7787-41-9 Usage
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]
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.
Check Digit Verification of cas no
The CAS Registry Mumber 7787-41-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,8 and 7 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7787-41:
(6*7)+(5*7)+(4*8)+(3*7)+(2*4)+(1*1)=139
139 % 10 = 9
So 7787-41-9 is a valid CAS Registry Number.
InChI:InChI=1/Ba.H2O4Se/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
