2,2'-METHYLENEBIS(4-ETHYL-6-TERT-BUTYLPHENOL)

PRODUCT IDENTIFICATION

CAS NO 88-24-4

2,2'-METHYLENEBIS(4-ETHYL-6-TERT-BUTYLPHENOL) 

EINECS NO. 201-814-0
FORMULA CH2[C6H2[C(CH3)3](C2H5)OH]2
MOL WT. 368.57
H.S. CODE 2907.19
TOXICITY  
SYNONYMS Bis(3-tert-butyl-5-ethyl-2-hydroxyphenyl) Methane;
2,2'-Methylenebis(4-ethyl-6-tert-butylphenol); Antioxidant 425; 2,2'-methylene bis(6-tert-butyl-4-ethyl-Phenol; Bis(Hydroxy- 2 Tert-butyl-3 Ethyl-5 Phenyl)Methane; 2,2'-Methylene bis(6-(1,1-dimethylethyl)-4- Ethylphenol); 2,2'-Methylene bis(6-tert- butyl-4-ethylphenol); Bis(2-hydroxy-3-tert-butyl- 5-ethylphenyl) Methane; 2,2'-Methylene Bis(6-t-butyl-4-ethylphenol); 2,2'-Methylene Bis(Ethyl-6-tert- butylphenol; 2,2'-Methylene Bis-6-(1,1-dimethylethyl)-4-ethyl-phenol;
SMILES
 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

white to pale creamy crystalline powder

MELTING POINT 123 C
BOILING POINT  
SPECIFIC GRAVITY

1.10

SOLUBILITY IN WATER

Negligible

SOLVENT SOLUBILITY

Soluble in almost organic solvents
AUTOIGNITION  
pH  
VAPOR DENSITY  
NFPA RATINGS Health: 0 Flammability: 1 Reactivity: 0

REFRACTIVE INDEX

 
FLASH POINT  
STABILITY Stable under ordinary conditions

APPLICATIONS

Antioxidant is a substance added in small quantities to hydrocarbons which are susceptible to oxidation, such as rubbers, plastics, foods, and oils to inhibit or slow oxidative processes, while being itself oxidized.  Antioxidants work in two different ways. In primary antioxidants (also called free-radical scavengers), antioxidative activity is implemented by the donation of an electron or hydrogen atom to a radical derivative. These antioxidants are usually hindered amines (p-Phenylene diamine, trimethyl dihydroquinolines, alkylated diphenyl amines) or substituted phenolic compounds with one or more bulky functional groups such as a tertiary butyl at 2,6 position commonly. Butylated hydroxytoluene (BHT) is a common example of hindered phenolic antioxidant. The reaction rate, or carbocation stability, in SN1 mechanism is 3° > 2° > 1° > CH3 (no SN1) so, tertiary alkyl moiety exists in lots of phenolic antioxidant compounds. Primary antioxidants are free radical scavengers which combine with peroxy radicals and break autocatalytic cycle. In secondary antioxidants ( also called peroxide decomposers), activity is implemented by the removal of an oxidative catalyst and the consequent prevention of the initiation of oxidation. Examples of peroxide decomposer type of antioxidant are trivalent phosphorous and divalent sulfurcontaining compound such as sulfides, thiodipropionates and organophosphites. Synergistic effect is expected when primary antioxidants are used together with secondary antioxidants as primary antioxidants are not very effective against the degradation by UV oxidation. Sometimes, chelating agents are added to scavenge metal impurities which can initiate decomposition.

2,2'-Methylenebis(4-ethyl-6-tert-butylphenol) is used as an antioxidant and stabilizer for polymers and rubbers. It is approved to use in food packaging.

SALES SPECIFICATION

APPEARANCE

white to pale creamy crystalline powder

SET POINT

117 C min
MOISTURE 0.5% max

ASH CONTENT

0.3% max

TRANSPORTATION
PACKING 25kgs in bag
HAZARD CLASS

Not regulated

UN NO.

 

REMARKS