1-NAPHTHOLBENZEIN

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

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

Certificate of Analysis (COAs)

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

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

Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P305 + P351 + P338

Revision Date : 26-Oct-2020