Description
Thorin is an analytical-grade metal indicator supplied as p.a. material with CAS number 3688-92-4 and empirical formula C₁₆H₁₁AsN₂Na₂O₁₀S₂. The molar mass is 576,30 g/mol, providing a clear basis for solution preparation and stoichiometric work in quantitative analysis. This arsenic-containing azo dye is established for photometric and titrimetric determination of selected metal ions, particularly in classical wet-chemical procedures. Categories for analytical chemicals and metal indicators reflect its intended laboratory role. Thorin from manufacturer Carl ROTH is presented for professional analytical environments that require a defined p.a. indicator grade. EG number 222-993-1 supports substance identification in laboratory documentation systems. Use this reagent when a reliable thorin source is needed for metal-ion indication, teaching of classical analytical methods or development of colorimetric protocols that depend on consistent dye performance and purity.
This article is part of Reference substances & reagents (other), in Analytical standards & reference materials.
Key features
- Appearance: red to reddish brown powder
- Specific Extinction E (1%/1cm): 190-200
- CAS number: 3688-92-4
- Pack sizes: 5 g, 10 g
- EG nr.: 222-993-1
- Empirical formula: C₁₆H₁₁AsN₂Na₂O₁₀S₂
- Molar mass: 576,30 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 Thorin, p.a., 5 g, glass
What is this article?
Thorin, p.a., 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.