Description
Hydroxy naphthol blue disodium salt is an analytical metal indicator supplied in p.a. and ACS quality, with CAS number 165660-27-5 and empirical formula C₂₀H₁₂N₂Na₂O₁₁S₃. The compound has a molar mass of 598,50 g/mol and a density of 2,13 g/cm³. It is These constants and the CAS identity are those published by manufacturer Carl ROTH for this disodium salt. Hydroxy naphthol blue disodium salt is listed among metal indicators used in analytical chemistry, where a defined p.a. and ACS grade is specified. The empirical formula C₂₀H₁₂N₂Na₂O₁₁S₃ and the molar mass of 598,50 g/mol allow gravimetric preparation of indicator solutions from. Density 2,13 g/cm³ is the stated solid-state value for documentation and inventory records. Laboratories working with metal indicators can select this reagent when the specification calls for hydroxy naphthol blue disodium salt, p.a., ACS. and the published physical data describe this analytical grade.
This article is part of Analytical grade solvents (p.a.), in Solvents.
Key features
- Appearance: dark blue crystals
- Loss on drying: ≤6 %
- Suitable for calcium determination: complies
- CAS number: 165660-27-5
- Pack sizes: 5 g, 25 g
- Empirical formula: C₂₀H₁₂N₂Na₂O₁₁S₃
- Molar mass: 598,50 g/mol
- Density: 2,13 g/cm³
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
WarningHazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about Hydroxy naphthol blue disodium salt, p.a., ACS, 5 g, glass
What is this article?
Hydroxy naphthol blue disodium salt, p.a., ACS, 5 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.
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