UV Absorber 2908

UV Absorber 2908 Basic information
Product Name:UV Absorber 2908
Synonyms:UV Absorber 2908;HRsorb-2908;3,5-bis(1,1-dimethylethyl)-4-hydroxy-benzoicacihexadecylester;Benzoicacid,3,5-bis(1,1-dimethylethyl)-4-hydroxy-,hexadecylester;Hexadecyl 3,5-bis-tert-butyl-4-hydroxybenzoate;HEXADECYL 3,5-DI-TERT-BUTYL-4-HYDROXYBENZOATE;3,5-Bis[1,1-dimethylethyl]-4-hydroxybenzoic acid hexadecyl ester;3,5-DI-TERT-BUTYL-4-HYDROXYBENZOIC ACID HEXADECYL ESTER
CAS:67845-93-6
MF:C31H54O3
MW:474.76
EINECS:267-342-2
Product Categories:
Mol File:67845-93-6.mol
UV Absorber 2908 Structure
UV Absorber 2908 Chemical Properties
Melting point 59-61 °C(lit.)
Boiling point 539.2±50.0 °C(Predicted)
density 0.936±0.06 g/cm3(Predicted)
vapor pressure 0.005Pa at 20℃
storage temp. Inert atmosphere,Room Temperature
solubility DMSO (Slightly), Ethyl Acetate (Slightly)
form Solid
pka9.07±0.40(Predicted)
color Off-White
Water Solubility 10μg/L at 20℃
LogP12.332
CAS DataBase Reference67845-93-6(CAS DataBase Reference)
EPA Substance Registry SystemBenzoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-, hexadecyl ester (67845-93-6)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36
WGK Germany 3
RTECS DG4436220
HS Code 2916399090
MSDS Information
ProviderLanguage
SigmaAldrich English
UV Absorber 2908 Usage And Synthesis
Physical propertiesIt is white to faint yellow powder. The specific gravity is 1.07 at 25℃. It is easy soluble in toluene, chloroform, hexane, soluble in acetone etc.
UsesThe product belongs to the class of hindered hydroxybenzoate light stabilizer. UV-2908 is most suitable for the protection of polyolefins, polycarbonate and the systems containing flame retardants and thioesters. It can be used alone or in combination with benzophenone UV stabilizer or phosphite antioxidant, showing good synergistic effect.The dosage of UV-2908 ranges between 0.25% and 1% are recommended for protection. It depends on the substrate and performance requirement of the final application.
UsesDXSORB 2908 is an excellent light stabilizer, low volatility, small coloring, good chemical stability, acid and alkali resistance. Suitable for PP and PE and other polyolefin plastics, the general dosage of 0.25 ~ 0.1%. This product can be used alone or in combination with benzophenone ultraviolet stabilizer or phosphite antioxidant, showing good synergistic effect.
benefitsLow 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 ExplosibilityNotclassified
SafetyIn 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.
SafetyIn 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
Synthesis1.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.
UV Absorber 2908 Preparation Products And Raw materials
3,5-diethylbenzoic acid Dodecyl 4-hydroxybenzoate 3,5-Di-tert-butyl-4-hydroxybenzoic acid 4-Hydroxybenzoic acid 2'-Hydroxy-3-phenylpropiophenone 4-HYDROXYBENZOIC ACID N-NONYL ESTER Buprofezin Butylparaben RARECHEM AL BI 0693 3-TERT-BUTYL-4-HYDROXYBENZOIC ACID 2,6-di-tert-butyl-4-(methoxymethyl)phenol 3,5-Di-tert-butyl-4-hydroxybenzaldehyde BUTYL OLEATE 3-TERT-BUTYL-4-HYDROXYBENZOIC ACID METHYL ESTER 3,5-Dimethylbenzoic acid Methyl acrylate UV Absorber 2908 4-Hydroxy-3,5-dimethylbenzoic acid

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