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4-aminoisoquinoline-6-carboxylic acid; CAS No.: 1956332-68-5; 4-aminoisoquinoline-6-carboxylic acid. PROPERTIES: 4-aminoisoquinoline-6-carboxylic acid is a white crystalline powder with molecular formula C10H8N2O2. It has a molar mass of 188.18 g/mol and shows limited solubility in water but good solubility in dilute acids and bases. The compound melts between 235-238 C. Proper storage requires an airtight container in a cool, dry place (below 15 C) protected from light. Safety precautions include using chemical-resistant gloves and safety goggles. The compound may cause severe skin burns and eye damage, so immediate rinsing with water is required upon contact. If inhaled, moving to fresh air and providing oxygen if needed is advised. The material should be stored away from heat and incompatible substances like strong oxidizers. APPLICATIONS: In medicinal chemistry, 4-aminoisoquinoline-6-carboxylic acid serves as a core structure for developing antibacterial agents. Research teams at antibiotic development centers have used this compound to synthesize gyrase inhibitors with activity against multidrug-resistant pathogens. The amino group provides a functionality for forming coordination complexes with metal ions in the enzyme active site. In agrochemical research (though not agricultural application), the compound has been explored as a lead for developing antifungal agents that target fungal respiratory chains. A study published in a pesticide chemistry journal demonstrated how derivatives of this compound inhibited fungal spore germination. Additionally, in materials science, the compound's conjugated system makes it suitable for use in electroactive polymers. Researchers at a polymer science laboratory incorporated 4-aminoisoquinoline-6-carboxylic acid derivatives into conductive polymers for use in flexible electronics applications.