para-aminobenzoic acid


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p-aminobenzoic acid

 (PAB) (PABA) [ah-me″no-ben-zo´ik]
a substance required for the synthesis of folic acid by many organisms; it is included in the B vitamin complex, although it is not an essential nutrient for humans. It is synthesized by many bacteria; sulfonamides act by blocking its synthesis; it also absorbs ultraviolet light, specifically UVB rays, and is used as aminobenzoic acid as a topical sunscreen.

para-aminobenzoic acid

/para-ami·no·ben·zo·ic ac·id/ (par″ah-ah-me″no-ben-zo´ik) aminobenzoic acid.

para-aminobenzoic acid

(păr′ə-ə-mē′nō-bĕn-zō′ĭk, -ăm′ə-)
n.
See PABA.

para-aminobenzoic acid

a compound that is a growth factor for certain bacteria that use it to synthesize folic acid. Sulfonamides act by blocking a step in this synthesis. Abbreviated PAB, PABA.
References in periodicals archive ?
SYNERA is contraindicated in patients with a known history of sensitivity to lidocaine, tetracaine, local anesthetics of the amide or ester type, or any other component of the product and in patients with para-aminobenzoic acid (PABA) hypersensitivity.
US 7,326,408 B2: A method for increasing the compliance in the use of topical sunscreens comprising a photostable, chemically stable and physically stable formulation for topical application to the skin for treating acne vulgaris and protecting skin from the harmful effects of chronic exposure to the sun comprising a vehicle, one or more sunscreen agents dissolved or suspended in the vehicle, which sunscreen agent is selected from the group consisting of titanium dioxide, zinc oxide, bisoctrizole, anisotriazine, para-aminobenzoic acid (PABA) and derivatives has been assigned to Dow Pharmaceutical Sciences, Petaluma, CA.
Studies have suggested that high levels of para-aminobenzoic acid (PABA) - found in liver - can darken grey hair.