1,2,3,4-tetrahydroisoquinoline structural formula

1,2,3,4-tetrahydroisoquinoline structural formula

Structural formula

Business number 023B
Molecular formula C9H11N
Molecular weight 133.19



Numbering system

CAS number:91-21-4

MDL number:MFCD00006896

EINECS number:202-050-0

RTECS number:NX4900000

BRN number:116156

PubChem number:24899955

Physical property data

1. Characteristics: Undetermined

2. Density (g/mL, 25/4℃): Undetermined

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

4. Melting point (ºC): -30-233

5. Boiling point (ºC, normal pressure): 232-233

6. Boiling point (ºC, 5.2kPa): Not determined

7. Refractive index: Undetermined

8. Flash point (ºC): Not determined

9. Specific rotation (º): Undetermined

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

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

12. Saturated vapor pressure (kPa, 60ºC): 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) partition coefficient: Undetermined

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

18. Explosion lower limit (%, V/V): Undetermined

19. Solubility: Not determined

Toxicological data


Ecological data


Molecular structure data

1. Molar refractive index: 41.77

2. Molar volume (cm3/mol): 132.2

3. Isotonic specific volume (90.2K ): 326.3

4. Surface tension (dyne/cm): 37.0

5. Polarizability (10-24cm3): 16.56

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: 1

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: none

6. Topological molecule polar surface area 12

7. Number of heavy atoms: 10

8. Surface charge: 0

9. Complexity: 111

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

None yet

Storage method

Should be sealed and stored in a cool place.

Synthesis method

Reduction of isoquinoline with tin and hydrochloric acid or sodium and ethanol gives 1,2,3,4-tetrahydroisoquinoline.


Used as a reagent for organic synthesis.

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