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Alpha Naphtolbenzein CAS 145-50-6:

Various used chemical compound! Now made in EU - Excellent product specifications and purity! 

Purity: 70%+ 

Appearance:                           Red to very dark powder

Identification:                          1H-NMR

Solubility method:                   0.01g in 10ml ethanol

Solubility color:                       Red to very dark red

pH-Transition                          pH 8.2-10.0

Melting point:                          230 - 235 °C