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Key Documents

105945

Sigma-Aldrich

酚酞

ACS reagent

同義詞:

3,3-双(4-羟基苯基)-1(3H)-异苯并呋喃酮

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About This Item

經驗公式(希爾表示法):
C20H14O4
CAS號碼:
分子量::
318.32
顏色索引編號:
764
Beilstein:
284423
EC號碼:
MDL號碼:
分類程式碼代碼:
12171500
PubChem物質ID:
NACRES:
NA.47

等級

ACS reagent

品質等級

形狀

powder

技術

titration: suitable

visual transition interval

8.0-10, colorless to red

mp

261-263 °C (lit.)

溶解度

acetone: soluble

密度

1.27 g/cm3 at 32 °C

λmax

374 nm (2nd)
552 nm

應用

diagnostic assay manufacturing
hematology
histology

儲存溫度

room temp

SMILES 字串

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 密鑰

KJFMBFZCATUALV-UHFFFAOYSA-N

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一般說明

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。

應用

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

生化/生理作用

酚酞在酸性溶液中无色,在碱性溶液中变成粉红色。

原則

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。

象形圖

Health hazardExclamation mark

訊號詞

Danger

危險分類

Carc. 1B - Muta. 2 - Repr. 2 - Skin Irrit. 2

儲存類別代碼

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

Eyeshields, Gloves, type P3 (EN 143) respirator cartridges


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