Description
Arsenazo III is a metal-indicator reagent supplied at min. 85 %, p.a., identified by CAS number 1668-00-4 and empirical formula C₂₂H₁₈As₂N₄O₁₄S₂. With a molar mass of 776,37 g/mol, it is established for sensitive spectrophotometric determination of rare-earth elements, uranium, thorium, and other metal ions. The bis-azo dye forms intensely coloured complexes that enable low-level detection in analytical and environmental laboratories. a. material is practical for indicator stock solutions and method validation. Available from manufacturer Carl ROTH within the metal-indicators range, it supports complexometric and photometric workflows where a defined assay is required. EG nr. 216-788-6 accompanies the specification. Analysts rely on Arsenazo III for reproducible colour development and selective metal binding in research, quality control, and specialised inorganic analysis.
This article is part of Analytical grade solvents (p.a.), in Solvents.
Key features
- Assay (HPLC): ≥85,0 %
- Sulphated ash: ≤0,2 %
- Loss on drying (120 °C): ≤8,0 %
- Specific Extinction E (1%/1cm): 300,0-450,0
- Absorption max. (in H2O): 535,0-543,0 nm
- Absorption max. (in buffer pH 10): 571,0-576,0 nm
- Lead (Pb): ≤0,001 %
- Cadmium (Cd): ≤0,005 %
- Calcium (Ca): ≤0,01 %
- Chromium (Cr): ≤0,005 %
- CAS number: 1668-00-4
- Pack sizes: 1 g, 5 g
- EG nr.: 216-788-6
- Purity: min. 85 %, p.a.
- Empirical formula: C₂₂H₁₈As₂N₄O₁₄S₂
- Molar mass: 776,37 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 Arsenazo III, min. 85 %, p.a., 1 g, glass
What is this article?
Arsenazo III, min. 85 %, p.a., 1 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Analytical grade solvents (p.a.), inside Solvents, in Lab chemicals.
An analytical-grade solvent, often marked p.a., has impurity limits tight enough for classical analysis and for preparing reagents. It is not automatically low enough in UV absorbance for HPLC, and it is not dry enough for a water-sensitive reaction. The grade is the purchase.
A solvent dissolves. The grade says which impurities are low enough for the method. Analytical grade is the ordinary pure solvent. HPLC and LC-MS grades limit the absorbance and the ions that would become peaks or background. A dry solvent has had water removed. A deuterated solvent is for NMR, where the hydrogen signal would otherwise drown the sample. Technical grade is for cleaning and for synthesis that does not need a chromatogram. Identity is on PubChem. Names follow IUPAC. Hazards follow ECHA, the CLP Regulation and REACH.
Which category should I open next?
The category is Solvents. The sub-category is Analytical grade solvents (p.a.). The catalogue is Lab chemicals.
Shelves beside this one are HPLC & LC-MS grade solvents, Dry & deuterated solvents (NMR, synthesis), Technical & synthesis grade solvents and Green & alternative solvents.
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