1.06278
Alizarin red S mono sodiumsalt (C.I. 58005)
visual transition interval 4.3-6.3, yellow to pink, visual transition interval 9.4-12.0, brown-orange to violet
loss
≤10% loss on drying, 110°C
Quality Level
visual transition interval
4.3-6.3, yellow to pink
9.4-12.0, brown-orange to violet
Amax
418-424 nm (buffer pH 4.3
buffer pH 4.3
1 buffer pH 4.3)
444-450 nm (buffer pH 9.4)
510-517 nm (buffer pH 6.3)
554-558 nm (buffer pH 12.0)
storage temp.
2-30°C
InChI
1S/C14H8O7S.Na/c15-11-6-3-1-2-4-7(6)12(16)10-8(11)5-9(22(19,20)21)13(17)14(10)18;/h1-5,17-18H,(H,19,20,21);/q;+1/p-1
InChI key
HFVAFDPGUJEFBQ-UHFFFAOYSA-M
Related Categories
General description
Analysis Note
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 %
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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