1.03164

Eriochrome cyanine R (C.I. 43820)

metal indicator, for analysis, reagent for aluminum

• Synonym(s): Eriochrome cyanine R (C.I. 43820)
• Empirical Formula (Hill Notation): C₂₃H₁₅Na₃O₉S
• CAS Number: 3564-18-9
• Molecular Weight: 536.39
• UNSPSC Code: 12352107
• EC Index Number: 222-641-7
• NACRES: NB.21

Properties

• product name: Eriochrome cyanine R (C.I. 43820), for analysis (reagent for aluminium)
• Quality Level: 200
• potency: >2000 mg/kg LD₅₀, oral (Rat)
• loss: ≤10% loss on drying, 110°C
• pH: 9.1 (24 °C, 10 g/L in H₂O)
• solubility: 420 g/L
• bulk density: 590 kg/m³
• λmax: 434-440 nm (buffer pH 7.0)
• storage temp.: 2-30°C
• InChI: 1S/C23H18O9S.Na/c1-11-7-13(9-15(19(11)24)21(26)27)23(14-8-12(2)20(25)16(10-14)22(28)29)17-5-3-4-6-18(17)33(30,31)32-23;/h3-10,24-25H,1-2H3,(H,26,27)(H,28,29);/q;+1
• InChI key: HJEGHSWGWSAZBS-UHFFFAOYSA-N

Description

Application

• Determination of Food Oxalates Using Silica-Titania Xerogel Modified with Eriochrome Cyanine R.: This research explores a novel method to determine oxalate concentrations in food using Eriochrome Cyanine R, highlighting the dye′s potential in enhancing analytical sensitivity and specificity (Morosanova et al., 2018).
• Development of a Dispersive Liquid-Liquid Microextraction Method Combined with UV-Visible Spectrophotometry for Determination of Trace Aluminum(III) in Water, Wastewater, Food, Biological, and Pharmaceutical Samples.: This study demonstrates a new method utilizing Eriochrome Cyanine R for tracing aluminum levels across various samples, showcasing its utility in environmental and health-related chemical analyses (Birgani et al., 2017).
• Direct, sensitive determination of trace amounts of dissolved ferric iron in natural water by light absorption ratio variation spectrometry.: Though not directly mentioning Eriochrome Cyanine R, this article focuses on related spectrometric techniques that can be adapted for dyes like Eriochrome Cyanine R to detect iron in natural water sources (Gao et al., 2005).
• Determination of vanadium by solid-phase spectrophotometry after its preconcentration as an Eriochrome Cyanine R complex on a dextran-type exchanger.: This research introduces a method for vanadium determination using Eriochrome Cyanine R, underlining the dye′s role in the preconcentration and quantification of vanadium in complex matrices (Boudra et al., 1995).

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (buffer pH 7.0): 434 - 440 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.02 g/l; buffer pH 7.0; calc. on dried substance): 130 - 230
Loss on drying (110 °C): ≤ 10 %

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable