Specification
Product Name α-NAPHTHOLBENZENE
Synonyms 4,4'-(a-Hydroxybenzylidene)di-1-naphthol; a,a-Bis
(4-hydroxy-1-naphthyl)benzyl alcohol p-Naphtholbenzein
CAS NO. 145-50-6
Molecular Formula C27H8O2
Formula Weight 374.44
Appearance Red-Brown flakes/Powder
Structure
   
Tests    Limits
Specific Extinction (1%/1cm)

- 350 minimum

Maximum of Absorption
(in 0.01M NaOH)

- 644.0 - 652.0 nm

Visual Transition Interval:

- From pH 8.2 (orange)
To pH 10.0 (blue)

Chloride (Cl) - 5000 ppm maximum
   
   
REVISED: 1-1-2012  
 
 
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