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| 2,2'-METHYLENEBIS(4-ETHYL-6-TERT-BUTYLPHENOL) | ||
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PRODUCT IDENTIFICATION |
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| CAS NO | 88-24-4 |
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| 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; | ||
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CLASSIFICATION |
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PHYSICAL AND CHEMICAL PROPERTIES |
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| PHYSICAL STATE |
white to pale creamy crystalline powder | |
| MELTING POINT | 123 C | |
| BOILING POINT | ||
| SPECIFIC GRAVITY |
1.10 | |
| SOLUBILITY IN WATER |
Negligible | |
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SOLVENT SOLUBILITY |
Soluble in almost organic solvents | |
| AUTOIGNITION | ||
| pH | ||
| VAPOR DENSITY | ||
| NFPA RATINGS | Health: 0 Flammability: 1 Reactivity: 0 | |
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REFRACTIVE INDEX |
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| FLASH POINT | ||
| STABILITY | Stable under ordinary conditions | |
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APPLICATIONS |
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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. |
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| SALES SPECIFICATION | ||
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APPEARANCE |
white to pale creamy crystalline powder | |
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SET POINT |
117 C min | |
| MOISTURE | 0.5% max | |
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ASH CONTENT |
0.3% max | |
| TRANSPORTATION | ||
| PACKING | 25kgs in bag | |
| HAZARD CLASS |
Not regulated | |
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| REMARKS | ||
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