Ferrous Sulfate Heptahydrate 250 grams

Ferrous Sulfate FeH14O11S aka Iron(II) sulfate heptahydrate cas#7782-63-0 Can be used to stain concrete and some limestones and sandstones a yellowish rust color. Woodworkers use ferrous sulfate solutions to color maple wood a silvery hue. Known as china blue, involved iron(II) sulfate. After printing an insoluble form of indigo onto the fabric, the indigo was reduced to leuco-indigo in a sequence of baths of ferrous sulfate . The china blue process could make sharp designs, but it could not produce the dark hues of other methods. may cause skin and eye irritation. If inhaled, it may also cause headaches, nausea, and respiratory irritations.