2,5-di-tert-butylhydroquinone

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:88-58-4

MDL number:MFCD00008825

EINECS number:201-841-8

RTECS number:MX5160000

BRN number:2049542

PubChem number:24861465

Physical property data

1. Properties: white or yellowish crystal.

2. Relative density (g/mL, 25/4℃): 1.02～1.08

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

4. Melting point (ºC): 217～219

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

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

7. Refractive index: Undetermined

8. Flash point (ºC): Undetermined

9. Specific rotation (º): Undetermined

10. Autoignition point or ignition Combustion 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. Logarithmic 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: Soluble in ethanol, acetone, ethyl acetate and carbon disulfide, slightly soluble in benzene, gasoline, insoluble in water .

Toxicological data

None

Ecological data

None

Molecular structure data

Molecular property data:

1. Molar refractive index: 66.79

2. Molar volume (cm³/mol): 219.6

3. Isotonic specific volume (90.2K): 533.3

4. Surface tension (dyne/cm): 34.7

5. Polarizability (10^{– 24}cm³): 26.47

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): 4.6

2. Number of hydrogen bond donors: 2

3. Number of hydrogen bond acceptors: 2

4. Number of rotatable chemical bonds: 2

5. Number of tautomers: 4

6. Topological molecule polar surface area 40.5

7. Number of heavy atoms: 16

8. Surface charge: 0

9. Complexity: 208

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. White or light yellow crystal. Non-toxic.
2. Soluble in ethanol, acetone, ethyl acetate and carbon disulfide, slightly soluble in benzene and gasoline, and insoluble in water.

Storage method

This product should be stored in a sealed, cool, dry place. Pay attention to fire protection, waterproofing and dustproofing.

Synthesis method

1. Isobutylene After the preparation of isobutanol is vaporized, it is continuously and quantitatively passed through the catalyst activated alumina, and the dehydration reaction is carried out at (380±10)°C. The isobutylene gas generated. After cooling, water separation and drying, it can be used for alkylation.

Anti-aging agent Alba For the preparation, hydroquinone and catalyst sulfuric acid are added into the reaction kettle, and when the temperature is heated to 65°C with stirring, isobutylene is introduced to perform an alkylation reaction. The reaction generates the anti-aging agent Alba, which is washed with 60°C hot water, neutralized with sodium carbonate, and finally washed with 70-80°C water until neutral, cooled to 10-15°C to crystallize, centrifuged and dehydrated, and then dissolved in hot ethanol. Recrystallize to obtain the finished product.

2.Produced by the reaction of hydroquinone and isobutylene. The reaction formula is as follows:

Purpose

1. Used as an antioxidant for natural rubber, synthetic rubber and latex. It can delay the oxidative aging and ultraviolet aging of vulcanized rubber and unvulcanized rubber. It is a non-staining and non-polluting antioxidant that does not pollute rubber products and does not discolor under sunlight. It is better than ordinary antioxidants in terms of oxidation resistance, and can also improve the heat resistance and flex crack resistance of rubber products. The effective mixing amount is0.5-1 copies. This product also has a good anti-aging effect on adhesives. Easily dispersed and has no effect on vulcanization. This product is suitable for manufacturing light-colored rubber products, medical supplies, latex products, adhesive tapes, etc. It can also be used as an antioxidant for oils and synthetic resins. In the plastics industry, it can be used as a heat and light stabilizer for polyolefins and polyformaldehyde.

2.Can delay the oxidative aging and ultraviolet rays of vulcanized rubber and unvulcanized rubber Aging is a non-coloring, non-polluting antioxidant that does not pollute rubber products and does not change color under sunlight. It is better than ordinary antioxidants in terms of oxidation resistance, and can also improve the heat resistance and flex crack resistance of rubber products. Used as an antioxidant for natural rubber, synthetic rubber, synthetic resins, oils and latex. The effective mixing amount is 0.5 to 1 part. The anti-aging effect of adhesives is also ideal. Because it is easy to disperse and has no effect on vulcanization, it is suitable for manufacturing light-colored rubber products, medical supplies, latex products, adhesive tapes, etc. In the plastics industry, it can be used as a heat and light stabilizer for polyolefins and polyformaldehyde.