Description
Eriochrom blue black R (C.I. 15705) is a metal indicator intended for complexometric analysis in analytical laboratories. The dye is characterised by CAS number 2538-85-4, EG number 219-810-2, the empirical formula C₂₀H₁₃N₂O₅SNa and a molar mass of 416,39 g/mol, enabling precise documentation in standard operating procedures and reagent logs. Its classification among analytical chemicals, indicators and metal indicators underlines its role in classical volumetric methods. Available from manufacturer Carl ROTH, the product supports routine complexometry where a sodium-salt azo dye of this Colour Index designation is specified. The glass container helps protect the solid between openings and facilitates accurate dispensing of small laboratory portions. Analysts performing water hardness tests, metal-ion determinations or related complexometric assays can incorporate this indicator into established titration schemes with consistent colour-change behaviour at the endpoint.
This article is part of Reference substances & reagents (other), in Analytical standards & reference materials.
Key features
- Appearance: dark brown to black powder
- Solubility (water/ethanol): complies
- CAS number: 2538-85-4
- Pack sizes: 5 g, 25 g, 100 g
- EG nr.: 219-810-2
- Empirical formula: C₂₀H₁₃N₂O₅SNa
- Molar mass: 416,39 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
Warning
Hazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about Eriochrom blue black R (C.I. 15705), for complexometry, 5 g, glass
What is this article?
Eriochrom blue black R (C.I. 15705), for complexometry, 5 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Reference substances & reagents (other), inside Analytical standards & reference materials, in Lab chemicals.
A reference substance has a stated identity and a stated content, used to check a method or to standardise a titration. It is a more tightly specified article than a reagent grade bottle of the same name. The lot's certificate is part of the product.
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.
Which category should I open next?
The category is Analytical standards & reference materials. The sub-category is Reference substances & reagents (other). The catalogue is Lab chemicals.
Shelves beside this one are ICP, AAS & ion standards, Chromatography standards (GC, HPLC, pesticides), Volumetric standard solutions (titration), Reagents for analysis (Ph. Eur., ASTM, DIN), Spectroscopy & physical property standards and Indicators & indicator solutions.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.