Home Chemnovo pH Indicator (Solid) 1-Naphtholbenzein (pH Indicator)
01781
1-Naphtholbenzein (pH Indicator)
Used as an indicator 0.1g in 100 ml 2-propanol. a-Naphtholbenzein; 4,4'-(a-Hydroxybenzylidene)di-1-naphthol; p-naphtholbenzein
Physical Properties
Physical state at 20 °C
Solid |
Colour
Dark reddish black |
Odour
Odorless |
Melting point/ Freezing point [°C]
185°C |
Vapour density
12.9 |
Solubility in water [% weight]
Insoluble in water |
Specification
Appearance
Dark red to red-brown to brown-black to orange-brown powder |
Visual transition interval
Yellow to greenpH 8.2 (yellow to orange) to pH 10 (green-blue) |
Absorption maxima in acetic perchloric acid 0.1 mol/L
622 - 626 nm |
Safety Information and Hazard Symbols
Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P305 + P351 + P338
×
1-Naphtholbenzein (pH Indicator)
| Pack Size | Quantity |
|---|---|
| 2500 ml | 3 |
| 500 ml | 2 |