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Certificate of Analysis

Ponceau S

Molecular Formula:	C₂₂H₁₂N₄Na₄O₁₃S₄
Molecular Weight:	760.57
CAS No.:	6226-79-5
Storage (From the date of receipt):	3 years -20°C powder
Image:

HPLC: 99.29% purity | NMR: Consistent with structure