1-NAPHTHOLPHTHALEIN INDICATOR

Code: 1062460005 D2-231

Analysis Note

Identity (UV/VIS-Spectrum): passes testTransition range: pH 7.1 - pH 8.3pinkbrownish - blueAbsorption maximum λ 1 (buffer pH 7.1): 470 - 485 nmAbsorption m...


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Analysis Note

Identity (UV/VIS-Spectrum): passes testTransition range: pH 7.1 - pH 8.3pinkbrownish - blueAbsorption maximum λ 1 (buffer pH 7.1): 470 - 485 nmAbsorption maximum λ 2 (buffer pH 8.3): 649 - 654 nmSpec. Absorptivity A 1%/1cm (λ1max; 0.01 g/l; buffer pH 7.1; calc. on anhydrous substance): 100 - 180Spec. Absorptivity A 1%/1cm (λ2max; 0.01 g/l; buffer pH 8.3; calc. on anhydrous substance): 360 - 520Loss on drying (110 °C): ≤ 5 %

Packaging

5, 100 g in Glass bottle

Amax649-654 nm (buffer pH 8.3), 470-485 nm (buffer pH 7.1)
bulk density350 kg/m3
formsolid
InChI keyHQHBAGKIEAOSNM-UHFFFAOYSA-N
InChI1S/C28H18O4/c29-25-15-13-23(17-7-1-3-9-19(17)25)28(22-12-6-5-11-21(22)27(31)32-28)24-14-16-26(30)20-10-4-2-8-18(20)24/h1-16,29-30H
loss≤5% loss on drying, 110°C
mp253-255 °C
Quality Level200
storage temp.2-30°C
visual transition interval7.1-8.3, pink-brown to blue
Cas Number596-01-0
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