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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Indigo Carmine and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Indigo Carmine impurities, metabolites, nitrosamine derivatives (N-NO compounds), and stable isotope-labeled products. These reference standards play a critical role in pharmaceutical R&D, supporting activities such as product formulation, ANDA and DMF submissions, quality assurance, analytical method development, and stability assessments.
All Indigo Carmine-related substances undergo comprehensive characterization and are delivered with complete Certificates of Analysis and supporting analytical documentation to ensure regulatory adherence. Upon request, we can offer EP/USP traceable standards. Our products are routinely re-evaluated to maintain consistent quality and performance.

N-Nitroso Indigo Carmine
CAT No: CL-IGO-NO-01 CAS No: NA Mol Wt: 495.34 Mol F: C16H7N3NA2O9S2 Inv Status: Custom Synthesis
Chemical Name: Sodium (z)-1-Nitroso-3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonate
N-Nitroso Indigo Carmine Impurity 1
CAT No: CL-IGO-NO-02 CAS No: NA Mol Wt: 495.34 Mol F: C16H7N3NA2O9S Inv Status: Custom Synthesis
Chemical Name: Sodium (z)-1-Nitroso-3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonate
N-Nitroso Indigo Carmine Impurity 3
CAT No: CL-IGO-NO-03 CAS No: NA Mol Wt: 478.4 Mol F: C16H6N4O10S2 Inv Status: Custom Synthesis
Chemical Name: Sodium (z)-1,1'-diNitroso-3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonate
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