| tert-Butylhydroquinone Basic information |
| Product Name: |
tert-Butylhydroquinone |
| Synonyms: |
tedinjiduibenerfen;4-[(2-methylpropan-2-yl)oxy]phenol;t-butyl-hydroquinon;Tenox tbhq;Tenox TBHQTBHQ;tenoxtbhq;tert-Butyl-1,4-Benzenediol;tert-butyl-hydroquinon |
| CAS: |
1948-33-0 |
| MF: |
C10H14O2 |
| MW: |
166.22 |
| EINECS: |
217-752-2 |
| Product Categories: |
Isoxazoles ,Oxazoles;Industrial/Fine Chemicals;Anthraquinones, Hydroquinones and Quinones;Alcohols;Monomers;Polymer Science;Organic Building Blocks;Oxygen Compounds;Polyols |
| Mol File: |
1948-33-0.mol |
| |
| |
| tert-Butylhydroquinone Chemical Properties |
| Melting point |
127-129 °C(lit.) |
| Boiling point |
295 °C |
| density |
295 |
| refractive index |
1.4859 (estimate) |
| Fp |
171 °C |
| storage temp. |
Store below +30°C. |
| pka |
10.80±0.18(Predicted) |
| form |
Crystalline Powder |
| color |
White to light tan, may contain black specs |
| Water Solubility |
Slightly soluble in water(10g/L). |
| BRN |
637923 |
| Stability: |
Stable. Incompatible with strong bases, strong oxidizing agents. |
| InChIKey |
BGNXCDMCOKJUMV-UHFFFAOYSA-N |
| CAS DataBase Reference |
1948-33-0(CAS DataBase Reference) |
| NIST Chemistry Reference |
1,4-Benzenediol, 2-(1,1-dimethylethyl)-(1948-33-0) |
| EPA Substance Registry System |
tert-Butylhydroquinone (1948-33-0) |
| Hazard Codes |
Xn |
| Risk Statements |
22-36/37/38 |
| Safety Statements |
26-36-28A |
| RIDADR |
UN3077 |
| WGK Germany |
3 |
| RTECS |
MX4375000 |
| Autoignition Temperature |
855 °F |
| TSCA |
Yes |
| HazardClass |
9 |
| PackingGroup |
III |
| HS Code |
29072900 |
| Hazardous Substances Data |
1948-33-0(Hazardous Substances Data) |
| Provider |
Language |
| Butylhydroquinone |
English |
| SigmaAldrich |
English |
| ACROS |
English |
| ALFA |
English |
| |
| tert-Butylhydroquinone Usage And Synthesis |
| Chemical Properties |
tan powder |
| Uses |
tert-Butylhydroquinone (TBHQ) is an antioxidant that exhibits an excellent stabilizing effect in unsaturated fats and oils. It has good solubility in fats and oils, with a maximum usage level of 0.02% based on the weight of the fat or oil or the fat content of the food product. It shows no discoloration in the presence of iron and produces no discernible flavor or odor. It can be combined with BHA and BHT. It is used in edible fats and vegetable oils to retard rancidity. It is used in potato chips and dry cereal. It is also termed butylhydroquinone and mono-tertiary-butylhydroquinone. |
| Definition |
ChEBI: A member of the class of hydroquinones in which one of the ring hydrogens of hydroquinone is replaced by a tert-butyl group. |
| General Description |
White to light tan crystalline powder or a fine beige powder. Very slight aromatic odor. |
| Air & Water Reactions |
Insoluble in water. |
| Reactivity Profile |
Phenols, such as tert-Butylhydroquinone, do not behave as organic alcohols, as one might guess from the presence of a hydroxyl (-OH) group in their structure. Instead, they react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids (phenol has Ka = 1.3 x 10^[-10]). These materials are incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides. Flammable gas (H2) is often generated, and the heat of the reaction may ite the gas. Heat is also generated by the acid-base reaction between phenols and bases. Such heating may initiate polymerization of the organic compound. Phenols are sulfonated very readily (for example, by concentrated sulfuric acid at room temperature). The reactions generate heat. Phenols are also nitrated very rapidly, even by dilute nitric acid. Nitrated phenols often explode when heated. Many of them form metal salts that tend toward detonation by rather mild shock. tert-Butylhydroquinone is incompatible with oxidizers. |
| Fire Hazard |
tert-Butylhydroquinone is combustible. |
| Contact allergens |
This antioxidant has seldom been reported as a sensitizer, mainly in cosmetics (lipsticks, lip-gloss, hair dyes) or in cutting oils. Simultaneous/cross-reactions have been described to butylhydroxyanisole (BHA) and less frequently to butylhydroxytoluene (BHT), but not to hydroquinone |
| Purification Methods |
Recrystallise the hydroquinone from H2O or MeOH and dry it in a vacuum at 70o. Store it in a dark container. [Stroh et al. Angew Chem 69 699 1957, Beilstein 6 IV 6013.] |
TBHQ, abbreviation for tertiary butylhydroquinone(FDA 21 CFR&172.185), has been regarded internationally as the best Food-grade antioxidant recently and has replaced the traditional antioxidants in oils or fats and oil-containing foods in many countried and regions worldwide. It can be also used in cosmetics. Product Features: Cosmetic tert-butyl hydroquinone as a white crystalline powder, there is a special flavor very light, almost insoluble in water (about 5 ‰ ), dissolved in ethanol, acetic acid, ethyl ester, ether and vegetable oils. Tert-butyl hydroquinone cosmetic boiling point 295, m. P. 126.5 ~ 128.5. Cosmetic tert-butyl hydroquinone for most oils have antiseptic effect defeat ended, the case of iron, copper does not change color, but if the presence of base can be converted to pink. Cosmetic tert-butyl hydroquinone antioxidant superior performance, can effectively inhibit Bacillus subtilis, Staphylococcus aureus, Escherichia coli, bacteria such as shortness of breath and Aspergillus, Aspergillus versicolor, Aspergillus flavus and other microbial growth.
| APPEARANCE |
A PURE WHITE CRYSTAL POWDER |
| SOLUBILITY |
SOLUBLE IN ALCOHOL & PRACTICALLY IN INSOLUBLE IN WATER |
| MELTING RANGE |
126.5 TO 128.5 |
| ASSAY% |
99.924 |
| Tert-BUTYL-p-BENZOQUINONE % |
Not detected |
| 2,5-Di-Tert-BUTYLHYDROQUINONE% |
0.076 |
| HYDROQUINONE (by G.C.) % |
Not detected |
| TOLUENE mg/kg |
Not detected |
| LEAD (as Pb) mg/kg |
<2 |
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