Product Code: 1.2090
Neutronco
Thymol blue
| Formula | C27H30O5S |
| Molar mass | 466.60 g/mol |
| CAS number | 76-61-9 |
| HS code | 29349990 |
| EC number | 200-973-3 |
| Storage | +15 °C to +30 °C |
| SDS | Available |
| Description | Conforms | ||
| Identification | Conforms | ||
| Loss on drying ( 110.0 °C ) | ≤ | 3 | % |
| Appearance of solution | Conforms | ||
| Transition Range 1 | Conforms | ||
| Transition Range 2 | Conforms | ||
| Sensitivity test | Conforms |
Thymol blue (thymolsulfonephthalein) is a brownish-green or reddish-brown crystalline powder that is used as a pH indicator. It is insoluble in water but soluble in alcohol and dilute alkali solutions.
It transitions from red to yellow at pH 1.2–2.8 and from yellow to blue at pH 8.0–9.6. It is usually a component of Universal indicator.
At wavelength (378 – 382) nm, extinction coefficient > 8000 and at wavelength (298 – 302) nm, the extinction coefficient > 12000.
🧪 Application
Thymol Blue has been used for the in situ spectrophotometric pH measurement.
⚠️ Safety
It may cause irritation. Its toxicological properties have not been fully investigated. Harmful if swallowed, Acute Toxicity. Only Hazardous when percent values are above 10%.
