1-NAPHTHOLPHTHALEIN (PH INDICATOR)
| Product Code | B-01782A | BRAND | Bio-Chem |
|---|---|---|---|
| Grade | Indicator | CAS No | 596-01-0 |
| Molecular Formula | C28H18O4 | Molecular Weight | 418.45 |
| H.S.Code | 3204.90000 | Shelf Life | 60 Months |
| Purity | 98 % |
Physical Properties
| Physical state at 20 °C | Solid | Colour | Black powder |
|---|---|---|---|
| Odour | Characteristic odour | Vapour density | 14.44 |
| Melting point/ Freezing point [°C] | 238 - 240 °C | Solubility in water [% weight] | Insoluble in water |
| Partition coefficient Log Pow octanol / water at 20°C | 5.41 |
Packaging
Specification
| Appearance | Light Pink to Beige to Red-Brown Powder |
| Loss on drying (at 105°C) | Max 5% |
| pH transition range (7.1 – 8.3) | Brownish pink to blue |
| Absorption maxima (Buffer pH 7.1) | 471 – 485 nm |
| Absorption maxima (buffer pH 8.3) | 649 – 654 nm |
Safety Information and Hazard Symbols
Symbol: GHS07 ,GHS08
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P305 + P351 + P338