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orthophthalic acid

American  
[awr-thuh-thal-ik, -thuhf-thal-] / ˌɔr θəˈθæl ɪk, -θəfˈθæl- /

noun

Chemistry.
  1. phthalic acid1


Etymology

Origin of orthophthalic acid

ortho- + phthalic acid