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It is used as a reducing agent in metallurgy, in pharmaceutical preparations, as a mordant in dyeing and in sewage treatment. Ferrous chloride has a kind of niche application. During the laboratory synthesis of iron complexes, ferrous chloride acts as a reducing flocculating agent in wastewater treatment, particularly for wastes containing chromate. It is the precursor to hydrated iron(III) oxides that are magnetic pigments. Ferrous chloride is employed as a reducing agent in many organic synthesis reactions.
Baldwin, D. A.; Lever, A. B. P.; Parish, R. V. Complexes of 2,2'-azopyridine with iron(II), cobalt(II), nickel(II), copper(I), and copper(II). Infrared study. Inorg. Chem. 1969, 8 (1), 107-115.
Oliveira-Silva, R.; João Pinto, C.; Rui, V.; Daniel-da-Silva, A. L. Magnetic chelating nanoprobes for enrichment and selective recovery of metalloproteases from human saliva. J. Mater. Chem. B 2015, 3, 238-249.
Hazard Statements: H302-H314-H318
Harmful if swallowed. Causes severe skin burns and eye damage. Causes serious eye damage.
Precautionary Statements: P260u-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501a
IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.