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p-DCB is produced by chlorination of benzene using ferric chloride as a catalyst: . C 6 H 6 + 2 Cl 2 → C 6 H 4 Cl 2 + 2 HCl. The chief impurity is the 1,2 isomer.The compound can be purified by fractional crystallization, taking advantage of its relatively high melting point of 53.5 °C; the isomeric dichlorobenzenes and chlorobenzene melt well below room temperature.
right ear auris dextra a.m., am, AM morning: ante meridiem: nocte every night Omne Nocte a.s., as, AS left ear auris sinistra a.u., au, AU both ears together or each ear aures unitas or auris uterque b.d.s, bds, BDS 2 times a day bis die sumendum b.i.d., bid, BID twice a day / twice daily bis in die gtt., gtts drop(s) gutta(e) h., h hour: hora
Ear drops should only be used in the affected ear. Ear drops are usually used for a short duration of time. Make sure to only use it as prescribed. [7] Cotton buds should not be used to clean the inside of the ear since this can cause inflammation and make things worse. [7] Ear drops should not be used for a ruptured eardrum (a hole or tear in ...
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Ear drops are commonly used to treat swimmer's ear. Ear instillation is the process of introducing otic medication or other liquids into the ear canal . Proper care is needed in delivering such liquids.
Cerumenolytics are administered directly into the ear, which is a form of topical administration that can be specified as "ototopical." [3] [4] Generally, the use of a cerumenolytic involves instilling several drops of the product into the affected ear once or twice daily for a treatment duration of 3 to 5 days.
Antipyrine and benzocaine ear drops is a medication for the treatment of ear pain caused by otitis media. It combines antipyrine , an NSAID , and benzocaine , a local anaesthetic in order to treat ear pain, alongside hydroxyquinoline sulfate, an antiseptic and preservative.