1-NAPHTHOLBENZEIN Indicator grade

Used as an indicator 0.1g in 100 ml 2-propanol.
a-Naphtholbenzein; 4,4'-(a-Hydroxybenzylidene)di-1-naphthol; p-naphtholbenzein

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Article No.
04765
Grade
Indicator grade
Purity
CAS No.
145-50-6
Molecular Formula
C27H18O2
Molecular Weight
374.44
H.S. Code
2914.5000
Shelf Life
60 Months
MSDS
 

 

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

Packings

  • 1GBA000015

    5 g (00005)

  • 1GBA000060

    25 g (00025)

 

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 and Hazard Symbols

Exclamation Mark
Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P305 + P351 + P338
Revision Date : 26-Oct-2020
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