Description
Quinaldine red is a pure pH-indicator dye used in analytical chemistry for visual endpoint detection and related colour-change applications. The substance carries CAS number 117-92-0 and EG number 204-221-5, with empirical formula C₂₁H₂₃IN₂ and a molar mass of 430,32 g/mol. As a classic quinoline-based indicator, it is employed in titrations and teaching experiments where a clear transition in the acidic to weakly acidic range is required. The pure grade is Solid dye is dissolved according to standard laboratory procedures to prepare working reagents for volumetric analysis and demonstration work. This material from manufacturer Carl ROTH sits in the analytical chemicals and pH-indicators assortment and is intended for professional laboratory use. Documentation via the associated safety data sheet supports compliant handling; no further performance or purity claims are made beyond the pure grade and stated identity data.
This article is part of Reference substances & reagents (other), in Analytical standards & reference materials.
Key features
- Dye content: ≥95 %
- Appearance: green powder
- Maximum absorption: 527-533 nm
- CAS number: 117-92-0
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 204-221-5
- Empirical formula: C₂₁H₂₃IN₂
- Grade: pure
- Molar mass: 430,32 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Quninaldine red, pure, 1 g, glass
What is this article?
Quninaldine red, 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.
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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