Description
Alkali blue 6B (C.I. 42765) is an analytical-grade pH indicator dye supplied as p.a. material for laboratory titration and colour-change applications. It is identified by CAS number 1324-76-1, EG number 215-385-2 and the empirical formula C₃₇H₂₉N₃O₃S, with a molar mass of 595,72 g/mol. Classified under Colour Index 42765, this dye is used where a defined alkali blue response is needed in acid–base indication and related analytical procedures. The product is Analytical chemists rely on such p.a. dyes when establishing clear visual endpoints and maintaining consistent colour standards across series of measurements. Sourced from manufacturer Carl ROTH, Alkali blue 6B fits indicator and analytical-chemical inventories that demand documented identity data. Its molecular formula, CAS registration and p.a. specification support reproducible formulation of indicator reagents in teaching, quality-control and research laboratories.
This article is part of Reference substances & reagents (other), in Analytical standards & reference materials.
Key features
- Appearance: Brownish black powder
- Appearance of solution (0,1 % in H2O): Dark blue solution
- Loss on drying (1 h, 110 °C): ≤6 %
- Transition range: 9.4 (blue)-14.0 (red)
- CAS number: 1324-76-1
- Pack sizes: 10 g, 25 g, 100 g
- EG nr.: 215-385-2
- Molar mass: 595,72 g/mol
- Grade: p.a.
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Alkali blue 6B (C.I. 42765), p.a., 10 g, glass
What is this article?
Alkali blue 6B (C.I. 42765), p.a., 10 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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