An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
[Physico-chemical characteristics of commercial thiazine dyes. 2. Qualitative and quantitative investigations on the impurity of the dye stuffs and the "unsolubility" for the achievement of higher purity]
[Physico-chemical characteristics of commercial thiazine dyes. 2. Qualitative and quantitative investigations on the impurity of the dye stuffs and the "unsolubility" for the achievement of higher purity]