Description
Phenol red solution R₂ is a Reag. Ph. Eur. reagent according to Chapter 4.1.1 (reference 1063603), Chemical identity is defined by CAS number 143-74-8, EG number 205-609-7 and the empirical formula C₁₉H₁₄O₅S; the molar mass is 354,38 g/mol. Listed physical data include a density of approximately 1 g/cm³ and a boiling point of 100 °C for this preparation. has a weight of 0,200 kg. This phenol red solution R₂ from manufacturer Carl ROTH supports laboratory work that follows European Pharmacopoeia reagents in Chapter 4.1.1 and that specifies the R₂ solution. Formula C₁₉H₁₄O₅S and CAS number 143-74-8 allow matching to pharmacopoeial and inventory records, while the molar mass of 354,38 g/mol can be cited in analytical documentation. Density near 1 g/cm³ and a boiling point of 100 °C complete the available characterisation. Eur. reagent collections that call for phenol red solution R₂ under reference 1063603.
This article is part of Indicators & indicator solutions, in Analytical standards & reference materials.
Key features
- CAS number: 143-74-8
- Pack sizes: 100 ml, 500 ml
- EG nr.: 205-609-7
- Empirical formula: C₁₉H₁₄O₅S
- Molar mass: 354,38 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Phenol red solution R2, Reag. Ph. Eur., 100 ml
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Phenol red solution R2, Reag. Ph. Eur., 100 ml is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Indicateurs & solutions indicatrices, inside Étalons analytiques & matériaux de référence, in Produits chimiques.
An indicator solution changes colour at a stated point, usually a pH interval or a redox potential, so a titration endpoint can be seen. The solvent and the concentration decide how sharp the change is. A solid indicator dye and a ready solution are different articles.
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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