from The Century Dictionary and Cyclopedia
- Used in cumidic acid, a name given to two bibasic acids: a-cumidic acid, C6H2(CH3)2(CO2H)2(1:3:4:6), melts above 320° C. and is also called s-dimethylisophthalic acid; and
β-cumidic acid, C6H2(CH3)2(CO2H)2 (1:4:2:5), sublimes without, melting and is called s-dimethylterephthalic acid.
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