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The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet for this chemical from a reliable source such as eChemPortal search query 94-36-0, and follow its directions.
Benzoyl peroxide is usually prepared by treating hydrogen peroxide with benzoyl chloride under alkaline conditions. 2 C 6 H 5 COCl + H 2 O 2 + 2 NaOH → (C 6 H 5 CO) 2 O 2 + 2 NaCl + 2 H 2 O. The oxygen–oxygen bond in peroxides is weak. Thus, benzoyl peroxide readily undergoes homolysis (symmetrical fission), forming free radicals: (C 6 H 5 ...
Benzoyl peroxide and hydrogen peroxide are used as bleaching and "maturing" agents for treating flour to make its grain release gluten more easily; the alternative is letting the flour slowly oxidize by air, which is too slow for the industrialized era. Benzoyl peroxide is an effective topical medication for treating most forms of acne.
Concentration: The strength of your over-the-counter benzoyl peroxide will range from 2.5% to 10%. The strength you use will depend on your skin type and its tolerance. For example, if you have ...
Cobalt salts are the most common type of promoter used. Common radical initiators used are organic peroxides such as benzoyl peroxide or methyl ethyl ketone peroxide. [8] Polyester resins are thermosetting and, as with other resins, cure exothermically. The use of excessive initiator especially with a catalyst present can, therefore, cause ...
The peroxide value is defined as the amount of peroxide oxygen per 1 kilogram of fat or oil. Traditionally this was expressed in units of milliequivalents, although in SI units the appropriate option would be in millimoles per kilogram (N.B. 1 milliequivalents = 0.5 millimole; because 1 mEq of O2 =1 mmol/2 of O2 =0.5 mmol of O2, where 2 is valence).
Benzoyl peroxide ((PhC)OO) 2) generates benzoyloxyl radicals (PhCOO•), each of which loses carbon dioxide to be converted into a phenyl radical (Ph•). Methyl ethyl ketone peroxide is also common, and acetone peroxide is on rare occasions used as a radical initiator, too. Inorganic peroxides function analogously to organic peroxides.
Erythromycin/benzoyl peroxide, sold under the brand name Benzamycin, is a topical gel containing of 5% benzoyl peroxide and 3% erythromycin primarily used to treat acne. [1] Erythromycin/benzoyl peroxide is a prescription medication.