Patent ID: 11878021
Assignee: WISTA LABORATORIES LTD.
Field: Pharmaceuticals (Chemistry)
Classification: CPC A  C  Y | IPC A  C

Claim 0:
1. A high-purity diaminophenothiazinium compound of the following formula:, wherein:
each of R1 and R9 is independently —H, C1-4alkyl, C2-4alkenyl, or halogenated C1-4alkyl;
each of R3NA and R3NB is independently C1-4alkyl, C2-4alkenyl, or halogenated C1-4alkyl;
each of R7NA and R7NB is independently C1-4alkyl, C2-4alkenyl, or halogenated C1-4alkyl; and
X is one or more anionic counter ions to achieve electrical neutrality; and wherein high-purity is characterized by:
a purity of greater than 98%;
less than 1% Azure B as impurity;
less than 100 μg/g Aluminium (Al);
less than 1 μg/g Cadmium (Cd);
less than 100 μg/g Chromium (Cr);
less than 300 μg/g Copper (Cu);
less than 10 μg/g Tin (Sn);
less than 200 μg/g Iron (Fe);
less than 10 μg/g Manganese (Mn);
less than 1 μg/g Mercury (Hg);
less than 10 μg/g Molybdenum (Mo);
less than 10 μg/g Nickel (Ni);
less than 10 μg/g Lead (Pb); and
less than 100 μg/g Zinc (Zn).