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di-Sodium Hydrogen Phosphate Dodecahydrate, 99% Extra Pure

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Price: £6.53

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Stock Availability

On Shelf - Approx. UK delivery date: Tuesday the 07th October 2025*

In bulk stock - ships within 10 - 12 Working Days (Excluding weekends and public holidays)

4 to 6 weeks approx. (Not guaranteed)

UK Shipping

Unfortunately, we are not currently accepting orders for Northern Ireland, Jersey and Guernsey.

We can only ship to the following postcodes where a Royal Mail postal option has been chosen at checkout.

AB, DD, DG3, DG4, DG6 - DG9, EH, FK, G, HS, IM, IV, KA, KW, KY, ML, PA, PH, PO30 - PO41, TD, TR21 - TR25, ZE

* We will always try to ship as early as possible. Delivery could be much quicker than stated but is not guaranteed

Applications

Excipients
Buffers
Chemical analysis
Anti-caking agent
Stabiliser
Thickener

General

What is di-Sodium Hydrogen Phosphate Dodecahydrate? Also known as sodium phosphate dibasic dodecahydrate, it is a chemical compound with the formula Na₂HPO₄ • 12H₂O. It's a hydrated form of disodium hydrogen phosphate, meaning it contains 12 water molecules per formula unit. This compound is widely used in various industries including food, pharmaceuticals, and cosmetics.

Consistent Quality: We provide only high-quality di-Sodium Hydrogen Phosphate Dodecahydrate, ensuring reliable and consistent performance for all applications.

Shipped from Manchester, UK Facility: Sourced and packaged in non-toxic, chemical-resistant containers to ensure safe handling and preserve product quality during transport.

Frequent Uses

Analytical Chemistry
It's frequently used to create buffer solutions, particularly in molecular biology and reverse-phase HPLC. Can also be used as a reagent in chemical analysis, for example, to test for magnesium ions.

Pharmaceutical
Used as an excipient in pharmaceutical formulations, often as a pH adjuster or buffering agent. It can also be found in some over-the-counter medications for digestive issues.

Food Processing
Helps adjust the pH in various food products and prevents powdered products from clumping together (anti-caking agent).

Specification

Pharmacopoeia Specification(s) Ph. Eur., USP

Assay: 98.5 - 102.5 % (Ph. Eur. test)
Assay: 98.0 - 100.5 % (USP test)
M.W.: 358.14
M.F.: Na2HPO4 · 12H2O
Water Insoluble Matter: <0.4%
Reducing Substances: passes test
Monosodium Phosphate: <2.5%
Sulphate (SO4): <0.05%
Iron (Fe): <20ppm
Chloride (Cl): <200ppm
Heavy Metals (as Pb): <10ppm
Arsenic (As):<1ppm
Lead: <1ppm
Cadmium (Cd): <1ppm
Water (KF): <61.0%