Para-aminobenzoic acid (PABA) is an organic compound with the chemical formula C7H7NO2. It is a white crystalline substance commonly used in the synthesis of folic acid and as an intermediate in the production of dyes, pharmaceuticals, and sunscreens. PABA is known for its UV-absorbing properties, making it an effective ingredient in sunblock formulations. It is also used in the treatment of certain skin disorders and as a nutritional supplement for its role in folic acid metabolism. Handling PABA requires care due to its potential to cause skin and respiratory irritation.

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