O-CRESOLPHTHALEIN (PH INDICATOR)
Specification
| Appearance | Light brown powder |
| pH 8.2-9.8 | Colourless to violet red |
| Absorption maxima at pH 11.3 | 565 – 569 nm |
| Specific absorptivity A1%/1cm (at lmax) | Min 1500 |
| Insoluble matter in ethanol | Passes test |
| Loss on dryig (at 135°C) | Max 0.5% |
| Sulphated ash | Max 0.5% |
Safety Information and Hazard Symbols
Symbol: GHS06
Signal Word: Danger