4,4 ’ -Thiobis-tert-butyl-m-cresol

C22H30O2S 4,4 -thiobis(6-tert-butyl-m-cresol) 96-69-5 25.00 1 0509 2 33520 C23H18N202 2-diphenylacetyl-1,3-indandione-1-hydrazone 5102-79-4 25.00 1.2330 2... 

This compound can be stored in the presence of a trace amount of radical inhibitor such as 4,4 -thiobis(2-tert-butyl-m-cresol) in a freezer for several months without significant decomposition. The checkers recommend that 1 be used as soon as practicable, as they observed significant amounts of polymerization upon storage for 1 month, even in the presence of the radical inhibitor. However, the checkers found that 2 is stable for 3 months in the presence of the inhibitor. 

Thiobis(2-tert-butyl-m-cresol) was purchased from Tokyo Kasei Kogyo Co., Inc. or Aldrich Chemical Company, Inc. and used as received. 

Thiobis(2-tert-butyl-m-cresol) Phenol, 4,4 -thiobis[2-(1,1 -dimethylethyl)-3-methyl- (8) m-Cresol, 4,4 -thiobis[2-tert-butyl- (9) (4120-97-2)... 

Thiobis(6-tert-butyl- m-cresol) TWA 10 mg/m (total), TWA 5 mg/m (resp)... 

THF n. Abbreviation for tetrahydrofiiran. CAS registry number 109-99-9. Additional names Diethylene oxide tetramethylene oxide. Molecular formula C4H8O. Molecular weight 72.11. Percent composition C 66.62%, H 11.18%, and O 22.19%, Literature references Preparation from 1,4-buta-nediol Schmoyer, Case, Nature 187, 592 (1960). Manufactured by catalytic hydrogenation of maleic anhydride Gilbert, Howk, USA 2772293 (1956 to Du Pont) of furan Banford, Manes, USA 2846449 (1958 to Du Pont) Manly, USA 3021342 (1962 to Quaker Oats). Stabilization to prevent excessive peroxide formation on storage with 0.05-1.0% p-cresol, 0.05-0.1% hydroquinone, or less than 0.01-0.1% 4,4-thiobis(6- tert-butyl- m-cresol) ... 

Notes Moderately polar solvent, ethereal odor soluble in water and most organic solvents flammable moderately toxic incompatible with strong oxidizers can form potentially explosive peroxides upon long standing in air commercially, it is often stabilized against peroxidation with 0.5-1.0% (mass/mass) p-oresol, 0.05 -1.0 /o (mass/mass) hydroquinone, or 0.01% (mass/mass) 4,4 -thiobis(6-tert-butyl-m-cresol) can polymerize in the presence of cationic initiators such as Lewis acids or strong proton acids. 

Distearyl thiodipropionate Dilauryl thiodipropionate 4,4 -Thiobis (6-tert-butyl-m cresol)... 

Distearyl thiodipropionate Distearyl thiodijn opionate Distearyl thiodipropionate 4,4 -Thiobis (6-tert-butyl-m-cresol) 4,5 -Thiobis (6-tert-butyl-m-cresol) Distearyl thiodipropionate 4,4 -Thiobis (6-tert-butyl-m-cresol) Distearyl thiodipropionate... 

Nonstaining antioxidants This class of antioxidants is subdivided into four groups phosphites, hindered phenols, hindered bisphenols, and hydroquinones. Hindered bisphenols such as 4,4 -thiobis(6-t-butyl-m-cresol) are the most persistent of the four classes of material. Because of their lower molecular weight, hindered phenols tend to be volatile. Phosphites tend to be used as synthetic rubber stabilizers, and hydroquinones such as 2,5-di-tert-amylhydroquinone are used in adhesives ... 

Dobies [35] has described detailed procedures for determining various antioxidants in PE and PP films. A feature of this method is that it requires only a small polymer sample (5 g) for the determination of down to 0.02% antioxidant compared to sample sizes of up to 1 kg in previously reported procedures. They describe the extraction procedure used for isolating the antioxidants from the polyolefins, the TLC separation of various antioxidants used industrially, and a quantitative determination of the antioxidant to detect 0.02-0.20% of an antioxidant by the use of the double beam scanning densitometer. The six antioxidants he studied were 4,4 -butylidene (2-tert-butyl-5-methyl)phenol 4,4-thiobis(6-tcft-butyl-m-cresol) pentaerythritol tetrakis(3,5-di- er -butyl-4-hydroxyhydrocinnamate) 2,2 -methylenebis(4-methyl-6-tcft-butylphenol) octadecyl (3,5-di-tert-butyl-4-hydroxyphenyl) acetate and 2,6-di-tert-butyl-p-cresol. 

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