Barium selenite , 97 , 13718-59-7
CAS NO.：13718-59-7
Empirical Formula: BaO3Se
Molecular Weight: 264.29
MDL number: MFCD00003446
EINECS: 237-280-0
PRODUCT Properties
| solubility | insoluble in H2O |
| form | solid |
| Water Solubility | g/100g solution H2O: 0.005 (0°C), 0.005 (25°C); solid phase, BaSeO3 [KRU93] |
| Exposure limits | ACGIH: TWA 0.5 mg/m3; TWA 0.2 mg/m3 NIOSH: IDLH 50 mg/m3; IDLH 1 mg/m3; TWA 0.5 mg/m3; TWA 0.2 mg/m3 |
| CAS DataBase Reference | 13718-59-7(CAS DataBase Reference) |
| EPA Substance Registry System | Selenious acid, barium salt (1:1) (13718-59-7) |
Description and Uses
Barium selenite has the molecular formula of BaSeO3
and the molecular weight of 264.2865 g/mol. Its CAS
number is 13718-59-7. It is a white solid that is insoluble
in water. It can be prepared by the addition of sodium
selenite to a solution of barium chloride:
BaCl2(aq)+ Na2SeO3(aq) ? BaSeO3(solid)
It can also be prepared by treating a solution of
barium chloride with selenous acid and adding sodium
carbonate to start precipitation. There is no record of
a hydrate and the anhydrate is stable upon heating to
over 950 °C.
Barium selenite is primarily chosen for producing special glass and leads to the formation of glass with high index of refraction. Barium selenite has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. Noncombustible, the substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes of SeO2.
Safety
| Symbol(GHS) |   GHS06,GHS08 |
| Hazard statements | H300-H310-H330-H373 |
| Precautionary statements | P301+P310a-P304+P340-P320-P330-P405-P501a |
| Hazard Codes | T,N |
| Risk Statements | 23/24/25-50/53-33-23/25 |
| Safety Statements | 22-26-36/37/39-45-61-60-28-20/21 |
| RIDADR | UN 2630 6.1/PG 1 |
| WGK Germany | 2 |
| TSCA | Yes |
| HazardClass | 6.1 |
| PackingGroup | I |
