Structure

4-Aminobenzoic acid

CAS
150-13-0
Catalog Number
ACM150130-4
Category
Amino Acids
Molecular Weight
137.14
Molecular Formula
H2NC6H4CO2H

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Specification

Description
4-Aminobenzoic acid, also known as para-aminobenzoic acid (PABA), is utilized as a precursor in the synthesis of aromatic amines and azo dyes.
Synonyms
para-Aminobenzoic acid, PABA, Vitamin Bx, Vitamin H1
IUPAC Name
4-aminobenzoic acid
Canonical SMILES
Nc1ccc(cc1)C(O)=O
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
187-189 ℃(lit.)
Flash Point
159.4ºC
Density
1.374
Solubility
ethanol: 50 mg/mL, clear, colorless to faintly yellow
Appearance
White to off white crystalline powder
Application
4-Aminobenzoic acid is used: As a building block in the synthesis of Polyamides As a substrate in folic acid production In the synthesis of Schiff base As an organic ligand in metal-organic framework (MOFs) synthesis
Assay
≥99%
Beilstein
471605
Biological Source
synthetic (organic)
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
1
EC Number
205-753-0
Exact Mass
137.047678g/mol
Form
powder
Formal Charge
0
Hazard Codes
Xi
Hazard Statements
Xn,Xi
H-Bond Acceptor
3
H-Bond Donor
2
Heavy Atom Count
10
HS Code
29224995
LogP
1.54820
MDL Number
MFCD00007894
Monoisotopic Mass
137.047678g/mol
NACRES
NA.22
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)
PSA
63.32
PubChem ID
24891403
Quality Level
100
Reaction Suitability
reaction type: solution phase peptide synthesis
Refractive Index
1.5795
Rotatable Bond Count
1
RTECS Number
DG1400000
Safety Description
26-36-37/39
Stability
Stable. Incompatible with strong oxidizing agents. Combustible. Sensitive to light and air. May discolour on exposure to light.
Storage Conditions
2-8ºC
Storage Temperature
2-8℃
Supplemental Hazard Statements
H302-H315-H317-H319-H335-H413
Symbol
GHS07
UNII
TL2TJE8QTX
Vapor Pressure
3.45E-05mmHg at 25°C
WGK Germany
3
XLogP3
0.8

Downstream Synthesis Route 1

  • 137-09-7
  • 150-13-0
  • 13676-47-6

Reference: [1] Journal of Heterocyclic Chemistry, 1969, vol. 6, p. 119 - 121

Downstream Synthesis Route 2

  • 150-13-0
  • 95-86-3
  • 13676-47-6

Reference: [1] Patent: WO2010/111483, 2010, A1, . Location in patent: Page/Page column 83

Downstream Synthesis Route 3

  • 150-13-0
  • 99071-54-2

Reference: [1] Patent: US2011/281865, 2011, A1,

Downstream Synthesis Route 4

  • 91-22-5
  • 98-88-4
  • 150-13-0
  • 582-80-9

Reference: [1]Chemische Berichte,1910,vol. 43,p. 2578

Downstream Synthesis Route 5

  • 1004-75-7
  • 5221-17-0
  • 150-13-0
  • 119-24-4

Reference: [1]Journal of the American Chemical Society,1948,vol. 70,p. 20,21,22

Downstream Synthesis Route 6

  • 1004-75-7
  • 3475-39-6
  • 150-13-0
  • 119-24-4

Reference: [1]Chemische Berichte,1949,vol. 82,p. 333,336

* For details of the synthesis route, please refer to the original source to ensure accuracy.

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