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ferrous chloride (FeCl2) is a greenish-white, crystalline solid that is soluble in water. It is noncombustible and is used in the sewage treatment industry, dyeing of fabrics, and as an iron coordination entity in organic synthesis reactions. It also serves as a reducing flocculating agent in waste water treatment, especially for wastewater containing chromates.
Inhalation of this substance can irritate the nose and throat. Ingestion of this substance can lead to vomiting and diarrhea. Prolonged skin contact may cause burns.
It has been reported that the subpial injection of ferric chloride in a rat sensorimotor cortex produces a series of symptomatic epileptic discharges arising from the ipsilateral amygdala, and that these episodes are associated with increased morbidity following traumatic brain injury. However, the validity of this model in predicting PTE remains to be established.
This reagent is the precursor to hydrated iron(III) oxides which are magnetic pigments. It can be generated by the action of hydrochloric acid on an excess of iron. It also forms in situ by the disproportionation of iron(II) chloride with sulphuric acid and is a common intermediate in the synthesis of complexing agents.
The naturally occurring mineral lawrencite is a brittle, heavy, soft, white odourless and tasteless halide mineral found in association with native mercury minerals, such as cinnabar and amalgams, at Moschellandsberg, Germany; Zimapan, Mexico; and Brewster County, Texas, U.S. It is also a component of the mineral laurentite, and occurs as the dihydrate in the meteorites hibbingite and rokuhnite.