2-Cyanophenothiazine;CAS 38642-74-9

Item

Specification

Appearance

Yellow to greenish, fine to coarse powder

Identification

The retention time of the principal peak in the sample should match with the retention time of the working standard as obtained from assay by HPLC test

Loss on Drying

≤0.5%

Sulphated ash

≤0.5%

Any other impurity

≤0.2%

Total impurity

≤1.5%

2-Chorophenothiazine

≤0.5%

2-carboxamide-phenothiazine

≤0.5%

Cyanophenothiazine dimer

≤0.3%

Assay(HPLC)

97.0%~102.0%