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cas 123-31-9 Supply pharmaceutical grade hydroquinone powder HQ 1 4-Benzenediol

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    1977-9-8 · CAS No.:123-31-9 对苯二酚合成路线 共计: 487条合成路线 77-95-2 123-31-9

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    1. Hydroquinone is organic compounds. White crystalline powder. 2. Hydroquinone is toxic. Adult takes 1 gram by accident, can have headache, dizziness, tinnitus, pale complexion and other symptoms. 3. Hydroquinone is highly flammable in flames. 4. Hydroquinone can react with strong oxidizer. 5.

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    Hydroquinone: 123-31-9: Hydroquinone is used as a pharmaceutical to treat acne and other greasy skin conditions in combination with other acne treatments such as sulfur. It is used as an anti-dandruff agent in shampoo and sunscreen cosmetics. It is also used as a chemical intermediate to synthesis pharmaceuticals and other organic compounds.

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    2015-2-19 · Prepare a cyanogen iodide solution by adding 4.0 mL of concentrated NH 4 OH, 6.5 g of KCN, and 5.0 mL of a 1.0 N solution of I 2 to 50 mL of reagent water in a volumetric flask and dilute to 100.0 mL. After digestion of the sample, adjust the pH of the digestate to >7 to prevent the formation of HCN under acidic conditions.

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    1989-1-1 · Some of the discussed compounds are abietic acid, acetaldehyde, acetamide, acetaminophen, acetanilide, acetic acid, acetic anhydride, acetone, acetonitrile, 9-acridinecarboxaldehyde, adrenaline butyl ether, benzyl alcohol, benzyl benzoate, benzyl butyl phthalate, and benzyl butyl sebacate. several compounds discussed are benzyl hexyl phthalate ...

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    ----- CAS Registry Number: 52-68-6 Page 1 of 4 EPA CHEMICAL PROFILE INTERIM Date: October 31. 1985 Revision: CHEMICAL IDENTITY -- TRICHLOROPHON CAS Registry Number: 52-68-6 Synonyms: Phosphonic Acid, (2,2,2-Trichloro-l-Hydroxyethyl)-, Dimethyl Ester; 0,0-Dimethyl 2,2,2-Trichloro-l-Hydroxyethylphosphonate; Phoschlor; Proxol; Soldep ...

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    EPA proposes to correct the analyte name to 2,2'-oxybis(1-chloropropane), which matches the CAS Number 108-60-1. The original analyte name bis(2-chloroisopropyl)ether has a CAS number of 39638-32-9. EPA is unaware that this chemical has ever been in industrial production, and is therefore unlikely to be a compound of monitoring concern.

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    ----- Office of Pesticides EPA 560/13-80-040(a) and Toxic Substances (TS-799) Washington, DC 20460 Toxics Integration Information Series Chemical Activities Status Report Second Edition Volume I C.ompiled under the direction of: Eleanor T. Merrick With the assistance of: Patricia Grim Daryl Kaufman Alicemary Leach Data in this publication is current as of July 1980

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    2015-2-19 · Prepare a cyanogen iodide solution by adding 4.0 mL of concentrated NH 4 OH, 6.5 g of KCN, and 5.0 mL of a 1.0 N solution of I 2 to 50 mL of reagent water in a volumetric flask and dilute to 100.0 mL. After digestion of the sample, adjust the pH of the digestate to >7 to prevent the formation of HCN under acidic conditions.

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