1-NAPHTHOLBENZEIN
1-NAPHTHOLBENZEIN Indicator grade
Used as an indicator 0.1g in 100 ml 2-propanol.
Short Name: 1-NAPHTHOLBENZEIN
Synonym: a-Naphtholbenzein; 4,4'-(a-Hydroxybenzylidene)di-1-naphthol; p-naphtholbenzein
Basic Details
Article No.
LG3168
Grade
Indicator grade
Purity
CAS No.
145-50-6
HS Code
2914.5000
Shelf Life
60 Months
Packings Avialable
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
Chemical Specifications
Appearance
Dark red to red-brown to brown-black to orange-brown powder
Visual transition interval
pH 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 & Hazard Symbols
Symbol
GHS07
Signal Word
Warning
Hazardous Statement
H315-H319-H335
Precaution Statement
P261-P305 + P351 + P338