Phenolphthalein
Ph Eur.,BP,98-101%
- Product Code: 51541
Alias:
Phenolphthalein; Phenol branphthalein, phenol bran, 3,3-bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone
CAS:
77-09-8
| Molecular Weight: | 318.32 g./mol | Molecular Formula: | C₂₀H₁₄O₄ |
|---|---|---|---|
| EC Number: | 201-004-7 | MDL Number: | MFCD00005913 |
| Melting Point: | 258-263 °C | Boiling Point: | |
| Density: | 1.299 | Storage Condition: | room temperature |
Product Description:
Phenolphthalein is widely used as a pH indicator in acid-base titrations. In acidic or neutral solutions, it remains colorless, but it turns a distinct pink color in basic solutions, typically at a pH around 8.3 to 10. This property makes it a valuable tool in chemistry labs for determining the endpoint of titrations involving strong acids and bases. Beyond titrations, it is also employed in educational settings to demonstrate pH changes visually. Additionally, phenolphthalein has been used in medical applications, particularly as a laxative, though its use for this purpose has declined due to safety concerns. In forensic science, it is utilized in the Kastle-Meyer test to detect the presence of blood, where it reacts with hemoglobin to produce a pink color. Its versatility in various fields underscores its importance as a chemical reagent.
Product Specification:
| Test | Specification |
|---|---|
| ASSAY | 98 101% |
| HEAVY METALSAS PB | 0 0.001% |
| LOSS ON DRYING | 0 0.5% |
| Melting point | 260 263? |
| INFRARED SPECTRUM | Conforms to Structure |
Sizes / Availability / Pricing:
| Size (g) | Availability | Price | Quantity |
|---|---|---|---|
| 100.000 | 10-20 days | $30.73 |
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| 500.000 | 10-20 days | $76.83 |
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| 2500.000 | 10-20 days | $294.86 |
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Phenolphthalein
Phenolphthalein is widely used as a pH indicator in acid-base titrations. In acidic or neutral solutions, it remains colorless, but it turns a distinct pink color in basic solutions, typically at a pH around 8.3 to 10. This property makes it a valuable tool in chemistry labs for determining the endpoint of titrations involving strong acids and bases. Beyond titrations, it is also employed in educational settings to demonstrate pH changes visually. Additionally, phenolphthalein has been used in medical applications, particularly as a laxative, though its use for this purpose has declined due to safety concerns. In forensic science, it is utilized in the Kastle-Meyer test to detect the presence of blood, where it reacts with hemoglobin to produce a pink color. Its versatility in various fields underscores its importance as a chemical reagent.
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