Basic information
- Standard SMILES
O.O.[Na+].[Na+].[O]=[W](=[O])([O-])[O-]- InChIKey
WPZFLQRLSGVIAA-UHFFFAOYSA-N- Molecular formula
- 2Na.W.O4.2 H2O
- Average molar mass
- 329.85 g/mol
- Monoisotopic mass
- 329.93125761
Overview
Sodium tungstate dihydrate is a hydrate that is the dihydrate form of sodium tungstate. Combines with hydrogen peroxide for the oxidation of secondary amines to nitrones. It has a role as a reagent. It contains a sodium tungstate.
Names & identifiers
- Preferred name
- Sodium Tungstate Dihydrate
- IUPAC
- disodium;dioxido(dioxo)tungsten;dihydrate
- English name
- Sodium tungstate dihydrate
- Molecular formula
- H2NaO5W-
- Molecular weight
- 288.84
Names & synonyms
Sodium tungstate dihydrate10213-10-2Sodium tungstate, dihydrateTungstic acid, sodium salt, dihydratesodium tungstate(VI) dihydrateNa2WO4.2H2Osodium orthotungstate dihydrateX1F4NY6U13DTXSID0032079CHEBI:63939RefChem:184146DTXCID8012079
Show more names
FOLINSODIUM TUNGSTEN OXIDESODIUM TUNGSTATE 2H2OSodium tungstate dihydrateSODIUM WOLFRAMATESodiumTungstateGrSodium tungstate dihSODIUM TUNGSTATE, ACSSODIUM WOLFRAMATE 2H2O
600-275-2Tungstic acid sodium salt dihydrateMFCD00149190disodium;dioxido(dioxo)tungsten;dihydrateSodium tungsten oxide dihydrateTungstate (WO42-), disodium, dihydrate, (T-4)- (9CI)UNII-X1F4NY6U13Tungstic acid (H2WO4), disodium salt, dihydrate
Database identifiers
- CAS
10213-10-2- PubChem CID
- 150191
- DTXSID
DTXSID0032079- ChEBI
CHEBI:63939- UNII
- X1F4NY6U13
- EC Number
- 600-275-2
Properties
Computed structural properties
- Topological polar surface area
- 82.3 Ų
- Hydrogen bond donors
- 2
- Hydrogen bond acceptors
- 6
- Rotatable bonds
- 0
- Heavy atoms
- 9
- Formal charge
- 0
- Complexity
- 62.2
Experimental & physicochemical properties
Chemical ClassesMetals -> Metals, Inorganic Compounds
Density3.25 @25 °C
Physical DescriptionColorless or white solid; Effloresces in dry air; [Merck Index] White odorless powder; Soluble in water; [Alfa Aesar MSDS]
Physicochemical properties
- Melting point
- 698 °C · 698 °C(lit.)
- Density
- 4.18 · 4.18
- bulk density
- 1600 kg/m3 · 1600kg/m3
- storage temp.
- 15 °C · Store at +15°C to +25°C.
- solubility
- 2 O: · H2O: 1 M at 20 °C, clear, colorless
- form
- Solid
- Specific Gravity
- 3.25 · 3.25
- color
- White to slightly yellow
- Odor
- Odorless
- PH Range
- 9 · 9 - 11.5 at 100 g/l at 20 °C
- PH
- 9.5 · 9.5-11.5 (25℃, 1M in H2O)
- Water Solubility
- 730 g/L · 730 g/L (20 ºC)
- λmax
- 260 nm · λ: 260 nm Amax: ≤0.120λ: 280 nm Amax: ≤0.035
- Merck
- 14 · 14,8698
- Exposure limits
- 3 mg/m3NIOSH: · ACGIH: TWA 3 mg/m3NIOSH: TWA 1 mg/m3; STEL 3 mg/m3
- InChI
- 1S/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1;
- InChIKey
- WPZFLQRLSGVIAA-UHFFFAOYSA-N
- SMILES
- O.O.[Na+].[Na+].[O-][W]([O-])(=O)=O
- Toxicology and Carcinogenesis
- Toxicology and Carcinogenesis Studies of Sodium Tungstate Dihydrate (CASRN 10213-10-2) in Sprague Dawley (Hsd:Sprague Dawley SD) Rats and B6C3F1/N Mice (Drinking Water Studies)
- CAS DataBase Reference
- 10213 · 10213-10-2(CAS DataBase Reference)
- EWG's Food Scores
- 1 · 1
- FDA UNII
- 1 F4NY6U13 · X1F4NY6U13
- EPA Substance Registry System
- Tungstate (WO42-), disodium, dihydrate, (T-4)- (10213-10-2)
- UNSPSC Code
- 12352302 · 12352302
- NACRES
- 55 · NA.55
- Symbol(GHS)
- 7 · GHS07
- Signal word
- Warning
- Hazard statements
- 302 · H302
- Precautionary statements
- 264 · P264-P270-P301+P312-P501
- PPE
- 95 · dust mask type N95 (US), Eyeshields, Gloves
- Hazard Codes
- Xn
- Risk Statements
- 22 · 22-36/38-36
- Safety Statements
- 36 · 36-37/39-26-39
- WGK Germany
- 1 · 1
- RTECS
- 7900000 · YO7900000
- TSCA
- Yes
- HS Code
- 28418000 · 28418000
- Storage Class
- 13 · 13 - Non Combustible Solids
- Hazard Classifications
- 4 Oral · Acute Tox. 4 Oral
- Toxicity
- 50 · LD50 (mg tungstate/kg) in rabbits: 105 i.m.; in rats: 240 s.c. (Venugopal, Luckey)
Safety & regulation
GHS classification
GHS Classification
Warning
H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]
P264, P270, P301+P317, P330, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 214 reports by companies from 4 notifications to the ECHA C&L Inventory.
