NOVEL PROCESS FOR THE PREPARATION OF INDIGOTINDISULFONATE SODIUM (INDIGO CARMINE)
This invention relates to an improved method for the preparation of highly or substantially pure Indigotindisulfonate sodium (1). It further relates to the novel crystalline form I of Indigotindisulfonate sodium (1) and the process for its preparation.
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(2018/07/29)
AN IMPROVED PROCESS FOR THE PREPARATION OF INDIGO CARMINE
The present invention relates to an improved process for preparation of Indigo carmine of Formula (I), in high purity more than 99.5%.