1830    J. G. Macvicar   iii. 475 		(heading)	  				Iron salts and minerals.
1906    J. A. LeClerc tr.  R. Robine  & M. Lenglen  vii. 193  				A solution..which when treated with an iron salt yielded Prussian blue.
1926    E. Mayer  viii. 160  				Metallic compounds, especially iron salts, act as photocatalyzers.
2012     		(Nexis)	 24 Jan. 4  				The soapy solution contains thousands of tiny bits of iron salts.