2-naphthol-3,6-disulfonic acid disodium salt

structural formula

• numbering system
• physical property data
• toxicological data
• ecological data
• molecular structure data
• computing chemical data
• more
  • properties and stability
  • storage method
  • synthesis method
  • purpose

numbering system

cas number:135-51-3

mdl number:mfcd00065915

einecs number:205-196-3

rtecs number:qj6477000

brn number:3643184

pubchem number:24886100

physical property data

1. properties: colorless and shiny filamentous needle-like crystals, the industrial product is gray-white paste.

2. solubility: soluble in water, ethanol and ether, insoluble in benzene. the aqueous solution has blue-green fluorescence.

toxicological data

reproduction data

oral tdlo: 2mg/kg in female rats from 1 to 20 days after pregnancy;

ecological data

none

molecular structure data

none

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: 7

4. number of rotatable chemical bonds: 0

5. number of tautomers: 3

6. topological molecule polar surface area 151

7. number of heavy atoms: 21

8. surface charge: 0

9. complexity: 501

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: 3

properties and stability

storage method

store sealed in a cool, dry place.

synthesis method

when g salt is prepared by sulfonation and salting out of 2-naphthol, part of r acid is also produced as a by-product. the waste acid after separation of g salt is salted out with sodium chloride to obtain r salt. first add saturated sodium chloride solution to the salting out kettle, preheat to 30°c, then add the r acid solution after sulfonation of 2-naphthol, salting out, and separation of g salt, stir for 1 to 2 minutes, let it stand, and use suction filter. then wash with saturated sodium chloride solution 3 to 4 times and blot dry to obtain the finished product r salt.

purpose

fluorescent indicator. diazonium salt��aromatic amine reagents. organic synthesis.

dye intermediates. mainly used to prepare azo dyes, food pigments, etc.