4-Aminobenzoic acid (also known as para-aminobenzoic acid or PABA) is an organic compound with the molecular formula C7H7NO2. PABA is a white crystalline substance that is only slightly soluble in water. PABA is an essential nutrient for some microorganisms and is sometimes called Vitamin Bx. The most well-known property of PABA is as an effective sunscreen, when used topically.
CAS No. 150-13-0
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