1-NAPHTHOLPHTHALEIN

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1-NAPHTHOLPHTHALEIN
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Stains Indicator Reagents-69

1-NAPHTHOLPHTHALEIN

SKU: RXSOL-69-5960-100

1-NAPHTHOLPHTHALEIN  excellent quality manufacturer, exporter and supplier. 1-Naphtholphthalein (C28H18O4) is a pH indicator with a visual transition from colorless/reddish to greenish blue at pH 7.3 – 8.7. 
 

Application

As indicator in 0.1% or 0.04% solution in alcohol. pH 7.3 colorless to reddish; 8.7 greenish to blue. Particularly adapted for weak acids in strong alcoholic solution.

Technical Specification

C.A.S. No. 596-01-0,
Physical State : Black Powder
Insoluble in water
M.F. C28H18O4
M.W. 418.45gm/mole

Specifications:

Solubility 0.1 % (95% EtOH) Almost Clear solution
Absorption maximum (in 0.1N NaOH) ?max 650-654nm
Absorptivity 1%/1cm (in 0.1N NaOH) at ?max >650
Loss On Drying (110°C) 3%
Melting Point Range 238-240 °C(lit.)
Pack Size / Specification:
1 Gram, 5 Gram, 50 Gram bottle available on factory sale price.
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