4-AMinobenzoic Acid/p-Aminobenzoic Acid/PABA CAS 150-13-0

1. 4-Aminobenzoic acid is an essential nutrient for many human pathogens and serves as a versatile building block in the design of drugs or drug candidates .
2. PABA CAS 150-13-0 is a key intermediate in the manufacture of folic acid, azo dyes, esters, and salts, and is also used as an ultraviolet-blocking ingredient in sunscreens .
3. In the medical field, 4-Aminobenzoic acid is used in cell culture media as vitamin H1 and for preparing local anesthetics and ointments .

1. Store 4-Aminobenzoic acid in a tightly sealed container in a cool, dry, and well-ventilated place, protected from light and away from strong oxidizing agents.
2. Keep PABA CAS 150-13-0 at room temperature, as it is stable under normal conditions, but may degrade upon prolonged exposure to light and air.
3. Handle 4-Aminobenzoic acid using appropriate personal protective equipment including dust mask, eyeshields, and gloves, as it may cause skin, eye, and respiratory irritation .

1. Isolate the spill area, wear full protective equipment including a suitable dust mask, and sweep up solid 4-Aminobenzoic acid into sealed, labeled containers without creating dust.
2. Prevent PABA CAS 150-13-0 from entering drains or waterways, and wash the spill site thoroughly with water after material pickup is complete.
3. Personnel cleaning 4-Aminobenzoic acid spills must dispose of waste according to local environmental regulations.

1. 4-Aminobenzoic acid is classified with GHS signal word "Warning" and causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335) .
2. PABA CAS 150-13-0 may cause an allergic skin reaction (H317) and is considered harmful in large amounts, with symptoms of overdose including nausea, vomiting, diarrhea, and dizziness .
3. Thermal decomposition of 4-Aminobenzoic acid produces toxic fumes including carbon oxides and nitrogen oxides; it has a melting point of 370-372°F (188-189°C) and a vapor pressure of 4.5X10-6 mm Hg at 25°C .