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1-Naphtholbenzein (pH Indicator) | 01781 Pallav Chemicals | MSDs COA

Home > Pallav Chemicals > pH Indicator (Solid) > 1-Naphtholbenzein (pH Indicator)

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

Product Code.
 01781
Grade
 Indicator grade
Purity
CAS No.
 145-50-6
Molecular Formula
 C27H18O2
Molecular Weight
 374.44
H.S.Code
 2914.50000
Shelf Life
 60 Months
COAs

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

Packaging

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