piperic acid

Piperic acid structural formula

Piperic acid structural formula

Structural formula

Business number 027U
Molecular formula C8H6O4
Molecular weight 166.13

piperonyl acid,

3,4-methylenedioxybenzoic acid,

Piperonylic acid,

1,3-Benzodioxole-5-carboxylic acid

Numbering system

CAS number:94-53-1

MDL number:MFCD00005830

EINECS number:202-342-8

RTECS number:DF4912765

BRN number:150206

PubChem number:24887362

Physical property data

1. Properties: white prismatic or needle-like crystals.

2. Density (g/mL, 20℃): Undetermined

3. Relative vapor density (g/mL, air=1): Undetermined

4. Melting point (ºC): 229

5. Boiling point (ºC, normal pressure): Undetermined

6. Boiling point (ºC, KPa): Undetermined

7. Refractive index: Undetermined

8. Flash point (ºC): Undetermined

9. Specific rotation (º): Undetermined

10. Autoignition point or ignition temperature (ºC): Undetermined

11. Vapor pressure (mmHg, 25ºC): Undetermined

12. Saturated vapor pressure (kPa , ºC): Undetermined

13. Heat of combustion (KJ/mol): Undetermined

14. Critical temperature (ºC): Undetermined

15 . Critical pressure (KPa): Undetermined

16. Log value of oil-water (octanol/water) distribution coefficient: Undetermined

17. Explosion upper limit (%, V/V ): Undetermined

18. Lower explosion limit (%, V/V): Undetermined

19. Solubility: Slightly soluble in water, chloroform, cold ethanol, and ether.

Toxicological data

1. Acute toxicity: mouse intraperitoneal LD50: >800mg/kg;

Ecological data

Slightly harmful to water.

Molecular structure data

1. Molar refractive index: 39.34

2. Molar volume (cm3/mol): 113.1

3. Isotonic specific volume (90.2K ): 324.7

4. Surface tension (dyne/cm): 67.8

5. Polarizability (10-24cm3): 15.59

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): None

2. Number of hydrogen bond donors: 1

3. Number of hydrogen bond acceptors: 4

4. Number of rotatable chemical bonds: 1

5. Number of tautomers: none

6. Topological molecule polar surface area 55.8

7. Number of heavy atoms: 12

8. Surface charge: 0

9. Complexity: 192

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

Avoid contact with oxides.

Storage method

Store sealed in a cool, dry place. Make sure the workspace has good ventilation. Keep away from sources of fire and store away from oxidizing agents.

Synthesis method

Piperonal is oxidized with potassium permanganate at 70-80°C to obtain piperonyl acid in a yield of 90-96%.


Organic synthesis intermediates.