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Phosphotungstic acid hydrate Structure

Phosphotungstic acid hydrate

Chemical Properties

Melting point ~95 °C(lit.)
Boiling point 107.9℃[at 101 325 Pa]
Density  3.88[at 20℃]
vapor pressure  19.2hPa at 20℃
storage temp.  room temp
form  Solid
color  White
PH 1.3 (20g/l, H2O, 20℃)
Water Solubility  soluble
Sensitive  Hygroscopic
Exposure limits ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3
Stability hygroscopic
CAS DataBase Reference 12501-23-4(CAS DataBase Reference)


Signal wordDanger
Hazard statements H302-H314-H411
Precautionary statements P260-P273-P280-P301+P312-P303+P361+P353-P305+P351+P338
Hazard Codes  C,Xi
Risk Statements  34-36/37/38
Safety Statements  26-36/37/39-45-24/25-37/39-36
RIDADR  UN 3260 8/PG 3
WGK Germany  3
RTECS  TH5650000
HS Code  2811 19 80
HazardClass  8
Toxicity LD50 orally in Rabbit: 3300 mg/kg
NFPA 704:
3 1

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Phosphotungstic acid hydrate Spectrum