Description
di-Sodium hydrogen phosphate is an anhydrous inorganic salt of analytical grade, supplied at min. 99 % purity to p.a. and ACS specifications. With CAS number 7558-79-4 and empirical formula Na₂HPO₄, it has a molar mass of 141,96 g/mol and is widely used as a buffering component, reagent, and reference material in environmental analysis and staining workflows. The material is provided as a free-flowing anhydrous solid Produced by manufacturer Carl ROTH, this grade supports reproducible results in analytical chemistry, sample preparation, and quality-control applications where defined phosphate content and high purity are required. Its chemical identity and ACS/p.a. classification make it suitable for general laboratory use across research, teaching, and industrial analytical settings that rely on consistent inorganic salts.
This article is part of Analytical grade solvents (p.a.), in Solvents.
Key features
- Assay (acidim.): ≥99.0 %
- pH value (5 % in water): 8,7-9,3
- In H2O insoluble matter: ≤0.01 %
- Loss on drying (105 °C): ≤0.2 %
- Total nitrogen (as N): ≤0.002 %
- Chloride (Cl): ≤0.002 %
- Pyrophosphate (P2O7): ≤0.2 %
- Sulphate (SO4): ≤0.005 %
- Arsenic (As): ≤0.00005 %
- Lead (Pb): ≤0.001 %
- CAS number: 7558-79-4
- Pack sizes: 500 g, 1 kg, 2.5 kg
- Purity: min. 99 %, p.a., ACS
- Empirical formula: Na₂HPO₄
- Molar mass: 141,96 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about di-Sodium hydrogen phosphate, min. 99 %, p.a., ACS, anhydrous, 500 g, plastic
What is this article?
di-Sodium hydrogen phosphate, min. 99 %, p.a., ACS, anhydrous, 500 g, plastic 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.
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