Ferrous sulfate heptahydrate

Solution of ferrous sulfate heptahydrate, 6.6 g, 24 mmol, and tartaric acid, 2g, 12 mmol, in deionized water, 20 mL... 

The scission reaction was carried out with a fixed addition of 1.50g of the dry resin, 10 mg of ferrous sulfate heptahydrate and 50 ml of 3% w/v hydrogen peroxide in a round Pyrex flask. The evolved carbon dioxide was vented to the atmosphere through serial traps containing sulfuric acid followed by a soda lime sorption tube. The magnetically stirred reaction flask was submerged in an oil bath heated with an immersed electrical coil and a magnetic stirrer positioned below the bath. The temperature was maintained at 50 +/- 1 C. After varied times 1.0 ml samples of liquid were withdrawn. There were fewer than six withdrawals in a given reaction sequence. 

Sodium nitrite, 99.99%, ferrous sulfate heptahydrate, sulfuric acid, sodium hydroxide, phosphorus pentoxide, and potassium hydroxide are reagent grade. 

Figure 2.37 illustrates the DTA and TGA traces for ferrous sulfate heptahydrate. Describe what processes are taking place. 

The polymerization proceeds in an autoclave, by dissolving vinyl acetate, polyfvinyl alcohol) (PVA), ferrous sulfate heptahydrate, and acetic acid in water. 

Small Quantities. Wear butyl rubber10 gloves, laboratory coat, and eye protection. Work in the fume hood. A solution of 4.7 g (0.05 mol) of phenol in 75 mL of water is prepared in a 200-mL, three-necked, round-bottom flask equipped with a stirrer, dropping funnel, and thermometer. Ferrous sulfate heptahydrate (2.35 g, 0.0085 mol) is dissolved in the mixture and the pH is adjusted to 5-6 with dilute sulfuric acid. Thirty-percent hydrogen peroxide (41 mL, 0.4 mol) is added dropwise while stirring over 1 hour. 

To a solution of ferrous sulfate heptahydrate in of hot water is added a solution of 2-(2-carboxy-4-chloro-6-nitrophenoxy)acetic acid and aqueous concentrated ammonia solution in water under stirring. After stirring, to the reaction mixture is twice added aqueous concentrated ammonia solution. While the reaction mixture becomes exothermic, stirring is continued. The resultant mixture is filtered through a celite layer under reduced pressure and washed with hot water twice. The filtrate is cooled and made acid with concentrated hydrochloric acid. The precipitated crystals are washed with water and dried to give 6-chloro-3,4-dihydro-3-oxo-2H-l,4-benzoxazine-8-carboxylic acid. 

About 70% of all iron oxide pigments are produced synthetically. Copperas or ferrous sulfate heptahydrate (FeS04-7H20) is the primary source of iron. It is a byproduct of the sulfate process for the manufacture of titanium dioxide as well as a by-product of pickling operations in the steel industry. Other sources of iron include ferric sulfate, ferrous chloride, ferric chloride, and the iron oxide slurry from the production of aniline by nitrobenzene reduction. 

When all the apparatus has been set up and tested the flask is connected to the reaction assembly, and 175 ml. of water, 105 g. (0.38 mole) of ferrous sulfate heptahydrate, 0.5 ml. of concentrated hydrochloric acid, and 6 g. (0.04 mole) of o-nitrobenzalde-hyde are introduced in the order given. The stirrer is then started, and the flask is heated by means of the steam bath. When the temperature of the mixture reaches 90°, 25 ml. of con-... 

The byproducts produced, dilute sulfuric acid (waste acid) and ferrous sulfate heptahydrate, if ilmenite is used, are to an increasing extent being processed further (see Fig. 5.9-2). In a process operated by Bayer AG since 1958, the... 

After prior dehydration to the monohydrate, ferrous sulfate heptahydrate is oxidatively roasted at temperatures above 650°C, producing clear red-colored a-Fe203 pigments (copperas reds) ... 

The composition of the fungal medium used for the transformation studies was, sucrose(1.50 gm), glucose(1.50 gm), polypeptone(0.50 gm), dipotassium hydrogen phosphate(0.10 gm), magnesium sulfate(Q.50 gm), potassium chloride(0.50 gm) and ferrous sulfate heptahydrate(0.001 gm) in 100 ml of distilled water. 

CrystaliroD. [Synergy Prod. Group] Ferrous sulfate heptahydrate crystalline form. 

Caswell No. 460 CCRIS 7331 ERA Pesticide Chemical Code 050502 Ferrous sulfate, heptahydrate Fesofbr Fesotyme Haemofort Iron protosulfate Iron sulfate heptahydrate lron(2- ) sulfate heptahydrate Iron(ll) sulfate heptahydrate Iron vitriol Ironate Irosul Melanterite mineral Presfersul Sal Martis Salt of steel Shoemaker s Black Siderotil mineral Sulfuric acid, iron(2+) salt (1 1), heptahydrate Szomolnikite mineral Tauriscite mineral. As a chemical intermediate, in electroplating, as a pesticide and medicinally as a hematinic. Registered by EPA as a herbicide (cancelled). Blue-green monoclinic crystals d n 1.897 loses H2O to form the tetrahydrate at 56.6", and the monohydrate at 65" soluble in H2O, insoluble in EtOH LDso (mus iv) n 65 mg/kg, (mus orl) = 1520 mg/kg. Generic Sigma-Aldrich Co. 

Ferrosoferric oxide. See Iron oxide black Ferric oxide Ferrous ferrite. See Iron oxide red Ferrous phosphide. See Di-iron phosphide Ferrous sulfate. See Ferrous sulfate heptahydrate... 

Ferrous sulfate-7-hydrate. See Ferrous sulfate heptahydrate Fiberglass Fibrous glass. See Glass... 

Green vitriol. See Ferrous sulfate heptahydrate Griffith s zinc white. See Lilhopone... 

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