Specifications
- Purity
- ≥95% (NMR)
- Identity
- 1H-NMR
- Appearance
- White to light yellow powder
Properties
- Melting Point
- 219-221 °C(lit.)
- Solvents
- ethanol, water (insoluble)
Available from stock
o-Cresolphthalein
- SKU
- C0242
Category: Non Fluorescent Detection & Chromogene Detection
- Synonyms
- Ortho-Cresolphthalein , Cresolphthalein , 3',3''-Dimethylphenolphthalein , BRN 0310554 , 3,3-Bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1(3H)-one
- 596-27-0
- CAS-Number
- C22H18O4
- Molecular Formula
- 346.38
- Molecular Weight
- Shipping
- AMBIENT
- Use / Stability
- Stable for at least 2 years after receipt when stored at +4°C.
- Handling Advice
- Protect from light and moisture.
- Long Term Storage
- +4°C
- Short Term Storage
- RT
- Transportation
- Not dangerous goods
- Description
- o-Cresolphthalein is a reversible pH indicator that is colorless at pH 8.2 and red at pH 9.8. The kinetics of the reverse pathway (red-purple to colorless) is slow, thereby making it an appropriate molecule to check flow patterns in ducts with corrugated walls. It is also used for the colorimetric determination of calcium content via the o-cresolphthalein complexone method. Binding of calcium to o-cresolphthalein, in the presence of alkaline conditions (pH 10-12), results in the formation of a red complex with an absorbance at 570-575nm. Spectral data: UV-Visible (λmax) 566 nm, 381 nm (2nd). This compound is applied in sensors, display device, imaging materials, authentication system for secure documents, lithium cells, inks, markers, toners, paints, adhesives, food storage, urine analysis test strips, drugs and blood analysis.
- References
- (1) L.G. Morin, Am. J. Clin. Pathol. 61, 114 (1974) , (2) W. Moorehead, Clin. Chem. 20, 1458 (1974) , (3) K. Hosoi, et al., J. Biochem. 78, 1331 (1975) , (4) R.W. Sabnis, Handbook of Acid-Base Indicators (2008)
- InChi Key
- CPBJMKMKNCRKQB-UHFFFAOYSA-N
- Smiles
- O=C1C2=CC=CC=C2C(C3=CC=C(O)C(C)=C3)(C4=CC(C)=C(O)C=C4)O1
o-Cresolphthalein is a reversible pH indicator that is colorless at pH 8.2 and red at pH 9.8. The kinetics of the reverse pathway (red-purple to colorless) is slow, thereby making it an appropriate molecule to check flow patterns in ducts with corrugated walls. It is also used for the colorimetric determination of calcium content via the o-cresolphthalein complexone method. Binding of calcium to o-cresolphthalein, in the presence of alkaline conditions (pH 10-12), results in the formation of a red complex with an absorbance at 570-575nm. Spectral data: UV-Visible (λmax) 566 nm, 381 nm (2nd). This compound is applied in sensors, display device, imaging materials, authentication system for secure documents, lithium cells, inks, markers, toners, paints, adhesives, food storage, urine analysis test strips, drugs and blood analysis.
Additional information
| Synonyms | Ortho-Cresolphthalein, Cresolphthalein, 3',3''-Dimethylphenolphthalein, BRN 0310554, 3,3-Bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1(3H)-one |
|---|---|
| Purity | ≥95% (NMR) |
| Appearance | White to light yellow powder |
| CAS-Number | 596-27-0 |
| Molecular Formula | C22H18O4 |
| Molecular Weight | 346.38 |
| Identity | 1H-NMR |
| Solvents | ethanol, water (insoluble) |
| Melting Point | 219-221 °C(lit.) |
| Smiles | O=C1C2=CC=CC=C2C(C3=CC=C(O)C(C)=C3)(C4=CC(C)=C(O)C=C4)O1 |
| InChi Key | CPBJMKMKNCRKQB-UHFFFAOYSA-N |
| Shipping | AMBIENT |
| Short Term Storage | RT |
| Long Term Storage | +4°C |
| Handling Advice | Protect from light and moisture. |
| Use / Stability | Stable for at least 2 years after receipt when stored at +4°C. |
| Transportation | Not dangerous goods |
| References | (1) L.G. Morin, Am. J. Clin. Pathol. 61, 114 (1974), (2) W. Moorehead, Clin. Chem. 20, 1458 (1974), (3) K. Hosoi, et al., J. Biochem. 78, 1331 (1975), (4) R.W. Sabnis, Handbook of Acid-Base Indicators (2008) |
| Quantity | 10 g, Bulk |
