1,5-dihydroxynaphthalene 1,5-dihydroxynaphthalene

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:83-56-7

mdl number:mfcd00003980

einecs number:201-487-4

rtecs number:qj4740000

brn number:2044951

pubchem number:24893367

physical property data

1. characteristics: white needle-like crystals.

2. density (g/ml,25/4℃): unsure

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

4. melting point (ºc): 265 ℃

5. boiling point (ºc,normal pressure): unsure

6. boiling point (ºc,5.2kpa): unsure

7. refractive index: uncertain

8. flashpoint (ºc): 252℃

9. specific optical rotation (º): unsure.

10. autoignition point or ignition temperature (ºc): unsure

11. vapor pressure (kpa,25ºc): unsure

12. saturated vapor pressure (kpa,60ºc3. isotonic ratio (90.2k):341.1

4. surface tension (dyne/cm):64.4

5. polarizability（10^-24cm³):18.97

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: 3

6. topological molecule polar surface area 40.5

7. number of heavy atoms: 12

8. surface charge: 0

9. complexity: 140

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

this product should be sealed in store in a cool and dry place.

synthesis method

by1,5- naphthalenedisulfonic acid is obtained by alkali fusion and acidification. heat the sodium hydroxide solution to290℃, add while stirring1,5-naphthalenedisulfonic acid, in280-300after adding the temperature between ℃, continue stirring30min . cool and acidify with hydrochloric acid to ph6-7. cool, filter and refine to obtain1,5-dihydroxynaphthalene.

purpose

for organic synthesis, dye intermediates, pharmaceutical intermediates, photographic industry.

rial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh-cn; mso-bidi-language: ar-sa”>℃, add while stirring1,5-naphthalenedisulfonic acid, in280-300after adding between ℃, continue stirring30min. cool and acidify with hydrochloric acid to ph6-7. cool, filter and refine to obtain1,5-dihydroxynaphthalene.

purpose

for organic synthesis, dye intermediates, pharmaceutical intermediates, photographic industry.