Structural Formula Vector Image Title: Methylenedigallic Acid CAS Registry Number: 552-21-6 CAS Name: 2,2¢-Methylenebis[3,4,5-trihydroxybenzoic acid] Molecular Formula: C15H12O10 Molecular Weight: 352.25 Percent Composition: C 51.15%, H 3.43%, O 45.42% Literature References: Made by heating a mixture of gallic acid, formaldehyde and dil HCl on the water bath. Properties: Crystals. Insol in cold, sparingly in hot water; sol in alcohol, alkalies.

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