Description
Orange IV sodium salt (C.I. 13080) is a microscopy-grade azo dye for laboratory staining and indicator applications. It is specified with CAS number 554-73-4, EG number 209-071-4, and the empirical formula C₁₈H₁₄N₃NaO₃S, together with a molar mass of 375,39 g/mol. Listed under Colour Index C.I. 13080, this sodium salt is selected when protocols call for an orange dye with a documented chemical identity in biological or analytical work. provides a convenient laboratory quantity for preparing stain solutions, indicator stocks, and comparative microscopy series without unnecessary bulk. Use cases align with analytical chemicals, pH-indicator practice, and dyes employed in microscopy workflows where controlled colour development is essential. Orange IV sodium salt from manufacturer Carl ROTH supports reproducible reagent preparation across research, teaching, and routine laboratory settings. The stated molar mass facilitates accurate weighing and concentration calculations when dissolving the solid. Packaged in glass, the dye is suited to orderly bench handling and repeated small-scale preparations typical of histology support, educational microscopy, and analytical colour-test procedures.
This article is part of Reference substances & reagents (other), in Analytical standards & reference materials.
Key features
- Appearance: orange powder
- pH-transition range: 1,2 (red)-2,7 (yellow)
- CAS number: 554-73-4
- Pack sizes: 5 g, 25 g, 100 g
- EG nr.: 209-071-4
- Empirical formula: C₁₈H₁₄N₃NaO₃S
- Molar mass: 375,39 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
WarningHazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about Orange IV sodium salt (C.I. 13080), for microscopy, 5 g, glass
What is this article?
Orange IV sodium salt (C.I. 13080), for microscopy, 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.
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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.
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