Sodium phosphate dibasic

SIGMA/RDD022 - anhydrous, free-flowing, Redi-Dri^™, ReagentPlus^®, ≥99.0%

Synonym: sec-Sodium phosphate; Disodium hydrogen phosphate; Disodium phosphate; Sodium hydrogenphosphate

CAS Number: 7558-79-4
Empirical Formula (Hill Notation): Na₂HPO₄
Molecular Weight: 141.96
EC Number: 231-448-7
MDL Number: MFCD00003496
Linear Formula: Na₂HPO₄
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-RDD022-500G	500 g	$99.70 1/EA	Add To Favorites
45-RDD022-1KG	1 kg	$160.00 1/EA	Add To Favorites
45-RDD022-2.5KG	2.5 kg	$246.00 1/EA	Add To Favorites

The Redi-Dri™ packaging system eliminates the common issue of clumping that is noted with many hygroscopic salts and buffers and provides free-flowing, ready-to- use material at all times.

This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.

This image depicts SKU: RDD022-500G

Properties
Descriptions
Safety Info.
Basic Data

assay	≥99.0%
form	powder
grade	anhydrous
InChI	1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2
InChI key	BNIILDVGGAEEIG-UHFFFAOYSA-L
loss	≤1.0% loss on drying
pH	8.9-9.2 (25 °C, 50 g/L in water)
pKa (25 °C)	(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
product line	ReagentPlus^®
	Redi-Dri^™
quality	free-flowing
Quality Level	100
SMILES string	[Na+].[Na+].[H]OP([O-])([O-])=O
solubility	water: 100 mg/mL, clear, colorless

Application:	Solid-State NMR Spectroscopy to Probe State and Phase Transitions in Frozen Solutions: This study utilized Sodium phosphate dibasic in the development of formulations for solid-state NMR spectroscopy, focusing on its utility in stabilizing and buffering various chemical environments within in vitro diagnostics manufacturing. This application ensures precise diagnostics by maintaining the integrity of the solution during freezing and thawing cycles (Du et al., 2023 ). Arabinoxylan in Water through SANS: Single-Chain Conformation, Chain Overlap, and Clustering: This paper discusses the application of Sodium phosphate dibasic in the creation of specific buffer solutions for the structural analysis of polysaccharides using small-angle neutron scattering (SANS), a technique often employed in the pharmaceutical and biotechnological industries to ensure high-quality standards in diagnostics production (Petermann et al., 2023 ).
General description:	Sodium phosphate dibasic is a commonly used buffer in frozen formulations.
Legal Information:	ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany
Legal Information:	Redi-Dri is a trademark of Sigma-Aldrich Co. LLC
Packaging:	1 kg in poly bottle
Packaging:	2.5 kg in poly drum
Packaging:	500 g in poly bottle

WGK Germany	WGK 1
Flash Point(F)	Not applicable
Flash Point(C)	Not applicable

Purity	≥99.0%
UNSPSC	12161700

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