Hydroquinone monobenzyl ether

Scheme C Debenzylation of 4-(Benzyloxy) phenol or hydroquinone monobenzyl ether... 

Natunriss. 48, 304 (1961) Kraus, Pharmazie 19, 41 (1964). Synthesis from acetobromglucose and hydroquinone Man-nich, Arch. Pharm. 250, 547 (1912) from d-D-glucose penta-acetate + hydroquinone monobenzyl ether in the presence ol POClj Jarrett, U.S. pot. 3,201,385 (1965 to Polaroid). Frequently occurs together with methylarbutin in plants, particularly those of the family Ericaceae. 

White granules. Soly is dependent upon the degree of Substitution. Commercial ethyl cellulose has an ethoxy content of 43-50%. A 47% product softens at ]40° and is sol in ethyl acetate, ethylene dichloride, benzene, toluene, xylene, butyl acetate, acetone, methanol, ethanol, hutanol, carbon tetrachloride. To avoid brittleness, ethy] cellulose formulations usually include an antioxidant such as hydroquinone monobenzyl ether, 4-hexylpyrOcatechol, Or diphenylamine. 

Hydroquinone monobenzyl ether p-Hydroxyphenyl benzyl ether Monobenzone ... 

Hydroquinone monobenzyl ether. See Hydroquinone benzyl ether Hydroquinone monoethyl ether. See Hydroquinone ethyl ether Hydroquinone monomethyl ether CAS 150-76-5 EINECS/ELINCS 205-769-8 Synonyms p-Guaiacol HA HQMEE Hydroquinone methyl ether 4-Hydroxyanisole p-Hydroxyanisole MEHQ 4-Methoxyphenol p-Methoxyphenol MME... 

Properties of vulcanized rubber can be further enhanced by the addition of certain organic substances (also known as accelerators) and certain inorganic compounds (also known as activators). Commonly used accelerators are tetramethyl thiouran disulfide and diphenylguanidine. Commonly used activators are oxides and salts of calcium, zinc and lead. To prevent the oxidation of rubber, a little amount (1-2%) of antioxidant such as hydroquinone monobenzyl ether, phenyl p-naphthylamine, etc. are added. ... 

Figure 5.13 Separation of phenolic antioxidants by thin-layer chromatography. Solvent benzene development distance 15 cm indicators (a) borate buffer (b) 0.1% 2,6-dichloro quinonechlorimide in methanol. 1 = hydroquinone monobenzyl ether 2 = 2,6-di-rerr-butyl-phenol 3 = 2,6-di-tert-butyl-4-methyl-phenol 4 = 2,6-di-tcrt-butyl-a-methoxy-4-methyl-phenol 5 = 2-a-methyl-cyclohexyl-4, 6-dimethyl-phenol 6 = butylated hydroxyanisole 7 = butylated hydroxy toluene 8 = 4,4"-bis (2,6-di-terf-butyl-phenol) 9 = 2,2"-methylene-bis (4-methyl-6-terf-butyl-phenol) 10 = 2,2"-methylene-bis (4-ethyl-6-fert-butyl-phenol) Reproduced from Kreiner and Warner, Journal of Chromatography [119]...

Phenolic antioxidants including dicresylol propane and Santonox R ((4-4, -thio-bis-(3-napthyl-6-tert butyl phenol Phenolic antioxidants including Succonox 18, butylated hydroxy toluene, lonol, (2,6-di-tert butyl-p-cresol). Nonox Cl (N-N di-beta napthyl-p-phenylenediamine, Santonox R (4,4 thio-bis-3 methyl-6-tert-butylphenol) Phenolic antioxidants including Agerite Alba ((hydroquinone monobenzyl ether), Agerite Spar (styrenated phenol),... 

Key abbreviation AA, ascorbic acid ADP, ascorbyl dipalmitate AG, ascorbyl glucoside AP, ascorbyl palmitate ARB, arbutin AZA, azelaic acid HQ, hydroquinone HQDM, hydroquinone dimethyl ether HQMB, hydroquinone monobenzyl ether HQME, hydroquinone monoethyl ether HQMM, hydroquinone monomethyl ether HQMP, hydroquinone monopropyl ether HQMPh, hydroquinone monophenyl ether KA, kojic acid MAP, magnesium ascorbyl phosphate. 

Alkylation of the monobenzyl ether of hydroquinone 34 with mesylate 35, gives ether 36. Hydrogenolytic removal of the benzyl group gives phenol 37. This affords cicloprolol (38) when subjected to the standard alkylation scheme 17]. In much the same vein, alkylation of g-hydroxy-phenylethanol 39, obtainable from the corresponding phenylacetic acid, with epichlorohydrin... 

Hydroquinone, monobenzone (Benoquin, the monobenzyl ether of hydroquinone), and mequinol (the monomethyl ether of hydroquinone) are used to reduce hyperpigmentation of the skin. Topical hydroquinone and mequinol usually result in temporary lightening, whereas monobenzone causes irreversible depigmentation. 

Monobenzone is the monobenzyl ether of hydroquinone. Chemically, monobenzone is designated as p-(benzy-loxyjphenol the empirical formula is C13H1202, molecular weight 200.24. Each gram of benoquin cream contains... 

Hydroquinone and the monobenzyl ether of hydroquinone are used as depigment-ing agents in bleach creams and skin lighteners. The latter is a well-known sensitizer, also used in the rubber industry. Fisher (1973, p. 235) found 5% of users allergic to this compound. 

Monobenzone. See Hydroquinone benzyl ether Monobenzylamine. See N-Benzylamine Monobenzyl ether hydroquinone Monobenzyl hydroquinone. See Hydroquinone benzyl ether Monobromobenzene. See Bromobenzene Monobromodichloromethane. See Bromodichloromethane Monobromoethane. See Ethyl bromide Monobromomethane. See Methyl bromide Monobutylamine Mono-n-butylamine. See n-Butylamine... 

Chemical and drug Monobenzyl ether of hydroquinone (MBEH) Hydroquinone... 

Synonyms Agerite alba monobenzone 4-(phenylmethoxy)phenol p-(benzyloxy)phenol hydroquinone benzyl ether p-hydroxy-phenyl benzyl ether benzyl hydroquinone monobenzyl hydroquinone Depigman Pigmex Benzoquin PBP Benoquin Uses antidegradant added to rubber products inhibitor in acrylic resins A... 

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