67845-93-6 Usage
Description
Hexadecyl 3,5-bis-tert-butyl-4-hydroxybenzoate, also known as UV-2908, is a hindered hydroxybenzoate light stabilizer used in the plastics industry. It is a white to faint yellow powder with a specific gravity of 1.07 at 25℃ and is easily soluble in toluene, chloroform, hexane, and acetone. UV-2908 is characterized by its low volatility, small coloring, and good chemical stability, making it resistant to acids and alkalis.
Uses
Used in Plastics Industry:
Hexadecyl 3,5-bis-tert-butyl-4-hydroxybenzoate is used as a light stabilizer for the protection of polyolefins, polycarbonate, and systems containing flame retardants and thioesters. It is effective in preventing degradation caused by exposure to sunlight or artificial light sources, thus enhancing the longevity and performance of the materials.
Hexadecyl 3,5-bis-tert-butyl-4-hydroxybenzoate is used as an additive for polyolefin plastics, such as PP and PE, to improve their resistance to UV radiation. The general dosage ranges between 0.25% and 1%, depending on the substrate and the performance requirements of the final application.
When used in combination with benzophenone UV stabilizers or phosphite antioxidants, Hexadecyl 3,5-bis-tert-butyl-4-hydroxybenzoate shows a good synergistic effect, further enhancing the stability and durability of the plastics.
benefits
Low volatility, minimal color contribution, good chemical stability, acid and alkali resistant, excellent compatibilty with UV absorbers, HALS, and thioesters, FDA sanctioned to 0.5% in polyolefins
Flammability and Explosibility
Notclassified
Safety
In accordance with good industrial practice, handle with care and avoid unnecessary personal contact. Avoid continuous or repetitive breathing of dust. UV Absorber 2908 is used only with adequate ventilation. Avoid dust formation and ignition sources.
Safety
In accordance with good industrial practice, handle with care and avoid unnecessary personal contact. Avoid continuous or repetitive breathing of dust. Use only with adequate ventilation. Avoid dust formation and ignition sources
Synthesis
1.Add 3,5-di-tert-butyl-4-hydroxybenzoic acid (3.03 g), 1-hexadecanol (4.42 g), toluene (30 ml) and dried ion-exchange resin (1.49 g, 20 wt%) into a two-necked round flask equipped with a magnetic stirrer for 11.5 hours.2.High performance liquid chromatography is adopted to monitor the reaction and determine the component of the reaction mixture.
Check Digit Verification of cas no
The CAS Registry Mumber 67845-93-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,8,4 and 5 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 67845-93:
(7*6)+(6*7)+(5*8)+(4*4)+(3*5)+(2*9)+(1*3)=176
176 % 10 = 6
So 67845-93-6 is a valid CAS Registry Number.
InChI:InChI=1/C31H54O3/c1-8-9-10-11-12-13-14-15-16-17-18-19-20-21-22-34-29(33)25-23-26(30(2,3)4)28(32)27(24-25)31(5,6)7/h23-24,32H,8-22H2,1-7H3
