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SURAT CHEMICAL TAG::
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.
Range7.1(brownish)-8.3(blue/green) Water Solubility Insoluble in water. Soluble in ethanol.
Molar mass: 418.45 g/mol
Appearance: Colorless-reddish to blue-green solid
Chemical formula: C28H18O4
Solubility in water: Insoluble
Solubility in water: InsolubleMolar mass: 418.45 g/mol
Appearance: Colorless-reddish to blue-green solid
Chemical formula: C28H18O4
Solubility in water: Insoluble
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) ?max650-654nm
Absorptivity 1%/1cm (in 0.1N NaOH) at ?max>650
Loss On Drying (110°C)<3%
Melting Point Range238-240 °C(lit.)
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.
pH 7.1 - pH 8.3 pink brownish - blue
Storage of liquid indicator : storage temp. Store below +30°C.solubility Solubility Practically insoluble in water; soluble in ethanol
pH-Indicator-Solid
1NAPHTHOLPHTHALEIN
CASNO-596-01-0
HS CODE : 32049000
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