Description
Eriochrome black T indicator solution is a ready-to-use reagent at 0,1 % in denatured ethanol, widely applied in water-hardness determination and complexometric titration. The indicator corresponds to CAS number 1787-61-7, EG number 217-250-3 and empirical formula C₂₀H₁₂N₃NaO₇S, with a molar mass of 461,38 g/mol. Reported physical data include a density of 0,808 g/cm³, flash point of 12 °C and boiling point of 78 °C. Packaged as 100 ml in glass, the solution from manufacturer Carl ROTH supports reproducible endpoints in EDTA-type titrations and related metal-ion analyses without on-site dye preparation. It fits analytical workflows focused on determination of physical and chemical water parameters as well as general indicator use in teaching and quality-control laboratories. Handle as a flammable ethanolic preparation and consult the safety data sheet for storage, labelling and personal-protection requirements during routine laboratory titration work.
This article is part of Indicators & indicator solutions, in Analytical standards & reference materials.
Key features
- CAS number: 1787-61-7
- Pack size: 100 ml glass
- EG nr.: 217-250-3
- Empirical formula: C₂₀H₁₂N₃NaO₇S
- Molar mass: 461,38 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
DangerHazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about Eriochrome black T indicator solution, 0,1 % in ethanol denatured, 100 ml, glass
What is this article?
Eriochrome black T indicator solution, 0,1 % in ethanol denatured, 100 ml, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Indicators & indicator solutions, inside Analytical standards & reference materials, in Lab chemicals.
An indicator solution changes colour at a stated point, usually a pH interval or a redox potential, so a titration endpoint can be seen. The solvent and the concentration decide how sharp the change is. A solid indicator dye and a ready solution are different articles.
A reference material is the article against which another result is compared. Its value is stated, and the uncertainty of that value is part of the product. An ICP or ion standard is a solution of known concentration. A volumetric standard is for titration. A chromatography standard is the peak you match. The grade names, including pharmacopoeia and ASTM, say which impurities were limited. Identity is checked on PubChem. Names follow IUPAC. Medicinal grades follow the European Pharmacopoeia and USP.
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The category is Analytical standards & reference materials. The sub-category is Indicators & indicator solutions. The catalogue is Lab chemicals.
Shelves beside this one are ICP, AAS & ion standards, Chromatography standards (GC, HPLC, pesticides), Reference substances & reagents (other), Volumetric standard solutions (titration), Reagents for analysis (Ph. Eur., ASTM, DIN) and Spectroscopy & physical property standards.
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