IP Library › Granted Patent US 11,499,050
Granted Patent B2
US 11,499,050 · App. 17/150,123 · Granted Nov 15, 2022

Process for the preparation of indigotindisulfonate sodium (indigo carmine)

Inventors: Manik Reddy Pullagurla (Hyderabad, IN); Jagadeesh Babu Rangisetty (Hyderabad, IN)
Assignee: PROVEPHARM LIFE SOLUTIONS S.A.
C09B7/02C09B67/0025
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Quick Facts
Patent No.
US 11,499,050
App. No.
17/150,123
Granted
Nov 15, 2022
Kind
B2
Abstract

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.

Claims (6)

1. A crystalline Indigotindisulfonate sodium of formula (I)

comprising one or more of the following

i) less than 0.15% of compound A;

ii) less than 0.15% of compound B;

iii) less than 0.15% of compound C;

iv) less than 2 ppm of arsenic and lead combined.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 29, 2022
From: BIOPHORE INDIA PHARMACEUTICALS PVT. LTD.
To: PROVEPHARM LIFE SOLUTIONS S.A.
Reel/Frame 061568/0216 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 11, 2021
From: PULLAGURLA, MANIK REDDY; RANGISETTY, JAGADEESH BABU
To: BIOPHORE INDIA PHARMACEUTICALS PVT. LTD.
Reel/Frame 055236/0477 →
Priority Claims (1)
IN 201641044154 · Dec 23, 2016 · national
Continuity (2)
Division 16471999
Related Publication 20210206978A1 · Jul 8, 2021