Name | Selenic acid |
Synonyms | UN1905 HSDB 675 Selenic acid SELENIC ACID AR Selenocystathionine diammonium selenate dipotassium selenate Selenic acid (H2SeO4) selenic acid solution Selenic acid [UN1905] [Corrosive] 2-amino-4-(2-amino-3-hydroxy-3-oxopropyl)selanylbutanoic acid |
CAS | 7783-08-6 |
EINECS | 231-979-4 |
InChI | InChI=1/2H3N.H2O4Se/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4) |
Molecular Formula | H2O4Se |
Molar Mass | 144.97 |
Density | 1.407g/mLat 25°C |
Melting Point | 58°C |
Boling Point | 260°C |
Flash Point | >230°F |
Water Solubility | g/100g H2O: 426 (0°C), 567 (20°C), 1328 (30°C) [LAN05]; decomposed by alcohol [HAW93] |
Solubility | Miscible with sulfuric acid. Immiscible with ammonia. |
Appearance | Liquid |
Color | Colorless |
Exposure Limit | ACGIH: TWA 0.2 mg/m3NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3 |
Merck | 14,8429 |
pKa | 4.19±0.10(Predicted) |
PH | 2.74(1 mM solution);1.83(10 mM solution);0.97(100 mM solution) |
Stability | Stable, but decomposes on heating. Non-flammable. Incompatible with metals, combustible materials. Hygroscopic. |
Refractive Index | n20/D 1.5174(lit.) |
Use | Used as an analytical reagent and also for the preparation of selenium salts |
Risk Codes | R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R34 - Causes burns R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R33 - Danger of cumulative effects R23/25 - Toxic by inhalation and if swallowed. R41 - Risk of serious damage to eyes R38 - Irritating to the skin |
Safety Description | S23 - Do not breathe vapour. 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 the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S60 - This material and its container must be disposed of as hazardous waste. S28 - After contact with skin, wash immediately with plenty of soap-suds. S20/21 - S16 - Keep away from sources of ignition. |
UN IDs | UN 3264 8/PG 1 |
WGK Germany | 2 |
RTECS | VS6575000 |
TSCA | Yes |
Hazard Class | 8 |
Packing Group | I |