3',3'',5',5''-Tetrabromophenolphthalein ethyl ester potassium salt (TBPE)
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science Other reagents with same CAS 62637-91-6
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description Product Description
TBPE is primarily used as a reagent in analytical chemistry for the spectrophotometric determination of various substances. It acts as a chromogenic agent, forming colored complexes with specific analytes, which can be measured to quantify their concentration. This makes it valuable in environmental testing, particularly for detecting heavy metals like cadmium and zinc in water samples. Additionally, TBPE is employed in biochemical research to study enzyme activity and interactions, as its color change properties provide a visual indicator of chemical reactions. It also functions as a pH indicator, showing distinct color transitions from yellow at pH 3.0, light green at pH 3.5, blue to blue-green at pH 4.2, and blue to blue-purple at pH 4.9-5.5. Its stability and sensitivity make it a reliable tool in both laboratory and industrial settings for precise analytical measurements.
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| Test Parameter | Specification |
|---|---|
| Appearance | Dark Green to Dark Blue to Very Dark Blue and Dark Purple to Very Dark Purple and Black Solid |
| Infrared Spectrum | Conforms to Structure |
| pH 3.0 (Yellow) | Conforms to requirements |
| pH 3.5 (Light Green) | Conforms to Requirements |
| pH 4.2 (Blue to Blue-Green) | Conforms to Requirements |
| pH 4.9-5.5 (Blue to Blue-Purple) | Conforms to Requirements |
| Methanol (595-601 nm) | 39000 |
| nm | 4000 |
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