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Process for the purification of ropinirole hydrochloride

PB Deshpande, PK Luthra… - US Patent 7,863,462, 2011 - Google Patents
... a purification pro- cess for Ropinirole hydrochloride by treating Ropinirole free base with a
reducing agent and then converting it to pure Ropinirole hydrochloride; The reducing agent is
selected from sodium metabisulfite, sodium hyposulfite, sodium hydrosulfite, hydroxylamine ...
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[PDF] Optimization of Process Conditions for Preparing an Iron-polysaccharide Complex by Response Surface Methodology

[PDF] from srce.hrY Zhang… - Chemical and Biochemical Engineering Quarterly, 2011 - hrcak.srce.hr
... Titrate with 0.1 mol L–1 sodium hyposulfite, adding 3 mL of starch indicator solution (1 %),
determining the endpoint potentio- metrically, and continue the titration until the blue color
disappears. ... Each mL of 0.1 mol L–1 sodium hyposulfite is equivalent to 5.585 mg of Fe (iron). ...
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Effect of Wet-Heat and Dry-Heat Processing on Mechanical Properties of PLA Fibers

HT Zou, HL Gan, LX Wang… - Advanced Materials Research, 2011 - Trans Tech Publ
... sample. Resistance of oxidant and reducing agent The PLA fibers were immersed
in hydrogen peroxide (H2O2) and sodium hyposulfite (Na2S2O4) solutions with
1g/L, 5g/L and 10g/L at room temperature for 30 min. After the ...

Unveiling the Right Side: Sidmouth

LJ Kricka - Clinical Chemistry, 2011 - Am Assoc Clin Chem
... It was an instant success. A more lasting solution to image fixing resulted from the
observation made by the astronomer Sir John Herschel (1792–1871) that sodium
hyposulfite (thio- sulfate) had silver-dissolving properties. It ...

International Year of Chemistry 2011: Photography: The Chemistry of an Image

MH Dominiczak - Clinical Chemistry, 2011 - Am Assoc Clin Chem
... It was an instant success. A more lasting solution to image fixing resulted from the observation
made by the astronomer Sir John Herschel (1792–1871) that sodium hyposulfite (thiosulfate)
had silver-dissolving properties. It was Hershel who first used the term "photography.". ...

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