revision or update.