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7782-63-0

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Identification

Name
Ferrous sulfate heptahydrate
CAS
7782-63-0
Synonyms
1,10-PHENANTHROLINE FERROUS COMPLEX
1,10-PHENANTHROLINE FERROUS SULFATE
1,10-PHENANTHROLINE FERROUS SULPHATE COMPLEX
1,10-PHENANTHROLINE IRON(II) SALT
1,10-PHENANTHROLINE IRON (II) SULFATE
1,10-PHENANTHROLINE IRON(I) SULFATE COMPLEX
FERROIN
FERROIN INDICATOR
FERROIN INDICATOR SOLUTION
M/40-FERROIN
O-PHENANTHROLINE FERROUS SULFATE
O-PHENANTHROLINE FERROUS SULFATE COMPLEX
PHENANTHROLINE FERROUS SULFATE
(TRIS)-1,10-PHENANTHROLINE IRON (II) SULFATE
Fesofor
Greenvitrol
Haemofort
Iron(II)sulfate(1:1),heptahydrate
Ironate
Ironvitrol
EINECS(EC#)
238-676-6
Molecular Formula
FeH14O11S
MDL Number
MFCD00036428
Molecular Weight
278.01
MOL File
7782-63-0.mol

Chemical Properties

Appearance
Ferrous sulfate is a greenish or yellowish solid in fine or lumpy crystals.
Appearance
light blue or light blue-green solid
Melting point 
64 °C
mp 
64 °C
density 
1.897 g/mL at 25 °C
vapor pressure 
14.6 mm Hg ( 25 °C)

storage temp. 
2-8°C

solubility 
25.6 g/100 mL (20°C)
form 
Solution
color 
Slightly greenish to blue
Specific Gravity
1.898
PH
3.0-4.0 (25℃, 50mg/mL in H2O)
Stability:
Stable. Substances to be avoided include strong oxidizing agents. Air and moisture sensitive.
Water Solubility 
25.6 g/100 mL (20 ºC)
Sensitive 
Air Sensitive & Hygroscopic
Merck 
14,4057
InChIKey
SURQXAFEQWPFPV-UHFFFAOYSA-L
CAS DataBase Reference
7782-63-0(CAS DataBase Reference)
EPA Substance Registry System
7782-63-0(EPA Substance)

Safety Data

Hazard Codes 
Xn,Xi
Risk Statements 
R22:Harmful if swallowed.
Safety Statements 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
RIDADR 

WGK Germany 
1
RTECS 
NO8510000


10-23
TSCA 
Yes
HS Code 
28332950
Safety Profile
Poison by intravenous, intraperitoneal, and subcutaneous routes. Moderately toxic by ingestion and rectal routes. Mutation data reported. When heated to decomposition it emits toxic fumes of SOx.
Toxicity
LD50 in mice: 65 mg/kg i.v.; 1.52 g/kg orally (Hoppe)

Raw materials And Preparation Products

Hazard Information

General Description
A greenish or yellow-brown crystalline solid. Density 15.0 lb /gal. Melts at 64°C and loses the seven waters of hydration at 90°C. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Used for water or sewage treatment, as a fertilizer ingredient.
Reactivity Profile
FERROUS SULFATE(7782-63-0) is a weak reducing agent.
Air & Water Reactions
Water soluble
Health Hazard
INGESTION: abdominal pain, retching, diarrhea, dehydration, shock, pallor, cyanosis, rapid or weak pulse, shallow respiration, low blood pressure.
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.
First aid
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immedi ately with soap and water. Seek medical attention immedi ately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precau tions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quanti ties of water and induce vomiting. Do not make an uncon scious person vomit.

