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1-Naphtholbenzein (pH Indicator) | 01781 Chemnovo Synthesis Pvt. Ltd. - Driven by Chemistry, Defined by Precision
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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

CAS : 145-50-6

HS Code : 2914.50000

Molecular Formula : C27H18O2

Molecular Weight : 374.44

Product Datasheet

Shelf Life : 60 Months

COA
No packaging image
Molecular Formula

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

Specifications

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