Isophthalic acid

• CAT Number: M067454
• CAS Number: 121-91-5
• Molecular Formula: C8H6O4
• Molecular Weight: 166.13
• Purity: ≥95%
• Storage: Store at RT
• IUPAC Name: benzene-1,3-dicarboxylic acid
• InChI: InChI=1S/C8H6O4/c9-7(10)5-2-1-3-6(4-5)8(11)12/h1-4H,(H,9,10)(H,11,12)
• InChIKey: QQVIHTHCMHWDBS-UHFFFAOYSA-N
• SMILES: C1=CC(=CC(=C1)C(=O)O)C(=O)O

Isophthalic acid（Cat No.:M067454） is a key organic compound with the molecular formula C8H6O4. Structurally, it consists of a benzene ring with two carboxylic acid groups (-COOH) attached at the meta positions (1,3 positions). Isophthalic acid is widely used in the production of polymers, particularly in the synthesis of polyethylene terephthalate (PET) and various copolyesters. These polymers find extensive applications in the manufacture of fibers, films, and plastic bottles due to their excellent mechanical properties, chemical resistance, and thermal stability. Isophthalic acid’s versatility makes it a fundamental building block in the polymer industry, contributing to the production of numerous everyday items.