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7705-08-0

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Identification

Name
Ferric chloride
CAS
7705-08-0
Synonyms
BOD IRON(III) CHLORIDE SOLUTION D
FERRIC CHLORIDE
FERRIC CHLORIDE CS
FERRIC CHLORIDE OXIDIZING
FERRIC CHLORIDE REAGENT
FERRIC CHLORIDE SOLUTION
FERRIC CHLORIDE SOLUTION R1
FERRIC PERCHLORIDE
FERRIC TRICHLORIDE
Ferric trichloride,solution
IRON(+3)CHLORIDE
IRON ATOMIC SPECTROSCOPY STANDARD
IRON CHLORIDE
IRON(III) CHLORIDE
IRON (III) CHLORIDE ON SILICA
IRON TRICHLORIDE
TDA REAGENT
TRYPTOPHAN DEAMINASE REAGENT
Chlorure perrique
chlorureferrique
EINECS(EC#)
231-729-4
Molecular Formula
Cl3Fe
MDL Number
MFCD00011005
Molecular Weight
162.2
MOL File
7705-08-0.mol

Chemical Properties

Appearance
black crystalline powder
Appearance
Ferric Chloride is a black-brown, dark-green, or black crystalline solid.
mp 
304 °C(lit.)

bp 
316 °C
density 
2,804 g/cm3
vapor density 
5.61 (vs air)

vapor pressure 
1 mm Hg ( 194 °C)

Fp 
316°C
storage temp. 
2-8°C
solubility 
H2O: soluble

form 
powder

Stability:
Stable. Very sensitive to moisture. Incompatible with strong oxidizing agents; forms explosive mixtures with sodium, potassium. Hygroscopic.
Water Solubility 
920 g/L (20 ºC)
Sensitive 
Hygroscopic
Merck 
14,4019
Uses
Treatment of sewage and industrial wastes; etching agent for engraving, photography, and printed circuitry; condensation catalyst in FriedelCrafts reactions; mordant; oxidizing, chlorinating, and condensing agent; disinfectant; pigment; feed additive; wat
Uses
Ferric Chloride is a nutrient and dietary supplement that serves as a source of iron.
CAS DataBase Reference
7705-08-0(CAS DataBase Reference)
NIST Chemistry Reference
Ferric chloride(7705-08-0)
EPA Substance Registry System
7705-08-0(EPA Substance)

Safety Data

Hazard Codes 
C,Xn,Xi
Risk Statements 
R41:Risk of serious damage to eyes.
R38:Irritating to the skin.
R22:Harmful if swallowed.
R34:Causes burns.
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S39:Wear eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
RIDADR 
UN 2582 8/PG 3

WGK Germany 
1

RTECS 
LJ9100000

HazardClass 
8
PackingGroup 
III
HS Code 
28273990
Safety Profile
Poison by ingestion and intravenous routes. Experimental reproductive effects. Corrosive. Probably an eye, skin, and mucous membrane irritant. Mutation data reported. Reacts with water to produce toxic and corrosive fumes. Catalyzes potentially explosive polymerization of ethylene oxide, chlorine + monomers (e.g., styrene). Forms shock sensitive explosive mixtures with some metals (e.g., potassium, sodium). Violent reaction with all$ chloride. When heated to decomposition it emits highly toxic fumes of HCl.
Hazardous Substances Data
7705-08-0(Hazardous Substances Data)

