5,5'-Methylenedisalicylic Acid
Title: 5,5¢-Methylenedisalicylic Acid
CAS Registry Number: 122-25-8
CAS Name: 3,3¢-Methylenebis[6-hydroxybenzoic acid]
Additional Names: 4,4¢-dihydroxydiphenylmethane-3,3¢-dicarboxylic acid
Molecular Formula: C15H12O6
Molecular Weight: 288.25
Percent Composition: C 62.50%, H 4.20%, O 33.30%
Literature References: Prepd from salicylic acid and formaldehyde in the presence of sulfuric acid: Clemmensen, Heitman, J. Am. Chem. Soc. 33, 737 (1911).
Properties: Wedge-like cryst from acetone + benzene. Bitter taste. Dec 238° (higher-melting material may be impure). Turns red at 180° and starts giving off CO2. Freely sol in methanol, ethanol, ether, acetone, glacial acetic acid. Very slightly sol in hot water. Practically insol in benzene, chloroform, carbon disulfide, petr ether.
Derivative Type: Bacitracin salt see Bacitracin Methylenedisalicylate
Derivative Type: Diacetyl deriv
Molecular Formula: C15H10O6(CH3CO)2
Molecular Weight: 372.33
Percent Composition: C 61.29%, H 4.33%, O 34.38%
Properties: White powder, mp 142°, practically insol in water, sol in acetone, ethanol.
Melting point: mp 142°

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