Toluene diisocyanate manufacturer Knowledge 2-Hydroxy-1,4-naphthoquinone 2-Hydroxy-1,4-naphthoquinone

2-Hydroxy-1,4-naphthoquinone 2-Hydroxy-1,4-naphthoquinone

2-hydroxy-1,4-naphthoquinone structural formula

Structural formula

Business number 01U8
Molecular formula C10H6O3
Molecular weight 174.15
label

2-Hydroxy-p-naphthoquinone,

2-Hydroxy-p-naphthoquinone,

Lawsone,

Natural Orange 6

Numbering system

CAS number:83-72-7

MDL number:MFCD00001678

EINECS number:201-496-3

RTECS number:QL8200000

BRN number:1565260

PubChem number:24895653

Physical property data

1. Characteristics: bright yellow prismatic crystals.


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


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


4. Melting point (ºC): 195-196(decomposition)


5. Boiling point (ºC,Normal pressure): Undetermined


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


7. Refractive Index: Undetermined


8. Flashpoint (ºC): Undetermined


9. Specific optical rotation (º): Undetermined


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


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


Ecological data

None yet

Molecular structure data

1. Molar refractive index: 44.49


2. Molar volume (m3/mol):117.5


3. isotonic specific volume (90.2K):343.8


4. Surface Tension (dyne/cm):73.2


5. Polarizability10-24cm3):17.63

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): 0.9

2. Number of hydrogen bond donors: 1

3. Number of hydrogen bond acceptors: 3

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: 3

6. Topological molecule polar surface area 54.4

7. Number of heavy atoms: 13

8. Surface charge: 0

9. Complexity: 291

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 and stored in a cool, dry place.

Synthesis method

Will1,2-Naphthoquinone -4-Ammonium sulfonate and sulfur react in methanol to obtain methoxynaphthalene Quinone is then hydrolyzed with sodium hydroxide to obtain2-hydroxy-1,4-Naphthoquinone. Yield58-65%.

Purpose

Hair dye, fungicide .

Number of stereocenters: 0

12. Uncertain number of stereocenters of atoms: 0

13. Determined number of stereocenters of chemical bonds: 0

14. Uncertain number of stereocenters of chemical bonds: 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

Will1,2-Naphthoquinone -4-Ammonium sulfonate and sulfur react in methanol to obtain methoxynaphthalene Quinone is then hydrolyzed with sodium hydroxide to obtain2-hydroxy-1,4-Naphthoquinone. Yield58-65%.

Purpose

Hair dye, fungicide .

This article is from the Internet, does not represent the position of Toluene diisocyanate reproduced please specify the source.https://www.chemicalchem.com/archives/22842

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