Toluene diisocyanate manufacturer Knowledge 2-Methylanthraquinone 2-Methylanthraquinone

2-Methylanthraquinone 2-Methylanthraquinone

2-methylanthraquinone structural formula

Structural formula

Business number 01UQ
Molecular formula C15H10O2
Molecular weight 222.24
label

Teak Quinone,

β-methylanthraquinone,

2-Methyl-9,10-anthracenedione,

β-Methylanthraquinone,

Techtoquinone,

2-Methyl-9,10-anthracenedione,

Tectochinon,

Aromatic aldehydes, ketones and their derivatives

Numbering system

CAS number:84-54-8

MDL number:MFCD00001235

EINECS number:201-539-6

RTECS number:None

BRN number:2050523

PubChem number:24884160

Physical property data

1. Character: yellow crystal

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

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

4. Melting point (ºC): 175-176

5. Boiling point (ºC, normal pressure): 236~238 (1333pa)

6. Boiling point (ºC, 5.2kPa): Not determined

7. Refractive index: Undetermined

8. Flash point (ºC): 209

9. Specific optical rotation (º): Undetermined

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

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

12. Saturated 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. Explosion lower limit (%, V/V): Undetermined

19 . Solubility: Insoluble in water, soluble in ethanol, ether, benzene and ethyl acetate

Toxicological data

Main irritant effects:

On skin: May cause inflammation.

On eyes: May cause irritation

Sensitization: No known sensitizing effects.

Ecological data

General remarks

Water hazard level 1 (German regulations) (self-assessment via list) This substance is slightly hazardous to water.

Do not allow undiluted or large amounts of product to come into contact with groundwater, waterways or sewage systems.

Do not discharge materials into the surrounding environment without government permission.

Molecular structure data

1. Molar refractive index: 63.49

2. Molar volume (cm3/mol): 175.3

3. Isotonic specific volume (90.2K): 473.1

4. Surface tension (dyne/cm): 53.0

5. Polarizability (10-24cm3): 25.17

Compute chemical data

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

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 2

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: 5

6. Topological molecule polar surface area 34.1

7. Number of heavy atoms: 17

8. Surface charge: 0

9. Complexity: 347

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

1. This product has low toxicity. Can cause allergic eczema, rhinitis, and bronchial asthma. Production equipment should be sealed, the workshop should be well ventilated, and operators should wear protective equipment.

2. Exist in smoke.
 

Storage method

This product should be sealed and stored in a cool, dry place. Packed in lined plastic bags, outer woven bags or iron drums, and stored in a cool, dry and ventilated place. Keep away from fire and heat sources. Store and transport according to general toxic chemicals regulations.

Synthesis method

Heat toluene and anhydrous aluminum trichloride, control the temperature at 45-50°C, add phthalic anhydride under external cooling, and keep the mixture warm until the reaction is complete. The reaction mixture was poured into 10% sulfuric acid aqueous solution, and the product-containing slurry was washed with water, separated into layers, and separated. The solvent layer containing the product is mixed with 5% sodium carbonate solution, filtered, washed, and dried to obtain 2-(p-toluoyl)benzoic acid, which is then heated with fuming sulfuric acid at 115°C for 1 hour to close the loop, and the product is poured into cold water. Obtained by filtering, washing and drying.

Purpose

Can be used as dye intermediates, photosensitive agents for photosensitive resins, and raw materials for organic synthesis.

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