isophthalic acid

(redirected from 1,3-benzenecarboxylic acid)
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isophthalic acid

[¦ī·sō¦thal·ik ′as·əd]
(organic chemistry)
C6H4(COOH)2 Colorless crystals subliming at 345°C; slightly soluble in water, soluble in alcohol and acetic acid, and insoluble in benzene; used as an intermediate for polyester and polyurethane resins, and as a plasticizer. Also known as meta-phthalic acid.