Sodium polytungstate

SIGMA/71913 - purum p.a., for the preparation of heavy liquid, for sink-float analysis, ≥85% WO₃ basis

Synonym: Sodium metatungstate; hexa-Sodium tungstate (W₁₂)

CAS Number: 12141-67-2
Empirical Formula (Hill Notation): Na₆O₃₉W₁₂ · H₂O
Molecular Weight: 2986.01
EC Number: 412-770-9
MDL Number: MFCD00061466
Linear Formula: 3Na₂WO₄ · 9WO₃ · H₂O
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-71913-25G	25 g	$160.00 1/EA	Add To Favorites
45-71913-100G	100 g	$484.00 1/EA	Add To Favorites

Properties
Descriptions
Safety Info.
Basic Data

application(s)	diagnostic assay manufacturing hematology histology
assay	≥85% WO₃ basis
color	white to off-white
density	3.1 g/cm³ at 20 °C (saturated aqueous solution)
form	powder or crystals
grade	for sink-float analysis
	purum p.a.
InChI	1S/6Na.39O.12W/q6+1;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;6-1;;;;;;;;;;;;
InChI key	AZCSOJKJFMWYCX-UHFFFAOYSA-N
pH	3 (20 °C)
quality	for the preparation of heavy liquid
Quality Level	100
SMILES string	[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O
storage temp.	room temp

Application:	Sodium polytungstate (SPT) is widely used to produce heavy liquid for sink /float analysis (gravity separation) and density gradient centrifugation due to its very high solubility in water.
Other Notes:	A new medium for density-gradient centrifugation, the density can be adjusted to up to 3.1 g/ml

Symbol	GHS05,GHS07
Signal word	Danger
Hazard statements	H302 - H318 - H412
Precautionary statements	P273 - P280 - P301 + P312 + P330 - P305 + P351 + P338 + P310
Hazard Codes	Xn
Risk Statements	22-41-52/53
Safety Statements	22-26-39-61
RIDADR	NONH for all modes of transport
WGK Germany	WGK 2
Flash Point(F)	Not applicable
Flash Point(C)	Not applicable

Purity	≥85% WO₃ basis
Density	3.1 g/cm³ at 20 °C (saturated aqueous solution)
Storage Temp.	room temp
UNSPSC	12352207

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