| Identification | More | [Name]
Phosphotungstic acid hydrate | [CAS]
12501-23-4 | [Synonyms]
12 TUNGSTO(+6)PHOSPHORIC ACID N-HYDRATE
12-TUNGSTOPHOSPHATE
12-TUNGSTOPHOSPHORIC ACID HYDRATE
12 TUNGSTO(VI) PHOSPHORIC ACID N-HYDRATE
DODECA-TUNGSTOPHOSPHORIC ACID
DODECA-TUNGSTOPHOSPHORIC ACID HYDRATE
PHOSPHOTUNGSTIC ACID
PHOSPHOTUNGSTIC ACID HYDRATE
PHOSPHOTUNGSTIC ACID N-HYDRATE
TUNGSTOPHOSPHORIC ACID
TUNGSTOPHOSPHORIC ACID HYDRATE
TUNGSTOPHOSPHORIC ACID, N-HYDRATE
TUNGSTOPHOSPHORIC ACID SODIUM SALT HYDRATE
heavy acid
phosphowolframic acid
12-Tungstophosphate hydrate
PHOSPHOTUNGSTIC ACID HYDRATE, 99.995%
PHOSPHOTUNGSTIC ACID FREE ACID*CRYSTALLI NE
PHOSPHOTUNGSTIC ACID HYDRATE, FOR MICROS COPY
PhosphotungsticAcidReagent | [EINECS(EC#)]
235-087-6 | [Molecular Formula]
H6O8PW | [MDL Number]
MFCD00149915 | [Molecular Weight]
348.86 | [MOL File]
12501-23-4.mol |
| Chemical Properties | Back Directory | [Appearance]
Crystalline | [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. ]
0-6°C | [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) |
| Safety Data | Back Directory | [Hazard Codes ]
C,Xi | [Risk Statements ]
R34:Causes burns.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S24/25:Avoid contact with skin and eyes .
S37/39:Wear suitable gloves and eye/face protection .
S36:Wear suitable protective clothing . | [RIDADR ]
UN 3260 8/PG 3
| [WGK Germany ]
3
| [RTECS ]
TH5650000
| [F ]
3-10-23 | [TSCA ]
Yes | [HazardClass ]
8 | [HS Code ]
28111990 | [Toxicity]
LD50 orally in Rabbit: 3300 mg/kg |
| Hazard Information | Back Directory | [Chemical Properties]
Crystalline | [Uses]
Phosphotungstic acid hydrate has been a useful histology stain for cell specimens.
| [General Description]
Phosphotungstic acid hydrate is a heteropolyacid. | [Flammability and Explosibility]
Notclassified | [Purification Methods]
A few drops of conc HNO3 are added to 100g of phosphotungstic acid dissolved in 75mL of water, in a separating funnel, and the solution is extracted with diethyl ether. The lowest of the three layers, which contains a phosphotungstic acid-ether complex, is separated, washed several times with 2M HCl, then with water and again extracted with ether. Evaporation of the ether under vacuum with mild heating on a water bath gives crystals which are dried under vacuum and ground [Matijevic & Kerker, J Am Chem Soc 81 1307 1959]. |
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