Morpholine Knowledge 1-Amino-5-naphthol 5-Amino-1-naphthol

1-Amino-5-naphthol 5-Amino-1-naphthol

1-amino-5-naphthol structural formula

Structural formula

Business number 01U2
Molecular formula C10H9NO
Molecular weight 159.18


Allopurine E,



Numbering system

CAS number:83-55-6

MDL number:MFCD00041826

EINECS number:201-486-9

RTECS number:None

BRN number:None

PubChem number:24863445

Physical property data

1. Properties: colorless crystals

2. Density (g/mL, 25/4℃): Uncertain

3. Relative vapor density (g/mL, Air=1): Uncertain

4. Melting point (ºC): 192

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

6. Boiling point (ºC, 5.2kPa): Uncertain

7. Refractive index: Uncertain

8. Flash point (ºC): Uncertain

9. Specific rotation (º): Uncertain.

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

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

12. Saturation Vapor pressure (kPa, 60ºC): Uncertain

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

14. Critical temperature (ºC): Uncertain

15. Critical pressure (KPa): Uncertain

16. Log value of oil-water (octanol/water) partition coefficient: Uncertain

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

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

19. Solubility: Slightly soluble in water, soluble in alkali solution . The aqueous solution reacts with ferric chloride to form a black precipitate.

Toxicological data

None yet

Ecological data

None yet

Molecular structure data

1. Molar refractive index: 50.21

2. Molar volume (cm3/mol): 124.2

3. Isotonic specific volume (90.2K ): 351.9

4. Surface tension (dyne/cm): 64.3

5. Polarizability (10-24cm3): 19.90

Compute chemical data

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

2. Number of hydrogen bond donors: 2

3. Number of hydrogen bond acceptors: 2

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: 2

6. Topological molecule polar surface area 46.2

7. Number of heavy atoms: 12

8. Surface charge: 0

9. Complexity: 160

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12.���Determine the number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters: 0

14. Uncertain number of chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

None yet

Storage method

This product should be sealed and stored in a cool, dry place.

Synthesis method

It is obtained by alkali melting of 1-naphthylamine-5-sulfonic acid.


Dye intermediates. Used to make azo dyes.

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