Description

4-Aminobenzoic Acid (PABA) is a high-purity organic compound with the molecular formula C₇H₇NO₂, widely utilized in biochemical and pharmaceutical research. This white crystalline powder is soluble in water, ethanol, and ether, making it versatile for laboratory applications. As a key intermediate in folate synthesis, PABA is essential for studying metabolic pathways, sunscreen formulations, and bacterial growth inhibition. Our product is rigorously tested for purity (≥98%) and consistency, ensuring reliable performance in sensitive experiments. Suitable for HPLC, UV-spectroscopy, and microbiological assays, it is packaged under inert conditions to maintain stability.

Properties

• CAS Number: 150-13-0
• Complexity: 128
• IUPAC Name: 4-aminobenzoic acid
• InChI: InChI=1S/C7H7NO2/c8-6-3-1-5(2-4-6)7(9)10/h1-4H,8H2,(H,9,10)
• InChI Key: ALYNCZNDIQEVRV-UHFFFAOYSA-N
• Exact Mass: 137.047678466
• Molecular Formula: C7H7NO2
• Molecular Weight: 137.14
• SMILES: C1=CC(=CC=C1C(=O)O)N
• Topological: 63.3
• Monoisotopic Mass: 137.047678466
• Physical Description: P-aminobenzoic acid appears as colorless crystals that discolor on exposure to light and air.
• Color/Form: Monoclinic prisms from dilute alcohol
• Odor: Odorless
• Melting Point: 370 to 372 °F
• Solubility: >20.6 [ug/mL]
• Density: 1.37 – Denser than water; will sink
• Vapor Pressure: 0.000278 [mmHg]
• Stability/Shelf Life: Chemical stability: Stable under recommended storage conditions.
• Dissociation Constants: 4.874
• Synonyms: 4-aminobenzoic acid, 150-13-0, p-aminobenzoic acid, para-aminobenzoic acid, AMINOBENZOIC ACID, Benzoic acid, 4-amino-, Hachemina, Paraminol, Potaba, benzoic acid, 4-amino, Caswell No. 033B, 4-azaniumylbenzoate, p-amino-Benzoic acid, Actipol, CCRIS 6209, EPA Pesticide Chemical Code 233300, UNII-TL2TJE8QTX, BRN 0471605, HSDB 6840, Aminobenzoic acid (USP), Aminobenzoic acid [USP], AI3-02436, NSC 7627, NSC-7627, EINECS 205-753-0, gamma-Aminobenzoate, Trochromogenic factor, AMINOBENZOIC ACID, PARA, Aniline-4-carboxylate, DTXSID6024466, P-AMINO-BENZOATE, DTXCID404466, component of Presun (Salt/Mix), P-AMINOBENZOIC ACID [MI], 4-Aminobenzoate, Potassium, AMINOBENZOIC ACID [MART.], EC 205-753-0, AMINOBENZOIC ACID [USP-RS], AMINOBENZOIC ACID [WHO-DD], 4-AMINOBENZOIC ACID [HSDB], PARA-AMINOBENZOIC ACID [IARC], PARA-AMINOBENZOIC ACID [VANDF], AMINOBENZOIC ACID [USP MONOGRAPH], 4-AMINOBENZOIC ACID [EP IMPURITY], 4-AMINOBENZOIC ACID [EP MONOGRAPH], trichromogenic factor, 4 Aminobenzoic Acid, Potassium Salt, TETRACAINE HYDROCHLORIDE IMPURITY A [EP IMPURITY], PROCAINE BENZYLPENICILLIN IMPURITY A [EP IMPURITY], AMINOBENZOIC ACID (MART.), Paraminan, AMINOBENZOIC ACID (USP-RS), PARA-AMINOBENZOIC ACID (IARC), AMINOBENZOIC ACID (USP MONOGRAPH), 4-AMINOBENZOIC ACID (EP IMPURITY), 4-AMINOBENZOIC ACID (EP MONOGRAPH), TETRACAINE HYDROCHLORIDE IMPURITY A (EP IMPURITY), PROCAINE BENZYLPENICILLIN IMPURITY A (EP IMPURITY), pCarboxyaniline, 4Carboxyaniline, g-Aminobenzoate, Aminobenzoesaeure, 4-amino-benzoate, Jumer Brand of Aminobenzoic Acid, Medea Brand of Aminobenzoic Acid, pCarboxyphenylamine, 4aminobenzoic acid, Llorens Brand of Aminobenzoic Acid, Acido paminobenzoico, g-Aminobenzoic acid, paraAminobenzoic acid, 1Amino4carboxybenzene, Benzoic acid, pamino, Benzoic acid, 4amino, Kyselina paminobenzoova, Llorens Brand of Aminobenzoic Acid Sodium Salt, Benzoic acid, amino-(8CI), CHEBI:22495, Benzoic acid, amino-(8CI)(9CI), Glenwood brand of Potassium Aminobezoate, USEPA/OPP Pesticide Code: 233300, 215-310-3, 4-27-00-07875 (beilstein handbook reference), 4-aminobenzoic acid, potassium salt, alynczndiqevrv-uhfffaoysa-n, einecs 215-310-3, inchi=1/c7h7no2/c8-6-3-1-5(2-4-6)7(9)10/h1-4h,8h2,(h,9,10, nsc 173996, potaba (tn), PABA, Vitamin BX, p-Carboxyaniline, 4-Carboxyaniline, Sunbrella, p-Carboxyphenylamine, 1-Amino-4-carboxybenzene, Pabacyd, Pabafilm, Pabamine, Paranate, Amben, Romavit, Bacterial vitamin H1, Vitamin H’, Anticanitic vitamin, Chromotrichia factor, RVPaba Lipstick, Papacidum, Rvpaba, Trichochromogenic factor, Anti-chromotrichia factor, Super Shade by Coppertone, Benzoic acid, p-amino-, Acidum paraminobenzoicum, MFCD00007894, ABEE, Pabagel, Pabanol, 4-AMINO-BENZOIC ACID, Kyselina p-aminobenzoova, Vitamin H1, p-Aminobenzoesaeure, 4-Aminobenzoesaeure, 4-Carboxyphenylamine, Acido p-aminobenzoico, PAB, gamma-Aminobenzoic acid, Aminobenzoate, Acido p-aminobenzoico [Italian], Kyselina p-aminobenzoova [Czech], para-aminobenzoate, Anticantic vitamin, CHEBI:30753, TL2TJE8QTX, .gamma.