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Sodium tungstate dihydrate Structure

Sodium tungstate dihydrate

Chemical Properties

Melting point 698 °C(lit.)
Density  4.18
storage temp.  Store at +15°C to +25°C.
solubility  H2O: 1 M at 20 °C, clear, colorless
form  Solid
Specific Gravity 3.25
color  White to slightly yellow
PH 9.5-11.5 (25℃, 1M in H2O)
Odor Odorless
PH Range 9 - 11.5 at 100 g/l at 20 °C
Water Solubility  730 g/L (20 ºC)
λmax λ: 260 nm Amax: ≤0.120
λ: 280 nm Amax: ≤0.035
Merck  14,8698
Exposure limits ACGIH: TWA 3 mg/m3
NIOSH: TWA 1 mg/m3; STEL 3 mg/m3
InChIKey WPZFLQRLSGVIAA-UHFFFAOYSA-N
CAS DataBase Reference 10213-10-2(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII X1F4NY6U13
EPA Substance Registry System Tungstate (WO42-), disodium, dihydrate, (T-4)- (10213-10-2)

Safety

Symbol(GHS)
Signal wordWarning
Hazard statements H302
Precautionary statements P264-P270-P301+P312-P501
Hazard Codes  Xn
Risk Statements  22-36/38-36
Safety Statements  36-37/39-26-39
WGK Germany  1
RTECS  YO7900000
TSCA  Yes
HS Code  28418000
Toxicity LD50 (mg tungstate/kg) in rabbits: 105 i.m.; in rats: 240 s.c. (Venugopal, Luckey)
NFPA 704:
1
2 0

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