产品介绍
Product Description
General description
酚酞是酸碱滴定反应的指示剂。在pH 8.3-9.8之间，颜色呈无色至紫红色，极强酸溶液中红色，极强碱溶液中无色。
在中性水溶液中为非离子的亲脂性内酯。它在碱性溶液中以亲水性二价阴离子的形式存在。
Application
酚酞常用作生物和医学领域中的指示剂。用途：
- 开发新技术监测真空冷冻干燥过程
- 混凝土碳化深度的测定
- 使用液体弹珠感知环境气体组分
- 醋中总酸含量的测定
- 化学去皮后，土豆中浸入氢氧化钠的检测
- 作为模式有机物，用于检测各种环糊精材料的捕获效率，例如纳米纤维-环糊精
Biochem/physiol Actions
pH改变或水分子结构变化都会导致酚酞结构改变。 在中性水溶液中为非离子的亲脂性内酯，在碱性溶液中为亲水性双阴离子。
酚酞在酸性溶液中无色，在碱性溶液中变成粉红色。
技术参数
Specifications
| grade | ACS reagent |
| Quality Segment | 200 |
| form | powder |
| technique(s) | titration: suitable |
| visual transition interval | 8.0-10, colorless to red |
| mp | 261-263 °C (lit.) |
| solubility | acetone: soluble |
| density | 1.27 g/cm3 at 32 °C |
| λmax | 374 nm (2nd),552 nm |
| web metadata keyword.default | 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone,ACS grade Phenolphthalein for laboratory use,Phenolphthalein 100g for hematology applications,Phenolphthalein 1L bottle for educational laboratories,Phenolphthalein 500g powder for titration,Phenolphthalein for diagnostic assays,Phenolphthalein in aqueous solution for lab use,Phenolphthalein indicator for titration,Phenolphthalein pH indicator for biology,Phenolphthalein reagent for histology applications,Phenolphthalein solution for acid-base titration,Phenolphthalein titration reagent for chemical analysis,Sigma-Aldrich Phenolphthalein 77-09-8,high purity Phenolphthalein for research,laboratory-grade Phenolphthalein |
| application(s) | diagnostic assay manufacturing hematology histology |
| storage temp. | room temp |
| SMILES string | Oc1ccc(cc1)C2(OC(=O)c3ccccc23)c4ccc(O)cc4 |
| InChI | 1S/C20H14O4/c21-15-9-5-13(6-10-15)20(14-7-11-16(22)12-8-14)18-4-2-1-3-17(18)19(23)24-20/h1-12,21-22H |
| InChI key | KJFMBFZCATUALV-UHFFFAOYSA-N |
