α-NAPHTHOL BENZEIN (pH INDICATOR) (1-NAPHTHOL BENZEIN)*

α-NAPHTHOL BENZEIN (pH INDICATOR) (1-NAPHTHOL BENZEIN) α-NAPHTHOL BENZEIN (pH INDICATOR) (1-NAPHTHOL BENZEIN)
Article No. Grade Purity Cas no. Molecular Formula Molecular Weight H.S. Code Shelf Life
N0140500025 pH Indicator 145-50-6 C27H18O2 374.44 2914.5000
60 Months

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 reddish black powder

pH transition (8.5 - 9.8):

 Yellow to Green

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
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Globally Harmonized System of classification and Labelling of Chemicals (GHS)

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