Description
Chrome Azurol S (C.I. 43825) is an extra pure metal indicator dye for analytical chemistry. It is registered under CAS number 1667-99-8, carries the empirical formula C₂₃H₁₃Cl₂Na₃O₉S, and has a molar mass of 605,29 g/mol. Classified among analytical chemicals used as metal indicators, this Colour Index 43825 reagent supports laboratory procedures that rely on a defined chrome azurol S grade for metal-ion indication and related photometric or complexometric work. The product is Extra pure quality and complete identity data help laboratories document reagent selection with confidence. Offered by manufacturer Carl ROTH, Chrome Azurol S arrives ready for integration into indicator sets where C.I. 43825 specification, molar mass, and compact glass packaging are essential for consistent laboratory practice.
This article is part of Reference substances & reagents (other), in Analytical standards & reference materials.
Key features
- Appearance: brown to black powder
- Maximum absorption: 424-436 nm
- Loss on drying (105 °C): ≤10 %
- CAS number: 1667-99-8
- Pack sizes: 1 g, 10 g, 25 g
- Empirical formula: C₂₃H₁₃Cl₂Na₃O₉S
- Molar mass: 605,29 g/mol
- Grade: extra pure
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
Warning
Hazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about Chrome Azurol S (C.I. 43825), extra pure, 1 g, glass
What is this article?
Chrome Azurol S (C.I. 43825), extra pure, 1 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.
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