BARIUM SELENATE
- CAS No.
- 7787-41-9
- Chemical Name:
- BARIUM SELENATE
- Synonyms
- Bariumselenat;BARIUM SELENATE;BARIUM SELENATE(VI);barium(2+),selenate;Barium selenate, 99.9%;Selenic acid barium salt;selenicacid,bariumsalt(1:1);Barium selenate, 99.9% (metals basis)
- CBNumber:
- CB1481776
- Molecular Formula:
- BaH4O4Se
- Molecular Weight:
- 284.33
- MOL File:
- 7787-41-9.mol
- Modify Date:
- 2023/10/17 17:11:42
| Melting point | >350 °C(lit.) |
|---|---|
| Density | 4.750 |
| form | white rhombohedral crystals |
| color | white rhomb crystals, crystalline |
| Water Solubility | g/L soln; H2O; 0.081 (25°C); soluble HCl, insoluble HNO3 [MER06] [KRU93] |
| Solubility Product Constant (Ksp) | pKsp: 7.47 |
| 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 | 7787-41-9 |
| EPA Substance Registry System | Selenic acid, barium salt (1:1) (7787-41-9) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |    GHS06,GHS08,GHS09 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Hazard statements | H301-H331-H373-H400-H410 | |||||||||
| Precautionary statements | P260-P301+P310a-P304+P340-P311a-P405-P501a | |||||||||
| Hazard Codes | T,N | |||||||||
| Risk Statements | 23/25-33-50/53 | |||||||||
| Safety Statements | 20/21-28-45-60-61 | |||||||||
| RIDADR | UN 2630 6.1/PG 1 | |||||||||
| WGK Germany | 2 | |||||||||
| TSCA | Yes | |||||||||
| HazardClass | 6.1(a) | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 28419000 | |||||||||
| NFPA 704 |
|
BARIUM SELENATE Chemical Properties,Uses,Production
Description
Barium selanate has the molecular formula of BaSeO4
and the molecular weight of 280.2748 g/mol. It can be
prepared by reacting sodium selenate with barium chloride
in solution:
BaCl2(aq)+ Na2SeO4(aq) ? BaSeO4+ 2NaCl(aq)
Barium selenate is slightly soluble in water at
0.0052 g/100 ml at 20°C. Its CAS number is 7787-41-9.
It is a white rhombic crystal which decomposes when
heated beyond about 425°C. It is slightly soluble in
water at 0.0152 g/100 ml at 20°C. Its solubility product
is 3.40×10-8.
The heat of formation of barium selenate is:
△H298 BaSeO4 = -249.0 kcal/mol (-1041.8 kJ/mol).
As a result of the measurements, it has been found
that for the reaction:
Basolid+ Sesolid+ 2O2 = BaSeO4
△H298 = -279.2 cal/mol
△F298 = -249.1 cal/mol
Chemical Properties
orthorhombic crystal(s); preparation: heating BaCO3 and Se [MER06]
Reactivity Profile
Inorganic oxidizing agents can react with reducing agents to generate heat and products that may be gaseous (causing pressurization of closed containers). The products may themselves be capable of further reactions (such as combustion in the air). The chemical reduction of materials in this group can be rapid or even explosive, but often requires initiation (heat, spark, catalyst, addition of a solvent). Explosive mixtures of inorganic oxidizing agents with reducing agents often persist unchanged for long periods if initiation is prevented. Such systems are typically mixtures of solids, but may involve any combination of physical states. Some inorganic oxidizing agents are salts of metals that are soluble in water; dissolution dilutes but does not nullify the oxidizing power of such materials. Organic compounds in general have some reducing power and can in principle react with compounds in this class. Actual reactivity varies greatly with the identity of the organic compound. Inorganic oxidizing agents can react violently with active metals, cyanides, esters, and thiocyanates. Explosives often consist of an inorganic oxidizing agent mixed in intimate contact with a reducing agent. Gunpowder is such a mixture. Other examples are a mixture of sugar (an organic compound) plus sodium chlorate and magnesium (an inorganic reducing agent) plus barium peroxide.
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.
BARIUM SELENATE Preparation Products And Raw materials
| Supplier | Tel | Country | ProdList | Advantage | Inquiry |
|---|---|---|---|---|---|
| Shaanxi Didu New Materials Co. Ltd | +86-89586680 +86-13289823923 | China | 8673 | 58 | Inquiry |
| MP Biomedicals, Inc. | 949 833 2500 | United States | 6566 | 81 | Inquiry |
| Pfaltz & Bauer, Inc. | (800) 225-5172 | United States | 6830 | 72 | Inquiry |
| Wako Pure Chemical Industries, Ltd. | +81 6 6203 3741 | Japan | 6828 | 80 | Inquiry |
| City Chemicals Corporation | 800-248-2436 | United States | 6462 | 72 | Inquiry |
| Chemiplus Corporation | +81-3-3440-9015 | United States | 3202 | 38 | Inquiry |
| Service Chemical Inc. | 888-895-6920 | Germany | 6373 | 71 | Inquiry |
| 3B Scientific Corporation | 847.281.9822 | United States | 6744 | 47 | Inquiry |
| City Chemical LLC | 1-203-932-2489 | United States | 6710 | 72 | Inquiry |
| 2A PharmaChem USA | (630) 737-0988 | United States | 6148 | 39 | Inquiry |
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