R 2 M o 0 4 Here is a group of molybdate compounds that has never b e e n fully exp lo i ted . They've found important applications in catalysts, ceramics, ferti l izers, pharmaceut icals , pigments and metal-treating compounds.

W e don' t know what else they a r e g o o d for, but w e do know that they a re versatile and show great potent ia l .

Here a r e their properties — maybe you'll find just what you are look ing fo r .

mo"5 i / !3 rl.r?'*o i o n . Alkali, ammonium, Mg, Be, and Tl molybdates are soluble in water. In solution molybdate ion is a corrosion-inhibitor and a powerful catalyst.

* £ c"i */ v̂L.*-"1 J ;*: - f-~ .o .^ '- -J SB J i , , , Mild reduction of soluble molyb­dates yields colloidal molybdenum blues of undetermined structure. Reduc­tion is highly photosensitive in presence of certain organic acids. Stronger reduction with Zn and Cd gives black insoluble deposits of Mo ( 0 H ) 3 .

p e r m o i y b d a l e s , T r e a t m e n t wi th H 2 0 2 g ives pe rmo lybda t e s R2Mo04+u where n is 1, 2, or 4 . Some are highly stable, others explosive.

f l i § o r v i o i y b d a t t v S . Reaction with H2S yields thiomolybdates R2MoS4

of striking color. Alkali, ammonium and alkaline earth salts are soluble, others mostly insoluble.

s. i> C: T o rr- **} > ; : * --V ;~V£. In HF solution molybdates give colorless, read­ily soluble fluoromolybdates such as R,Mo03F2 , R2Mo02F4, and R3Mo02F5.

h < 3 i ' c r o p O ? v rn o s y o £S S ? £* 3 - Complex molybdates of high molec­ular weight form in acid solution with nearly any element as thehetero ion. Acids such as H3PMo12O40 and H4SiMo12040 precipitate organic bases, but form heavy metal salts that are soluble both in water and many organic solvents.

O f o a i l i c c o m p l e x e s . Molybdates form soluble complexes with many hydroxy and dibasic acids and with polyhydric phenols.

Molybdates now available in commercial or experimental quantities include salts of Li, N a , K, Ag , Ca, Ba, Sr, Zn, Ce, Pb, N i , and Co . Write for our bulletins "Properties of Simple Molyb­dates'* and "Manufacturers of Molybdenum Chemicals." Climax Molybdenum Compuny, Dept. 22 , 5 0 0 5th Avenue, New York 36 , N. Y. MC5.i8

CLIMAX DEC. 19, 1955 C & E N 5 5 3 5

NIOUVBDENUM

MOLYBDATES