o-Cresolphthalein
AR, alkali soluble
- Product Code: 126556
Alias:
o-cresolphthalein; 3,3'-Dimethylphenolphthalein, 3,3-bis(4-hydroxy-3-methylphenyl)-1(3H)-isobenzofuranone
CAS:
596-27-0
| Molecular Weight: | 346.38 g./mol | Molecular Formula: | C₂₂H₁₈O₄ |
|---|---|---|---|
| EC Number: | 209-881-8 | MDL Number: | MFCD00005912 |
| Melting Point: | 223-225 °C | Boiling Point: | |
| Density: | Storage Condition: | room temperature |
Product Description:
o-Cresolphthalein is primarily used as a pH indicator in various analytical and laboratory applications. It is commonly employed in titrations to determine the endpoint of acid-base reactions, particularly in the pH range of 8.2 to 9.8, where it transitions from colorless to pink. This makes it useful in biochemical and clinical laboratories for measuring the pH of solutions or monitoring reactions. Additionally, it is utilized in the determination of calcium levels in biological samples, such as blood serum, where it forms a colored complex with calcium ions, enabling spectrophotometric analysis. Its stability and distinct color change make it a reliable tool in quantitative chemical analysis.
Product Specification:
| Test | Specification |
|---|---|
| Ignition Residue (As Sulfate) | 0-0.1 |
| Appearance | White To Tan Powder |
| Infrared Spectrum | Conforms To Structure |
| Solubility (Dilute NaOH) | Clear |
| Vis. Transition Interval | pH 8.2 (Colorless)-pH 9.8 (Red/Purple) |
| λmax | 563.0-568.0 |
Sizes / Availability / Pricing:
| Size (g) | Availability | Price | Quantity |
|---|---|---|---|
| 25.000 | 10-20 days | ฿390.00 |
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| 100.000 | 10-20 days | ฿890.00 |
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| 500.000 | 10-20 days | ฿2,820.00 |
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| 2500.000 | 10-20 days | ฿11,520.00 |
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o-Cresolphthalein
o-Cresolphthalein is primarily used as a pH indicator in various analytical and laboratory applications. It is commonly employed in titrations to determine the endpoint of acid-base reactions, particularly in the pH range of 8.2 to 9.8, where it transitions from colorless to pink. This makes it useful in biochemical and clinical laboratories for measuring the pH of solutions or monitoring reactions. Additionally, it is utilized in the determination of calcium levels in biological samples, such as blood serum, where it forms a colored complex with calcium ions, enabling spectrophotometric analysis. Its stability and distinct color change make it a reliable tool in quantitative chemical analysis.
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