2,5-DI-tert-BUTYLHYDROQUINONE

PRODUCT IDENTIFICATION
CAS NO. 88-58-4

2,5-DI-TERT-BUTYLHYDROQUINONE

EINECS  NO. 201-841-8
FORMULA [(CH3)3C]2C6H2-1,4-(OH)2
MOL WT. 222.33

H.S. CODE

 2907.29.9000

UN NO.

 

TOXICITY

 
SYNONYMS 2,5-Bis(1,1-dimethylethyl)-1,4-benzenediol; 2,5-Di-tert-butylquinol;
DTBHQ; Santovar O; 2,5-Di-tert-butylbenzene-1,4-diol; 2,5-Di-tert-butylhydrochinon (German); 2,5-Di-terc-butilhidroquinona (Spanish); 2,5-Di-tert-butylhydroquinone (French); Di-t-butylhydroquinone;
SMILES C(c1c(cc(C(C)(C)C)c(c1)O)O)(C)(C)C

CLASSIFICATION

 Antioxidant, Enzyme inhibitor, Hydroquinone

EXTRA NOTES

 Biochem Action: Ca2+-ATPase antagonist

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE off-white crystalline powder

MELTING POINT

 215 C
BOILING POINT 321 C
SPECIFIC GRAVITY 1.07

SOLUBILITY IN WATER

 Insoluble
pH  
VAPOR DENSITY  

REFRACTIVE INDEX

 

NFPA RATINGS

Health: 1, Flammability: 1, Reactivity: 0

AUTOIGNITION

421 C

FLASH POINT

216 C

STABILITY Stable under ordinary conditions

EXTERNAL LINKS & GENERAL DESCRIPTION

Wikipedia Linking (Hydroquinone)

Material Safety Data Sheet

Google Scholar Search

Local:
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.

DTBHQ is used as an inhibitor, antioxidant, and stabilizer. It is useful as an antioxidant for rubber products, a stabilizer, and an anti-skinning agent in paints.
SALES SPECIFICATION

APPEARANCE

 off-white crystalline powder
ASSAY

98.0% min

WATER

0.1% max

TRANSPORTATION
PACKING  
HAZARD CLASS  
UN NO.  
SAFETY INFORMATION
Hazard Symbols: XN, Risk Phrases: 10-20-36/37/38, Safety Phrases: 9-16-26-33-37/39
PRICE INFORMATION