CAS 150-13-0 Aminobenzoic Acid, USP - Materials / Alfa Chemistry

NAVIGATION

Aminobenzoic Acid, USP

PRICE INQUIRY

Catalog Number

ACM150130-2

CAS Number

150-13-0

Product Name

Aminobenzoic Acid, USP

Structure

Category

Liquid Crystal (LC) Building Blocks

Description

P-aminobenzoic acid appears as colorless crystals that discolor on exposure to light and air. (NTP, 1992);Solid

IUPAC Name

4-aminobenzoic acid

Molecular Weight

137.14g/mol

Molecular Formula

C7H7NO2;C7H7NO2

Canonical SMILES

C1=CC(=CC=C1C(=O)O)N

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

Melting Point

370 to 372 °F (NTP, 1992);188.5 °C;188.5 °C;188.5°C

Density

1.37 (NTP, 1992)

Solubility

0.04 M;In water, 5,390 mg/L at 25 °C; 6,110 mg/L at 30 °C;One gram dissolves in 90 mL boiling water; in 8 ml alcohol, in 60 mL ether. Soluble in ethyl acetate, glacial acetic acid; slightly soluble in benzene; practically insoluble in petroleum ether.;Freely soluble in alcohol;Soluble in alkalis and ethane (C2H6);Soluble in oxygenated solvents;Soluble in ethanol and ether; slightly soluble in acetone; insoluble in chloroform and benzene;Solubility in 90% ethanol, 11.3% at 9.6 °C; solubility in benzene, 0.06% at 11 °C;The solubility of 4-aminobenzoic acid is 6.1 g/L at 30 °C in water, 125 g/L alcohol and 17 g/L ether; it is soluble in ethyl acetate and glacial acetic acid, slightly soluble in benzene, and practically insoluble in petroleum ether.;6.11 mg/mL;>20.6 [ug/mL]

Application

Aminobenzoic Acid, USP serves multiple purposes due to its versatile chemical properties. This organic compound, structurally known as para-aminobenzoic acid (PABA), is recognized for its light absorption throughout the UVB range, making it a valuable ingredient in sunscreen products. PABA, naturally occurring in colorless needle-like crystal form, can turn light yellow upon exposure to air or light. It is soluble in various solvents such as hot water and ethanol but remains insoluble in water and benzene. In the medical field, it plays a crucial role in synthesizing folic acid by combining with pteridine and glutamic acid, and it is used in certain medicines, including analgesic or anesthetic preparations. Additionally, the potassium salt derivative of PABA is employed as a treatment for fibrotic skin disorders like Peyronie's disease. It also holds significance in nutritional studies where it helps assess the accuracy of 24-hour urine collection. Apart from its role in human health, PABA is also a metabolite in both Escherichia coli and plants, highlighting its broad biological relevance.

Color/Form

Monoclinic prisms from dilute alcohol;Light buff crystals; white when pure;Yellowish to red crystals or prisms;White or slightly yellow crystals or crystalline powder

Complexity

128

Covalently-Bonded Unit Count

EC Number

205-753-0

Exact Mass

137.047678g/mol

Formal Charge

Heavy Atom Count

Log P

0.83 (LogP);log Kow = 0.83;0.83

MeSH Entry Terms

4 Aminobenzoic Acid;4 Aminobenzoic Acid, Potassium Salt;4-Aminobenzoate, Potassium;4-Aminobenzoic Acid;4-Aminobenzoic Acid, Potassium Salt;Aminobenzoate, Potassium;Aminobenzoic Acid (USP);Epit Vit;Epitelplast;Hachemina;Magnesium para-Aminobenzoate;p Aminobenzoic Acid;p-Aminobenzoic Acid;PABA;Pabasan;para Aminobenzoic Acid;para-Aminobenzoate, Magnesium;para-Aminobenzoic Acid;Paraminan;Paraminol;Potaba;Potassium 4 Aminobenzoate;Potassium 4-Aminobenzoate;Potassium Aminobenzoate

Monoisotopic Mass

137.047678g/mol

NSC Number

7627

Odor

Odorless

Other Experimental

May turn slightly yellow on prolonged exposure to light and air;Henry's Law constant = 1.5X10-10 atm-cu m/mole at 25 °C (est);Hydroxyl radical reaction rate constant = 4.0X10-11 cu cm/molecule sec at 25 °C (est)

Rotatable Bond Count

RTECS Number

DG1400000

Stability

Chemical stability: Stable under recommended storage conditions.;Conditions to avoid: Exposure to light. May discolor on exposure to air and light.

UNII

TL2TJE8QTX

Vapor Pressure

4.5X10-6 mm Hg at 25 °C /Extrapolated from measurements at higher temperatures/

XLogP3

0.8

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