-Aminobenzoic acid, Aniline-4-carboxylic acid, CHEMBL542, NCGC00091051-01, CAS-150-13-0, SMR000471833, 4-aminobenzoic-acid, p-amino benzoic acid, 4-ammoniobenzoate, p-carboxy aniline, amino benzoic acid, p-aminobezoic acid, 4-aminobezoic acid, 4 – carboxy-aniline, 4-Amino benzoic acid, 4-(amino)benzoic acid, Antichromotrichia factor, Spectrum_000036, RVPaba lipstick (TN), potassium-p-aminobenzoate, Spectrum2_000123, Spectrum3_000294, Spectrum4_000142, Spectrum5_000778, bmse000066, bmse000887, bmse000916, Epitope ID:115017, SCHEMBL8249, 4-Aminobenzoic acid, 99%, Oprea1_221096, BSPBio_001828, KBioGR_000584, KBioSS_000396, MLS001066325, MLS001335919, MLS001335920, BIDD:ER0375, DivK1c_000783, SCHEMBL313191, 4-aminobenzoic acid zwitterion, SPBio_000166, p-Aminobenzoic acid, Free Acid, SCHEMBL2165513, SCHEMBL6631569, SCHEMBL6633059, 4-Aminobenzoic acid (Standard), SCHEMBL13232108, HY-B1008R, KBio1_000783, KBio2_000396, KBio2_002964, KBio2_005532, KBio3_001328, MSK3401, NSC7627, CHEBI:194474, NINDS_000783, HMS2269E10, HMS3870E13, HMS5083J03, HY-B1008, Tox21_111069, Tox21_201702, Tox21_300087, BDBM50145829, s4510, SBB058665, STK397441, AKOS000118983, Tox21_111069_1, AC-8107, CCG-266139, CS-4505, DB02362, FA17692, IDI1_000783, 4-Aminobenzoic acid, analytical standard, NCGC00091051-02, NCGC00091051-03, NCGC00091051-04, NCGC00253923-01, NCGC00259251-01, AS-12493, BP-31227, NCI60_041683, SY003749, SBI-0051277.P003, DB-028695, 4-Aminobenzoic acid, ReagentPlus(R), 99%, A0269, NS00003125, ST50632536, 4-Aminobenzoic acid, >=98.0% (HPLC/NT), EN300-17988, 4-Aminobenzoic acid, ReagentPlus(R), >=99%, C00568, D02456, Q284959, 4-Aminobenzoic acid, Vetec(TM) reagent grade, 98%, 4-Aminobenzoic acid, purified by sublimation, >=99%, BRD-K58497451-237-10-7, Z57127446, 4-Aminobenzoic acid, 98.5-100.2%, SAJ first grade, 4-Aminobenzoic acid, SAJ special grade, 99.5-100.2%, F2191-0259, 4A5E7DD8-8A22-4642-86BF-05B778C0C78E, 4-Aminobenzoic acid, European Pharmacopoeia (EP) Reference Standard, p-Aminobenzoic acid;Bacterial vitamin H1;p-Carboxyaniline;Vitamin H1, Aminobenzoic acid, United States Pharmacopeia (USP) Reference Standard, Aminobenzoic Acid, Pharmaceutical Secondary Standard; Certified Reference Material

Application

4-Aminobenzoic Acid is a critical precursor in the biosynthesis of folic acid, used to study vitamin deficiencies and metabolic disorders. It serves as a UV-absorbing agent in sunscreen formulations due to its photoprotective properties. Researchers also employ PABA as a growth factor in bacterial culture media, particularly for studying folate-dependent microorganisms.

Safety and Hazards

GHS Hazard Statements

• H315 (32.2%): Causes skin irritation [Warning Skin corrosion/irritation]
• H317 (27.7%): May cause an allergic skin reaction [Warning Sensitization, Skin]
• H319 (33.1%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H335 (32.2%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
• H412 (44.6%): Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P261, P264, P264+P265, P271, P272, P273, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P333+P317, P337+P317, P362+P364, P403+P233, P405, and P501

Hazard Classes and Categories

• Skin Irrit. 2 (32.2%)
• Skin Sens. 1 (27.7%)
• Eye Irrit. 2 (33.1%)
• STOT SE 3 (32.2%)
• Aquatic Chronic 3 (44.6%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.