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2,5-Di-tert-butylhydroquinone Basic information Product Name: 2,5-Di-tert-butylhydroquinone Synonyms: BHQ;DBHQ;Dibutylhydroquinone;DI-TERT-BUTYL HYDROQUINONE(2,5-);DI-T-BUTYLHYDROQUINONE;2,5-Di-tert-butylquinol;Di-Tertiary Butylhydroquinone;2,5-DI-TERT-BUTYL-1,4-HYDROQUINONE (DBHQ) CAS: 88-58-4 MF: C14H22O2 MW: 222.32 EINECS: 201-841-8 Product Categories: Signalling;Organic Building Blocks;Anthraquinones, Hydroquinones and Quinones;Oxygen Compounds;Polyols;Calcium signaling;Industrial/Fine Chemicals Mol File: 88-58-4.mol   2,5-Di-tert-butylhydroquinone Chemical Properties Melting point 216-218 °C(lit.) Boiling point 321°C density 1,07 g/cm3 refractive index 1.4576 (estimate) Fp 216 °C storage temp. Store at RT pka 11.89±0.23(Predicted) form Crystalline Powder color Light beige to pink-beige BRN 2049542 Stability: Stable. Incompatible with oxidizing agents. CAS DataBase Reference 88-58-4(CAS DataBase Reference) NIST Chemistry Reference 1,4-Benzenediol, 2,5-bis(1,1-dimethylethyl)-(88-58-4) EPA Substance Registry System 1,4-Benzenediol, 2,5-bis(1,1-dimethylethyl)- (88-58-4)   Safety Information Hazard Codes Xi,Xn Risk Statements 36/37/38-22 Safety Statements 26-24/25 WGK Germany 3 RTECS MX5160000 Autoignition Temperature 790 °F Hazard Note Irritant TSCA Yes HS Code 29072900 MSDS Information Provider Language Dibutylhydroquinone English ACROS English SigmaAldrich English ALFA English   2,5-Di-tert-butylhydroquinone Usage And Synthesis Chemical Properties cream or pale brown solid Definition ChEBI: A member of the class of hydroquinones that is benzene-1,4-diol substituted by tert-butyl groups at position 2 and 5. Biological Activity A selective inhibitor of endoplasmic reticulum Ca 2+ -ATPase. Purification Methods Crystallise the hydroquinone from *C6H6 or AcOH. [Beilstein 6 III 4741.]   2,5-Di-tert-butylhydroquinone Preparation Products And Raw materials Raw materials Hydroquinone-->ISOBUTYLENE-->1,4-Benzenediol, 2-(1,1-dimethylethyl)-5-(2-propen-1-yl)--->2,5-Di-tert-butyl-1,4-benzoquinone-->Allyltributyltin Preparation Products 6-BROMO-1H-INDOLE-2-CARBALDEHYDE-->(6-BROMO-1H-INDOL-2-YL)METHANOL-->6-Bromoindole-2-carboxylic acid-->Ethyl 6-bromoindole-2-carboxylate-->tert-Butylhydroquinone-->2,6-di-tert-butylhydroquinone-->Phenyl-t-butylr