Description
Nitrazine yellow (C.I. 14890) is an analytical-grade pH indicator dye supplied as a p.a. quality reagent for laboratory use. It is identified by CAS number 5423-07-4 and the empirical formula C₁₆H₈N₄Na₂O₁₁S₂, with a molar mass of 542,36 g/mol. This azo dye is widely employed in analytical chemistry for visual pH determination and related indicator applications where a defined colour response is required. The material is Categories of use include analytical chemicals and dedicated pH-indicator work, supporting titration endpoints, buffer checks, and qualitative colour-change tests. Nitrazine yellow from manufacturer Carl ROTH is presented under Colour Index designation C.I. 14890, helping laboratories cross-reference dye identity across protocols and literature. The solid reagent integrates readily into standard laboratory practice for indicator preparation and comparative staining or colourimetry studies that call for a well-characterised nitrazine yellow grade.
This article is part of Analytical grade solvents (p.a.), in Solvents.
Key features
- Appearance: brown to orange powder
- Appearance of solution (0,1 % in H2O): clear, yellow to brown
- pH-transition range: 6,0 (yellow)-7,2 (blue)
- CAS number: 5423-07-4
- Pack sizes: 1 g, 5 g, 10 g
- Empirical formula: C₁₆H₈N₄Na₂O₁₁S₂
- Molar mass: 542,36 g/mol
- Grade: p.a.
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Nitrazine yellow (C.I. 14890), p.a., 1 g, glass
What is this article?
Nitrazine yellow (C.I. 14890), 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.
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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Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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