1,4-DIOXANE FOR ANALYSIS EMSURE 250 ML
Rp 1.347.000
Hotline (061) 6641391
visual transition interval 4.3-6.3, yellow to pink, visual transition interval 9.4-12.0, brown-orange to violet
Synonym(s):
Alizarin red S mono sodiumsalt (C.I. 58005)
Empirical Formula (Hill Notation):
C14H7NaO7S
Identity (UV/VIS-Spectrum): passes test
1st transition range: pH 4.3 - pH 6.3 Lightly yellow - pink
2nd transition range: pH 9.4 - pH 12.0 Brown orange - violet
Absorption maximum λ 1 (buffer pH 4.3): 418 - 424 nm
Absorption maximum λ 2 (buffer pH 6.3): 510 - 517 nm
Absorption maximum λ 3 (buffer pH 9.4): 444 - 450 nm
Absorption maximum λ 4 (buffer pH 12.0): 554 - 558 nm
Spec. Absorptivity A 1%/1cm (λ1max; 0.01 g/l; buffer pH 4.3; calc. on dried substance): 135 - 180
Spec. Absorptivity A 1%/1cm (λ2max; 0.01 g/l; buffer pH 6.3; calc. on dried substance): 145 - 210
Spec. Absorptivity A 1%/1cm (λ3max; 0.01 g/l; buffer pH 9.4; calc. on dried substance): 170 - 230
Spec. Absorptivity A 1%/1cm (λ4max; 0.01 g/l; buffer pH 12.0; calc. on dried substance): 340 - 520
Loss on drying (110 °C): ≤ 10 %
Rp 1.347.000
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