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.
Description
§184.1315(a) Ferrous sulfate heptahydrate (iron (II) sulfate heptahydrate, FeS04-7H2O) is prepared by the action of sulfuric acid on iron. It occurs as pale, blueish-green crystals or granules. Progressive heating of ferrous sulfate heptahydrate produces ferrous sulfate (dried). Ferrous sulfate (dried) consists primarily of ferrous sulfate monohydrate (CAS No. 17375-41-6) with varying amounts of ferrous sulfate tetrahydrate (CAS No. 20908-72-9) and occurs as a grayish-white to buff-colored powder.
Uses
In manufacture of Fe, Fe Compounds, other sulfates; in Fe electroplating baths; in fertilizer; as food and feed supplement; in radiation dosimeters; as reducing agent in chemical processes; as wood preservative; as weed-killer; in prevention of chlorosis in plants; in other pesticides; in writing ink; in process engraving and lithography; as dye for leather; in etching aluminum; in water treatment; in qualitative analysis ("brown ring" test for nitrates); as polymerization catalyst.
Uses
Used in quantitative analysis of nitrates .
Definition
ChEBI: A hydrate that is the heptahydrate form of iron(2+) sulfate. It is used as a source of iron in the treatment of iron-deficiency anaemia (generally in liquid-dosage treatments; for solid-dosage treatments, the monohydrate is normally used).
Purification Methods
Crystallise the sulfate from 0.4M H2SO4, or precipitate it from an aqueous solution with EtOH. It is efflorescent in dry air, and is converted to the tetrahydrate at 57o, then to the monohydrate at 65o (or by heating the heptahydrate in a vacuum at 140o). It forms a brown-black complex, FeSO4.NO, with nitric oxide and is used in a qualitative test for nitrates (“brown ring” test).

Material Safety Data Sheet(MSDS)

Questions And Answer

Solubility in water (g/100mL)
Dissolved grams in 100 mL water at different temperatures (°C):
28.8g/0℃: 40g/10℃;48g/20℃;60g/30℃;73.3g/40℃
101g/60℃: 79.9g/70℃;68.3g/80℃;57.8g/90℃
Chemical properties
Blue-green crystals (monoclinic system) or granules, odorless. Soluble in water, slightly soluble in alcohol, soluble in anhydrous methanol.
Applications
As analytical reagent; as raw material for ferrite; raw material to produce magnetic iron oxide, iron(III) oxide and iron blue inorganic pigment, iron catalyst and poly iron sulfate; as chromatographic reagent. In agriculture, it is used as pesticide in agriculture to control wheat smut, scab of apple and bear, fruit tree decay; as fertilizer to remove moss and lichen of food trunk. Medically it is used as local astringent, blood tonic and anti-anemia.  Ferrous sulfate heptahydrate (feed grade) can be used as the iron fortifier for feed additive. Ferrous sulfate heptahydrate (food grade) is used as nutrition supplements, such as iron fortifier, coloring agent for fruit and vegetable. According to Chinese regulation, it can be used in following foods and with allowed amounts:
Sweets with filling and salt: 3000~6000 mg/kg;
Cereals with high iron content and corresponding products (maximum daily consumption 50g): 860~960 mg/kg;
Dairy and infant foods: 300-500 mg/kg;
Cereals and corresponding products: 120~140 mg/kg;
Beverages: 50~100 mg/kg. It is used to produce iron salt, iron oxide pigment, mordant, water purifier, preservatives, disinfectant, etc.
Preparation
  • By-product Method: byproduct of titanium dioxide production:
Titanite is decomposed with sulfuric acid to obtain titanium dioxide, ferrous sulfate(II) and ferric sulfate (III). Iron (III) compounds are reduced to obtain iron (II) compounds. The mixture is then cooled and crystallized to form ferrous sulfate.
5H2SO4+2FeTiO3→2FeSO4+TiOS04+Ti(SO4)2+5H2O
  • Sulfuric acid method
Scrap iron is dissolved with a mixture of diluted sulfuric acid solution and mother solution. The reaction temperature should be below 80°C, otherwise, it results in the sedimentation of ferrous sulfate monohydrate. Clarification is applied to remove impurities from the slightly acidic ferrous sulfate solution. Cooling and centrifugation are carried out obtain light-green ferrous sulfate.
Fe+H2SO4→FeSO4+H2↑
Category
Toxic substance
Toxicity Grading
Middle toxic
Acute Toxicity
Oral-rat LD50: 1389 mg/kg; oral-mouse LD50: 1520 mg/kg.
Flammability Hazardous Characteristics
Not flammable, change into ferric oxide smoke at high temperature.
Storage and Transport
Stored in well-ventilated area, low temperature and dry.
Extinguishing Agent
Water, carbon dioxide, dry powder, sand.

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