1.00659

Tungstosilicic acid hydrate

for analysis EMSURE^®

• Synonym(s): Tungstosilicic acid hydrate, Silicotungstic acid, Wolframosilicic acid
• Linear Formula: H₄[Si(W₃O₁₀)₄] · x H₂O
• CAS Number: 12027-43-9
• Molecular Weight: 2878.17 (anhydrous basis)
• MDL number: MFCD00150392
• UNSPSC Code: 12352301
• EC Index Number: 234-719-8
• NACRES: NA.21

Properties

• grade: reagent
• Quality Level: 300
• product line: EMSURE^®
• form: solid
• impurities: ≤20 ppm Total nitrogen (N)
• loss: ≤16% loss on ignition, 750 °C
• solubility: water: soluble at 20 °C
• bulk density: 200‑500 kg/m³
• anion traces: chloride (Cl^-): ≤20 ppm; sulfate (SO₄^2-): ≤50 ppm
• cation traces: Fe: ≤10 ppm; K: ≤200 ppm; Na: ≤200 ppm; heavy metals (as Pb): ≤20 ppm
• storage temp.: 15-25°C
• SMILES string: [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.[W](=O)(=O)=O.[W](=O)(=O)=O.[Si](O)(O)(O)O.O
• InChI: 1S/H4O4Si.H2O.36O.12W/c1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h1-4H;1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
• InChI key: ACTPFSYIGLFGLY-UHFFFAOYSA-N

Description

Analysis Note

Identity: passes test
Chloride (Cl): ≤ 20 ppm
Sulphate (SO₄): ≤ 50 ppm
Total nitrogen (N): ≤ 20 ppm
Heavy metals (as Pb): ≤ 20 ppm
Fe (Iron): ≤ 10 ppm
K (Potassium): ≤ 200 ppm
Na (Sodium): ≤ 200 ppm
Loss on ignition (750 °C): ≤ 16 %

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable