3;5-PYROCATECHOLDISULFONIC ACID DISODIUM SALT MONOHYDRATE (TIRON) METAL INDICATOR

Code: 1019220100 D2-231

Analysis Note

Identity (UV/VIS-Spectrum): passes testAbsorption maximum λmax. (buffer pH 2.5): 290 - 291 nmSpec. Absorptivity A 1%/1cm (λmax; ...


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Analysis Note

Identity (UV/VIS-Spectrum): passes testAbsorption maximum λmax. (buffer pH 2.5): 290 - 291 nmSpec. Absorptivity A 1%/1cm (λmax; 0.05 g/l; buffer pH 2.5; calculated on anhydrous substance): 100 - 125Water (according to Karl Fischer): 4.5 - 6.5 %Suitability as indicator (for metal titration): passes test

Packaging

100 g in Glass bottle

λmax290-291 nm (buffer pH 2.5)
bulk density465 kg/m3
compositionWater, 4.5-6.5% Karl Fischer
formsolid
InChI keyISWQCIVKKSOKNN-UHFFFAOYSA-L
InChI1S/C6H6O8S2.2Na/c7-4-1-3(15(9,10)11)2-5(6(4)8)16(12,13)14;;/h1-2,7-8H,(H,9,10,11)(H,12,13,14);;/q;2*+1/p-2
mp300 °C
pH5.0 (20 °C, 10 g/L in H2O)
Quality Level200
solubility1350 g/L
storage temp.15-25°C
Cas Number149-45-1
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