The fermented extract is combined with the ferrous sulfate and a binder such as gum arabic. Ferrous sulfate heptahydrate is generally the starting-point in the preparation of iron pigments. When pure, it forms fine sea-green crystals, with an astringent metallic taste, which are not poisonous and are easily soluble in water.
After long exposure to the air, ferrous sulfate becomes covered with an ocher-colored crust, consisting of basic ferric sulfate. The ferrous oxide contained in the green vitriol has united with oxygen and been converted into ferric oxide. The latter requires a larger quantity of acid than ferrous oxide for the formation of soluble salts so that an insoluble basic salt is separated. The same thing occurs when a solution of ferrous sulfate is exposed to the air. When green vitriol, or any other ferrous salt, is exposed to the action of oxidizing agents, such as chlorine or nitric acid, the iron is rapidly changed into the ferric state.
This transformation is of particular importance in the manufacture of certain blue pigments. It also finds use in dyeing as a mordant. Two different methods for the direct application of indigo dye were developed in England in the 18th century and remained in use well into the 19th century. One of these, 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 with reoxidation to indigo in the air between immersions.
The china blue process could make sharp designs, but it could not produce the dark hues of other methods. Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect against physical damage.
Fluctuating temperatures causes product oxidation. Do not use this product if coated with brownish-yellow basic ferric sulfate. Geochemical simulation of the stabilization process of vanadium-contaminated soil remediated with calcium oxide and ferrous sulfate. Effects of ferric sulfate and polyaluminum chloride coagulation enhanced treatment wetlands on Typha growth, soil and water chemistry.
Surface-active bismuth ferrite as superior peroxymonosulfate activator for aqueous sulfamethoxazole removal: Performance, mechanism and quantification of sulfate radical. Skip to main content. Materials by Element. Materials by Form. All Nanomaterials Quantum Dots. Materials by Application. Life Science Chemicals. About Us. Share This Page. Email Tweet Facebook. View the history of American Elements on Wikipedia. Iron II Sulfate. CAS : Linear Formula: FeSO 4.
Density 1. About Ferrous Sulfate Ferrous Sulfate is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. Iron helps blood to carry oxygen through the human body. Ferrous sulfate was used in the manufacture of inks, most notably iron gall ink, which was used during the Middle Ages until the end of the eighteenth century. Chemical tests made on the Lachish letters c.
Moreover, it is thought that oak galls and copperas may have been used in making the ink on those letters. Ferrous sulfate also finds use in wool dyeing as a mordant.
Furthermore, harewood, a material used in marquetry and parquetry since the 17th century, is also made using ferrous sulfate. Two different methods for the direct application of indigo dye were developed in England in the eighteenth century and remained in use well into the nineteenth century. For instance, one of these, 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 with reoxidation to indigo in air between immersions.
The china blue process could make sharp designs, but it could not produce the dark hues of other methods 1. Ferrous sulfate is still used today, for example, as a colorant in foods and fabric dyes. It is mixed with 9 :. In horticulture it is used for treating iron chlorosis, a yellowing of plant leaves caused by iron deficiency. Although not as rapid-acting as ferric EDTA, its effects are longer-lasting. Gardeners and farmers mix it with compost and dig it into the soil to create a store which can last for years.
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