Description
Sodium dihydrogen phosphate dihydrate is an inorganic phosphate salt supplied at min. 98 % purity in Ph.Eur. and USP quality, with CAS number 13472-35-0 and empirical formula NaH₂PO₄ · 2 H₂O. The compound has a molar mass of 156,01 g/mol and a density of 1,91 g/cm³, making it a well-defined reagent for buffered systems and pharmacopoeia-grade laboratory work. This material from manufacturer Carl ROTH is listed among salts in pharmacopoeia quality and supports routine inorganic chemistry, formulation development, and quality-control applications where dihydrate stoichiometry and documented purity matter. The solid is straightforward to weigh and dissolve for aqueous media used in research, method validation, and production support. Consistent composition and clear identity data help laboratories maintain reproducible buffer strength and ionic conditions across batches.
This article is part of Inorganic salts, in Inorganic chemicals.
Key features
- Assay (dry substance): 98.0-100.5 %
- Appearance of solution: complies
- In H2O insoluble matter: ≤0.2 %
- pH value (5 % in water): 4.2-4.5
- Loss on drying (130 °C): 21.5-24.0 %
- Chloride (Cl): ≤0.014%
- Sulphate (SO4): ≤0.03 %
- Arsenic (As): ≤0.0001 %
- Lead (Pb): ≤0.0001 %
- Mercury (Hg): ≤0.0001 %
- CAS number: 13472-35-0
- Pack sizes: 1 kg, 2.5 kg, 500 g, 25 kg
- EG nr.: 231-449-2
- Purity: min. 98 %
- Molar mass: 156,01 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Sodium dihydrogen phosphate dihydrate, min. 98 %, Ph.Eur., USP, 1 kg, plastic
What is this article?
Sodium dihydrogen phosphate dihydrate, min. 98 %, Ph.Eur., USP, 1 kg, plastic is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Inorganic salts, inside Inorganic chemicals, in Lab chemicals.
An inorganic salt is an ionic solid, a chloride, a sulfate, a nitrate, a phosphate. The degree of hydration changes the mass that contains one mole of the ion. Analytical grade limits the foreign ions. A hydrate and the anhydrous salt are not interchangeable by weight.
An inorganic chemical is a salt, an acid or base in solid form, a metal, an oxide, or an element. The waters of hydration are part of the formula: a hydrate and an anhydrous salt are different masses for the same ion. Trace metals matter when the salt will be used in analysis. Nanomaterials add particle size to the specification. Look the substance up on PubChem. Hazard classes are on ECHA, under the CLP Regulation and REACH. Transport of the dangerous ones is explained by the UNECE.
Which category should I open next?
The category is Inorganic chemicals. The sub-category is Inorganic salts. The catalogue is Lab chemicals.
Shelves beside this one are Metals, elements & oxides and Nanomaterials & quantum dots.
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.
How does ordering and shipping work?
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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
