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1,4-Benzoquinone, commonly known as para-quinone, is a chemical compound with the formula C 6 H 4 O 2. In a pure state, it forms bright-yellow crystals with a characteristic irritating odor, resembling that of chlorine, bleach, and hot plastic or formaldehyde. This six-membered ring compound is the oxidized derivative of 1,4-hydroquinone. [4]
The strength of topical hydrocortisone products ranges from 0.1% to 2.5%, which means there could be 1 mg to 25 mg hydrocortisone in 1g of the products. [12] Some formulations for topical hydrocortisone include hydrocortisone 0.5% cream or ointment, hydrocortisone 1% cream or ointment, and hydrocortisone 2.5% cream or ointment. [ 34 ]
The peak level of oral hydrocortisone is 15.3 ± 2.9 (SD) μg/L per 1 mg dose. [11] The time to peak concentrations of oral hydrocortisone is 1.2 ± 0.4 (SD) hours. [11] The topical percutaneous absorption of hydrocortisone varies widely depending on experimental circumstances and has been reported to range from 0.5 to 14.9% in different ...
Benzoquinone (C 6 H 4 O 2) is a quinone with a single benzene ring. There are 2 (out of 3 hypothetical) benzoquinones: There are 2 (out of 3 hypothetical) benzoquinones: 1,4-Benzoquinone , most commonly, right image (also para -benzoquinone, p -benzoquinone, para -quinone, or just quinone)
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Other important examples are 1,2-benzoquinone (ortho-quinone), 1,4-naphthoquinone and 9,10-anthraquinone. The name is derived from that of quinic acid (with the suffix "-one" indicating a ketone), since it is one of the compounds obtained upon oxidation of quinic acid. [ 4 ]
Dithranol or anthralin (USAN and former BAN) is a hydroxyanthrone, anthracene derivative, and is used in medications applied to the skin of people with psoriasis.It is available as creams, ointment or pastes in 0.1 to 2% strengths (Drithocreme, Dithrocream, Zithranol-RR, Micanol, Psorlin, Dritho-Scalp, Anthraforte, Anthranol and Anthrascalp).
The compound is often called 2-hydroxy-1,4-benzoquinone, but the "2-" prefix is superfluous since there is no other hydroxy derivative of 1,4-benzoquinone. The IUPAC name is 2-hydroxycyclohexa-2,5-diene-1,4-dione. It is formed by the reaction of 1,4-benzoquinone with hydrogen peroxide and is a byproduct of the metabolism of phenols, such as 1,2 ...