Description
Sodium dihydrogen phosphate monohydrate is a monobasic phosphate salt offered at a minimum purity of 98 % in USP and BP quality. It is registered under CAS number 10049-21-5 and EG nr. 231-449-2, with the empirical formula NaH₂PO₄ · H₂O, a molar mass of 137,99 g/mol, and a density of 2,04 g/cm³. This hydrate is a core component of phosphate buffer systems used throughout analytical chemistry, pharmaceutical formulation, and laboratory media preparation. provides a convenient working quantity for solution making and pH adjustment. Available from manufacturer Carl ROTH, the salt dissolves readily in water and is routinely paired with dibasic sodium phosphates to establish stable buffer intervals across acidic to near-neutral ranges. Accurate formula weight including the monohydrate water of crystallisation supports stoichiometric preparation of standard solutions. Laboratories value this grade when pharmacopoeia-aligned monobasic phosphate is required for reproducible buffering, sample work-up, or process-related aqueous chemistry without resorting to lower technical qualities.
This article is part of Inorganic salts, in Inorganic chemicals.
Key features
- Assay (acidim., dry substance): 98,0-100,5 %
- pH-value (5 % solution): 4,2-4,5
- Appearance of solution: clear, colourless
- In H2O insoluble matter: ≤0,2 %
- Loss on drying (130 °C): 11,5-14,5 %
- Chloride (Cl): ≤0,014 %
- Sulphate (SO4): ≤0,03 %
- Al, Ca and related elements: complies
- Arsenic (As): ≤0,0002 %
- Iron (Fe): ≤0,001 %
- CAS number: 10049-21-5
- Pack sizes: 500 g, 1 kg, 2.5 kg, 5 kg, 25 kg
- EG nr.: 231-449-2
- Purity: min. 98 %
- Molar mass: 137,99 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Sodium dihydrogen phosphate monohydrate, min. 98 %, USP, BP, 500 g, plastic
What is this article?
Sodium dihydrogen phosphate monohydrate, min. 98 %, USP, BP, 500 g, plastic is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Inorganic salts, inside Inorganic chemicals, in Produits chimiques.
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 Produits chimiques.
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.
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