Hazard information
Regulatory Information
Chemical: Tungstate (WO42-), disodium, dihydrate, (T-4)-
Sodium tungstate, dihydrate: Does not have an individual approval but may be used under an appropriate group standard
Hazards SummaryCauses somnolence and coma in intraperitoneal lethal-dose studies of mice and rats; [RTECS] A strong eye irritant; Harmful by ingestion; [Alfa Aesar MSDS] See Sodium tungstate.
Hazard Classes and CategoriesAcute Tox. 4 (100%)
Safety & protection
Threshold Limit Values (TLV)3.0 [mg/m3], as W, respirable particulate matter
Protective Action Criteria (PAC)
5.4 [mg/m3]
44 [mg/m3]
260 [mg/m3]
Toxicology
Carcinogen Classification
Sodium tungstate dihydrate
TR-599: Toxicology and Carcinogenesis Studies of Sodium Tungstate Dihydrate (CASRN 10213-10-2) in Sprague Dawley (Hsd:Sprague Dawley SD) Rats and B6C3F1/N Mice (Drinking Water Studies) (2021 )
04/02/21
No Evidence
Equivocal Evidence
Equivocal Evidence
RAIS Toxicity Values
0.0008
PPRTV Current
0.008
PPRTV Current
EPA Provisional Peer-Reviewed Toxicity Values
Sodium Tungstate Dihydrate
8 x 10^-4 mg/kg-day
8 x 10^-3 mg/kg-day
PDF Document
Inadequate information to assess carcinogenic potential
2015
Hazard Quotient Level 0.1 or Cancer Risk Level 1E-06
6.30e+01
9.30e+02
1.60e+01
4.00e+03
8.00e-04
Volatile
Hazard Quotient Level 3 or Cancer Risk Level 1E-04
1.90e+02
2.80e+03
4.80e+01
4.00e+03
8.00e-04
Volatile
Safety data
- PPE
- dust mask type N95 (US), Eyeshields, Gloves
- wgk
- 1
- tsca
- Yes
- rtecs
- YO7900000
- hs_code
- 28418000
- Toxicity
- LD50 (mg tungstate/kg) in rabbits: 105 i.m.; in rats: 240 s.c. (Venugopal, Luckey)
- risk_code
- 22-36/38-36
- Signal word
- Warning
- Symbol(GHS)
- GHS07
- hazard_code
- Xn
- safety_code
- 36-37/39-26-39
- Storage Class
- 13 - Non Combustible Solids
- Hazard statements
- H302
- Hazard Classifications
- Acute Tox. 4 Oral
- Precautionary statements
- P264-P270-P301+P312-P501
Chemistry & industry
Uses & manufacturing
Uses
Used to fireproof and waterproof fabrics, to make tungsten compounds, as a protective colloid, as a precipitant for alkaloids and proteins, to catalyze oxidation reactions, and as a corrosion inhibitor for steel; [Merck Index]
Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
Applications
UsesSodium tungstate dihydrate is currently being investigated as a potential therapy for obesity. Sodium tungstate dihydrate is also an inhibitor of acid phosphatases.
UsesSodium tungstate dihydrate may be used in the preparation of aqueous sols of tungsten oxide dihydrate.
UsesFireproofing and waterproofing fabrics; preparing complex Compounds such as phosphotungstate and silicotungstate; as a protective colloid in biological development methods; precipitant for alkaloids; catalyst in oxidation reactions; corrosion inhibitor for steel.
General DescriptionSodium tungstate dihydrate is a sodium salt of tungstic acid, which occurs as white colorless crystals.
Upstream & downstream products
Upstream raw materials
Downstream products
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Additional notes
DefinitionChEBI: A hydrate that is the dihydrate form of sodium tungstate. Combines with hydrogen peroxide for the oxidation of secondary amines to nitrones
Related reactions
106 records
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