Barium selenite

Barium selenite Property

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)

Safety

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 

TSCA listed

HazardClass 

6.1

PackingGroup 

I

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Hazard statements

H301Toxic if swalloed

H331Toxic if inhaled

H373May cause damage to organs through prolonged or repeated exposure

H400Very toxic to aquatic life

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P273Avoid release to the environment.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P311Call a POISON CENTER or doctor/physician.

P314Get medical advice/attention if you feel unwell.

P330Rinse mouth.

P391Collect spillage. Hazardous to the aquatic environment

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

P501Dispose of contents/container to..…

Barium selenite Chemical Properties,Usage,Production

Description

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.

Chemical Properties

solid [ALD93]

Physical properties

The heat of formation of barium selenite is: △_fH298 - BaSeO3 = 2230.6 kcal/mol (—964.7 kJ/mol). The precipitate of barium selenite is not oxidized by air during drying at 110°C. In air, however, it oxidizes to the selenate at about 700–750°C:
2BaSeO3+ O2+ heat 2BaSeO4
Bariumselenite is a fine white crystalline powder that is mainly used in the glass industry to color and decolor glass.

Uses

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.

Reactivity Profile

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. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive. Noncombustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Health Hazard

Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

Fire Hazard

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways.

Flammability and Explosibility

Not classified