6-amino-2-naphthalenesulfonic acid

May 17, 2024by admin0

6-amino-2-naphthalenesulfonic acid structural formula

structural formula

business number	025k
molecular formula	c10h9no3s
molecular weight	223.25
label	2-naphthylamine-6-sulfonic acid, broronic acid, 6-amino-2-naphthalenesulfonic acid hydrate, 6-amine-2-naphthalenesulfonic acid, 6-aminonaphthalene-2-sulphonic acid, 2-naphthylamine-6-sulfonic acid monohydrate

numbering system

cas number:93-00-5

mdl number:none

einecs number:202-208-9

rtecs number:none

brn number:none

pubchem id:none

physical property data

1. properties: colorless needle-like crystals.

2. density (g/ml, 25/4℃): undetermined

3. relative vapor density (g/ml, air=1): undetermined

4. melting point (ºc): not determined

5. boiling point (ºc, normal pressure): not determined

6. boiling point (ºc, 5.2kpa): not determined determined

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 (kpa, 25ºc): undetermined

12. saturation 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. lower explosion limit (%, v/v): undetermined

19. solubility: dissolved in 7790 parts of cold water at 20°c. dissolved in 630 parts of boiling water, its aqueous solution (or sodium salt) shows blue fluorescence.

toxicological data

none

ecological data

none

molecular structure data

1. molar refractive index: 58.27

2. molar volume (cm³/mol): 148.6

3. isotonic specific volume (90.2k ): 433.1

4. surface tension (dyne/cm): 72.1

5. polarizability (10^-24cm³): 23.10

compute chemical data

1. hydrophobic parameter calculation reference value (xlogp): -0.1

2. number of hydrogen bond donors: 2

3. number of hydrogen bond acceptors.��: 4

4. number of rotatable chemical bonds: 1

5. number of tautomers:

6. topological molecule polar surface area ( tpsa): 80.4

7. number of heavy atoms: 15

8. surface charge: 0

9. complexity: 322

10. number of isotope atoms: 0

11. number of determined atomic stereocenters: 0

12. number of uncertain atomic stereocenters: 0

13. the number of determined stereocenters of chemical bonds: 0

14. the number of uncertain stereocenters of chemical bonds: 0

15. the number of covalent bond units: 1

properties and stability

none

storage method

none

synthesis method

1. using naphthol as raw material, it is prepared by aminosulfonation. the amination reaction temperature is 100~190℃, and the sulfonation temperature is 160~190℃. the generated 2-naphthylamine-6-sulfonic acid and 2-naphthylamine-7-sulfonic acid is separated by salting out to obtain 2-naphthylamine-6-sulfonic acid.

2. using schiff’s acid as raw material, it is obtained through bucherer reaction.

purpose

dye intermediates. it is a naphthalene dye intermediate used in the manufacture of acidic, direct and mordant azo dyes, etc.