PAR - Partial Apparent

Japanese: PAR - ピーエーアール
PAR - Partial Apparent

Abbreviation for 4-(2-pyridylazo)resorcinol. C 11 H 9 N 3 O 2 (215.21). An analytical reagent. Orange-yellow powder. Slightly soluble in water and alcohols. It produces colored metal chelate complexes that dissolve in organic solvents such as chloroform, so it is widely used as a colorimetric extraction reagent for Co, Cr, Nb, Pb, Sc, and U 4+ , and as a metal indicator in chelate titrations of Cu 2+ , Pb 2+ , and Zn 2+ . The monosodium salt is also called PAR. [CAS 1141-59-9][CAS 16593-81-0:Monosodium Salt]

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

Japanese:

4-(2-pyridylazo)resorcinol(4-(2-ピリジルアゾ)レソルシノール)の略称.C11H9N3O2(215.21).分析試薬の一つ.橙黄色の粉末.水,アルコール類に微溶.クロロホルムなどの有機溶媒に溶解する有色の金属キレート錯体を生成するので,Co,Cr,Nb,Pb,Sc,U4+ の抽出比色試薬として,また,Cu2+,Pb2+,Zn2+ などのキレート滴定における金属指示薬として広く利用されている.なお,一ナトリウム塩もPARという.[CAS 1141-59-9][CAS 16593-81-0:一ナトリウム塩]

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