3-hydroxy-4-[(E)-(1-hydroxynaphthalen-2-yl)diazenyl]-7-nitronaphthalene-1-sulfonate

• 分子结构分类: 有机化合物 - 苯类化合物 - 萘
• 英文名称: 3-hydroxy-4-[(E)-(1-hydroxynaphthalen-2-yl)diazenyl]-7-nitronaphthalene-1-sulfonate
• 英文别名: 3-hydroxy-4-[(1-hydroxynaphthalen-2-yl)diazenyl]-7-nitronaphthalene-1-sulfonate
• 化学式: C₂₀H₁₂N₃O₇S
• 分子量: 438.397
• InChiKey: GDHWAXDSTKHEAZ-UHFFFAOYSA-M

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  31
• 可旋转键数：
  2
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  177
• 氢给体数：
  2
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  nitrilotriacetatochromium(III) (H2O)2 complex 、 3-hydroxy-4-[(E)-(1-hydroxynaphthalen-2-yl)diazenyl]-7-nitronaphthalene-1-sulfonate 以 水 为溶剂， 生成
  参考文献：
  名称：

  Substitution and protonation reactions of nitrilotriacetatochromium(III) ions

  摘要：

  The reaction of NH4[Cr(NTA)(H2O)2] (NTA = nitrilotriacetic acid) with H+ has been studied at different temperatures and a rate constant of 1.27(3) x 10(-2) S-1 was obtained at 25.1-degrees-C. It is proposed that the reaction involves the formation of an ion pair, followed by the protonation of one of the carboxylate groups of the NTA ligand bonded to the central metal ion. This results in the formation of the [Cr(eta3-NTA)(H2O)3]+ complex. The substitution reactions between [Cr(NTA)(H2O)2]/[Cr(NTA)(OH)(H2O)]- and different ligands (NCS- and EBT-:EBT- = Eriochrome Black T) were also studied. The second-order rate constant for the reaction of NCS- with the [Cr(NTA)(H2O)2] complex at 35.0-degrees-C was 9.1(1) x 10(-3) M-1 s-1 and that for the reaction of EBT- with the metal complex at 30.0-degrees-C was 9.5(6) x 10(-2) M-1 s-1. The increase in substitution rate for the reaction between [Cr(NTA)(H2O)2] and EBT- is attributed to the chelation of the EBT- ligand during this reaction.

  DOI：

  10.1016/s0277-5387(00)83031-4

文献信息

• Hardness measurement method, and fouling prevention method for hardness-measuring device
  申请人：KURITA WATER INDUSTRIES LTD.

  公开号：US10718746B2

  公开（公告）日：2020-07-21

  A water hardness-measuring method and a fouling prevention method for hardness-measuring device include adding a colorant containing Eriochrome Black T and/or Calmagite and a sulfate ester-type anionic surfactant having a bonding unit derived from a sulfate ester including an alkyl group having 8 to 18 carbon atoms that may have one or more substituent in its chemical formula to a sample water.

  用于硬度测量装置的水硬度测量方法和防污方法包括向样品水中添加含有绮丽彩黑 T 和/或钙钛矿的着色剂和硫酸酯类阴离子表面活性剂，硫酸酯类阴离子表面活性剂的键合单元来自硫酸酯，硫酸酯包括具有 8 至 18 个碳原子的烷基，其化学式中可能具有一个或多个取代基。
• HARDNESS-MEASURING COMPOSITION, HARDNESS-MEASURING REAGENT KIT, HARDNESS MEASUREMENT METHOD, AND FOULING PREVENTION METHOD FOR HARDNESS-MEASURING DEVICE
  申请人：KURITA WATER INDUSTRIES LTD.

  公开号：US20160377586A1

  公开（公告）日：2016-12-29

  Provided is a hardness-measuring composition that is used for prevention of measurement error of the measurement unit of a water hardness-measuring device by deposition of the staining components contained in sample water. The hardness-measuring composition comprises a colorant containing Eriochrome Black T and/or Calmagite and a sulfate ester-type anionic surfactant.