• Sulfuric acid (H2SO4)
• Carbonic acid (H2CO3)
• Oxalic acid (H2C2O4)
• Succinic acid (H2C4H4O4)
• Glutaric acid (H2C5H6O4)
• Phthalic acid (H2C8H4O4)
• Isophthalic acid (H2C8H4O4)
• Terephthalic acid (H2C8H4O4)