2-[(3,5-diiodo-4-oxocyclohexa-2,5-dien-1-ylidene)(4-hydroxy-3,5-diiodophenyl)methyl]benzoic acid
3',3'',5',5''-tetraiodophenolphthalein
CAS: 386-17-4
Molecular Formula: C20H10I4O4
2-[(3,5-diiodo-4-oxocyclohexa-2,5-dien-1-ylidene)(4-hydroxy-3,5-diiodophenyl)methyl]benzoic acid - Names and Identifiers
| Name | 3',3'',5',5''-tetraiodophenolphthalein |
| Synonyms | 3,3,5,5-Tetraiodophenolphthaleine 3',3'',5',5''-tetraiodo-phenolphthalei 3',3'',5',5''-tetraiodophenolphthalein IodopheneIodophthaleinTetraiodophthalein 3,3-bis(4-hydroxy-3,5-diiodophenyl)phthalide 3',3'',5',5''-TETRAIODOPHENOLPHTHALEIN, INDICATOR GRADE 3,3-bis(4-hydroxy-3,5-diiodophenyl)-1(3h)-isobenzofuranon 3,3-Bis(4-hydroxy-3,5-diiodophenyl)-1(3H)-isobenzofuranone 3,3-Bis(4-hydroxy-3,5-diiodophenyl)-2-benzofuran-1(3H)-one 3,3-Bis(4-hydroxy-3,5-diiodophenyl)isobenzofuran-1(3H)-one 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-3,5-diiodophenyl)- 2-[(3,5-diiodo-4-oxocyclohexa-2,5-dien-1-ylidene)(4-hydroxy-3,5-diiodophenyl)methyl]benzoic acid |
| CAS | 386-17-4 |
| EINECS | 206-857-9 |
| InChI | InChI=1/C20H10I4O4/c21-13-5-9(6-14(22)18(13)25)17(10-7-15(23)19(26)16(24)8-10)11-3-1-2-4-12(11)20(27)28/h1-8,25H,(H,27,28) |
2-[(3,5-diiodo-4-oxocyclohexa-2,5-dien-1-ylidene)(4-hydroxy-3,5-diiodophenyl)methyl]benzoic acid - Physico-chemical Properties
| Molecular Formula | C20H10I4O4 |
| Molar Mass | 821.91 |
| Density | 2.0201 |
| Melting Point | 268°C (dec.)(lit.) |
| Boling Point | 607.5±55.0 °C(Predicted) |
| Flash Point | 351.8°C |
| Vapor Presure | 3.23E-18mmHg at 25°C |
| Merck | 14,5038 |
| pKa | 6.37±0.40(Predicted) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.874 |
| MDL | MFCD00001614 |
2-[(3,5-diiodo-4-oxocyclohexa-2,5-dien-1-ylidene)(4-hydroxy-3,5-diiodophenyl)methyl]benzoic acid - Risk and Safety
| WGK Germany | 2 |
| RTECS | SM8397000 |
2-[(3,5-diiodo-4-oxocyclohexa-2,5-dien-1-ylidene)(4-hydroxy-3,5-diiodophenyl)methyl]benzoic acid - Introduction
3 ',3 ", 5',5"-tetraiodophenolphthalein is an organic compound with the chemical formula C20H10I4O5. It is a solid with the appearance of dark red to brown crystals.
3 ',3 '',5',5''-tetraiodophenolphthalein appears red under acidic conditions and becomes colorless under alkaline conditions. This property makes it frequently used as a pH indicator, especially in acid-base titration. When the pH of the solution changes, its color will change significantly.
In the laboratory, 3 ',3 '',5',5''-tetraiodophenolphthalein can be used to determine the concentration of acidity or alkalinity, and can also be used to determine the presence of metal ions. In addition, it can also be used to monitor pH changes in biological reactions.
The method for preparing 3 ',3 ", 5',5"-tetraiodophenolphthalein is usually through the iodination reaction of phenolphthalein. First, phenolphthalein is reacted with iodine to form iodine-substituted phenolphthalein, which is then subjected to further iodination to obtain 3 ',3 ", 5',5"-tetraiodophenolphthalein. The preparation process requires careful handling to ensure safety measures to avoid contact with skin and inhalation of dust.
In terms of safety, 3 ',3',5 ',5'-tetraiodophenolphthalein is a toxic chemical. Its dust and solution can cause irritation and damage to the skin, eyes and respiratory system. Appropriate chemical handling measures must be taken during use and handling, including wearing protective gloves, goggles and protective masks. Avoid contact with oxidizing agents and strong bases, and do not swallow or inhale dust. After use, waste should be properly disposed of and local waste disposal regulations observed.
3 ',3 '',5',5''-tetraiodophenolphthalein appears red under acidic conditions and becomes colorless under alkaline conditions. This property makes it frequently used as a pH indicator, especially in acid-base titration. When the pH of the solution changes, its color will change significantly.
In the laboratory, 3 ',3 '',5',5''-tetraiodophenolphthalein can be used to determine the concentration of acidity or alkalinity, and can also be used to determine the presence of metal ions. In addition, it can also be used to monitor pH changes in biological reactions.
The method for preparing 3 ',3 ", 5',5"-tetraiodophenolphthalein is usually through the iodination reaction of phenolphthalein. First, phenolphthalein is reacted with iodine to form iodine-substituted phenolphthalein, which is then subjected to further iodination to obtain 3 ',3 ", 5',5"-tetraiodophenolphthalein. The preparation process requires careful handling to ensure safety measures to avoid contact with skin and inhalation of dust.
In terms of safety, 3 ',3',5 ',5'-tetraiodophenolphthalein is a toxic chemical. Its dust and solution can cause irritation and damage to the skin, eyes and respiratory system. Appropriate chemical handling measures must be taken during use and handling, including wearing protective gloves, goggles and protective masks. Avoid contact with oxidizing agents and strong bases, and do not swallow or inhale dust. After use, waste should be properly disposed of and local waste disposal regulations observed.
Last Update：2024-04-10 22:29:15
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