7720-78-7 Usage
Description
Ferrous sulfate, also known as iron sulfate or iron vitriol, is a greenish or yellowish solid in fine or lumpy crystals. It is a white to grayish odorless powder and is a nutrient and dietary supplement that is a source of iron. Ferrous sulfate heptahydrate contains approximately 20% iron, while ferrous sulfate dried contains approximately 32% iron. It is soluble in water and has high bioavailability.
Uses
Used in Nutritional Supplements:
Ferrous sulfate is used as an iron enhancer in the fortification of baking mixes, infant foods, cereals, and pasta products. It is also used as an iron supplement for anti-anemia drugs.
Used in Agriculture:
Ferrous sulfate heptahydrate, also known as green vitriol or copperas, is an iron salt fertilizer effective in overcoming iron deficiency.
Used in Food Industry:
Ferrous sulfate is used as a color former of fruit and vegetable, such as in the formulation of long eggplant, sugar boiled beans, and kelp. It can also be used for sterilization, deodorization, and as a very weak bactericide.
Used in Chemical Production:
Ferrous sulfate is used in the production of various chemicals, such as sulfur dioxide and sulfuric acid.
Used in Manufacturing:
It is used in the manufacturing of iron salt, iron oxide pigments, mordant, purifying agent, preservatives, and disinfectants.
Used in Water Purification:
Ferrous sulfate is used as a mordant in dyeing, a component of writing ink, in electroplating baths, in radiation dosimeters, in lithography and engraving, as a weed-killer, and in water purification.
Used in Analytical Reagent:
Ferrous sulfate is used as a reducing agent and an analytical reagent in the brown ring test for nitrate.
Toxicity
LD50: 279 to 558 mg/kg (rat, oral, calculated as Fe).
GRAS (FDA, § 182.5315, §184.1315, 2000);
ADI 0.8 mg Fe/kg (calculated in terms of Fe; FAO/WHO, 2001);
Hazards & Safety Information
Category :Toxic substances
Toxicity classification: highly toxic
Acute Toxicity : Oral-Rat LD50 319 mg/kg; Oral-mouse LD50: 680 mg/kg
Flammability and Hazardous characteristics: Non-combustible with fire producing toxic iron-containing fumes
Storage and transportation characteristics? Treasury: low temperature, ventilated, dry; store separately from food raw materials.
Fire extinguishing agent : water, carbon dioxide, dry powder, sand
Occupational Standard? :TWA 1 mg (iron)/m3
Production Methods
Iron(II) sulfate in industrial scale is mostly produced in the pickling process as a by-product of the steel industry. It is obtained when the surface of steel is cleaned with dilute sulfuric acid to remove metal impurities. In the laboratory iron(II) sulfate heptahydrate may be prepared by dissolving iron in dilute sulfuric acid in a reducing atmosphere, followed by crystallization: Fe + H2SO4 → FeSO4 + H2 Alcohol may be added to the aqueous solution to speed up crystallization; iron(II) may otherwise oxidize to iron(III) during a slow crystallization process. Iron(II) oxide or carbonate may be used instead of iron metal to prepare the heptahydrate..
Hazard
Ingestion causes intestinal disorders.
Flammability and Explosibility
Nonflammable
Safety Profile
A human poison by
ingestion. Moderately toxic to humans by an
unspecified route. An experimental poison
by ingestion, intraduodenal, intraperitoneal,
intravenous, and subcutaneous routes.
Human systemic effects by ingestion:
aggression, somnolence, brain recorlng
changes, diarrhea, nausea or vomiting,
bleedmg from the stomach, coma.
Questionable carcinogen with experimental
tumorigenic data. Experimental teratogenic
and reproductive effects. Mutation data
reported. Potentially explosive reaction with
methyl isocyanoacetate at 25'. May igmte on
contact with arsenic trioxide + sodium
nitrate. When heated to decomposition it
emits toxic fumes of SOx. See also IRON COMPOUNDS.
Potential Exposure
It is used as a fertilizer, food or feed
additive; and in herbicides; process engraving; dyeing, and
water treatment. A byproduct of various chemical and
metal treating operations.
Veterinary Drugs and Treatments
While iron is a necessary trace element in all hemoglobin-utilizing
animals, the use of therapeutic dosages of ferrous sulfate (or other
oral iron) preparations in veterinary medicine is limited primarily
to the treatment of iron-deficiency anemias in dogs (usually due to
chronic blood loss), and as adjunctive therapy in cats when receiving
epoetin (erythropoietin) therapy. Injectable iron products are
usually used in the treatment of iron deficiency anemias associated
with newborn animals.
Metabolism
Following absorption, the majority of iron is bound to
transferrin and transported to the bone marrow where
it is incorporated into haemoglobin. The remainder is
stored within ferritin or haemosiderin or is incorporated
into myoglobin with smaller amounts occurring in haemcontaining enzymes or in plasma bound to transferrin. Only very small amounts are excreted as the body
reabsorbs the iron after the haemoglobin has broken
down
Incompatibilities
Aqueous solution is acidic. Contact with
alkalies form iron. Keep away from alkalies, soluble carbo nates; gold and silver salts; lead acetate; lime water, potassium
iodide; potassium and sodium tartrate; sodium borate; tannin.
Check Digit Verification of cas no
The CAS Registry Mumber 7720-78-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,2 and 0 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 7720-78:
(6*7)+(5*7)+(4*2)+(3*0)+(2*7)+(1*8)=107
107 % 10 = 7
So 7720-78-7 is a valid CAS Registry Number.
InChI:InChI=1/Fe.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/p-2
