72069
Sodium tungstate dihydrate
BioUltra, ≥99.0% (T)
Synonym(s):
Tungstic acid sodium salt dihydrate
About This Item
Recommended Products
product line
BioUltra
Quality Level
assay
≥99.0% (T)
form
crystals
impurities
insoluble matter, passes filter test
≤0.001% total nitrogen (N)
≤0.1% free alkali (as NaOH)
pH
9.5-11.5 (25 °C, 1 M in H2O)
mp
698 °C (lit.)
solubility
H2O: 1 M at 20 °C, clear, colorless
anion traces
chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤100 mg/kg
cation traces
As: ≤0.5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Ni: ≤5 mg/kg
Pb: ≤10 mg/kg
Zn: ≤5 mg/kg
λ
1 M in H2O
UV absorption
λ: 260 nm Amax: ≤0.120
λ: 280 nm Amax: ≤0.035
SMILES string
O.O.[Na+].[Na+].[O-][W]([O-])(=O)=O
InChI
1S/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1;
InChI key
WPZFLQRLSGVIAA-UHFFFAOYSA-N
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General description
Application
Other Notes
signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Oral
wgk_germany
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
dust mask type N95 (US), Eyeshields, Gloves
Certificates of Analysis (COA)
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