Raw materials And Preparation Products

Hazard Information

General Description
FERRIC CHLORIDE(7705-08-0) is an orange to brown-black solid. FERRIC CHLORIDE(7705-08-0) is slightly soluble in water. FERRIC CHLORIDE(7705-08-0) is noncombustible. When wet FERRIC CHLORIDE(7705-08-0) is corrosive to aluminum and most metals. Pick up and remove spilled solid before adding water. FERRIC CHLORIDE(7705-08-0) is used to treat sewage, industrial waste, to purify water, as an etching agent for engraving circuit boards, and in the manufacture of other chemicals.
Reactivity Profile
Alkali metal hydroxides, acids, anhydrous chlorides of iron, tin, and aluminum, pure oxides of iron and aluminum, and metallic potassium are some of the catalysts that may cause ethylene oxide to rearrange and polymerize, liberating heat, [J. Soc. Chem. Ind. 68:179(1949)]. Explosions occur , although infrequently, from the combination of ethylene oxide and alcohols or mercaptans, [Chem. Eng. News 20:1318(1942)]. Allyl chloride may polymerize violently under conditions involving an acid catalyst, such as sulfuric acid, ferric chloride, aluminum chloride, Lewis acids, and Ziegler type catalysts (initiators), [Ventrone (1971)].
Air & Water Reactions
Very hygroscopic. Slightly water soluble, where a 0.1M solution has a pH of 2.0.
Hazard
Toxic by ingestion, strong irritant to skin and tissue.
Health Hazard
Inhalation of dust may irritate nose and throat. Ingestion causes irritation of mouth and stomach. Dust irritates eyes. Prolonged contact with skin causes irritation and burns.
Potential Exposure
Iron chloride is used to treat sewage and industrial waste. It is also used as an etchant for photo engraving and rotogravure; in textiles; photography; as a disinfectant; as a feed additive.
First aid
Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respira tion with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with run ning water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin. Keep victim warm and quiet. Effects of exposure (inhalation, ingestion or skin contact) to substance may be delayed. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves.

Fire Hazard
Special Hazards of Combustion Products: Irritating hydrogen chloride fumes may form in fire.
Shipping
UN1773 Ferric chloride, anhydrous, Hazard class: 8; Labels: 8-Corrosive material. UN2582 Ferric chlo ride, solution, Hazard class: 8; Labels: 8-Corrosive material
Incompatibilities
Aqueous solutions are a strong acid. Violent reaction with bases, allyl chloride; sulfuric acid; water. Shock- and friction-sensitive explosive material forms with potassium, sodium and other active metals. Attacks metals when wet.
Waste Disposal
Neutralize with lime or soda ash and bury in an approved landfill.

Material Safety Data Sheet(MSDS)

Questions And Answer

Physical properties
Ferric chloride, solution appears as a colorless to light brown aqueous solution that has a faint hydrochloric acid odor. Highly corrosive to most metals and probably corrosive to tissue. Noncombustible. Used in sewage treatment and water purification.

Ferric Chloride solution
Ferric chloride is an dark brown hexagonal crystals; hygroscopic; density 2.898g/cm3; melts at 306°C; decomposes at 315°C; highly soluble in water (74.4g/100g water at 0°C); very soluble in alcohol, ether and acetone. The hexahydrate is brownish-yellow crystalline mass; deliquesces; melts at 37°C; vaporizes around 280°C; highly soluble in water (92g/100g water at 20°C); very soluble in organic solvents such as ethanol, ether and acetone.
Uses
Iron(III) chloride occurs naturally as the mineral molysite. The compound is widely used to prepare a number of iron(III) salts. Also, it is applied in sewage and industrial waste treatment processes. It also is used in the manufacture of dyes, pigments and inks; as a chlorinating agent; and as a catalyst in chlorination reactions of aromatics.
Ferric chloride reactions
In the laboratory, anhydrous Ferric chloride(FeCl3)can be used as an alternative to anhydrous AlCl3 in Friedel-Crafts reactions, like the alkylation or acylation of aromatic rings. Being a small, highly charged metal, it polarises reagents like halogenoalkanes (alkyl halides), which generates carbocations (carbenium ions) that then attack benzene rings, as in the synthesis here.
Production Methods
Iron(III) chloride forms passing chlorine gas over iron filings at 350°C:
2Fe + 3Cl2 → 2FeCl3
It also forms heating iron(III) oxide with HCl at elevated temperatures:
Fe2O3 + 6HCl → 2FeCl3 + 3H2O
The product may be sublimed in a stream of chlorine to give high purity grade iron(III) chloride.
The anhydrous chloride also may be made by heating the hexahydrate, FeCl3•6H2O, with thionyl chloride:
FeCl3•6H2O + 6SOCl2 → FeCl3 + 12HCl + SO2
Application
The following list represents some of the most common and largest applications of Ferric Chloride:
As a purifying agent in water supply and as a coagulant in municipal and industrial wastewater treatment. In this application, Ferric chloride’s rapid hydrolysis in water makes it an ideal flocculating and precipitating agent. The ferric hydroxide (Fe[OH]3) produced forms flocs (small clumps or tufts) that adsorb suspended particles of various materials (e.g., colloids, clays and bacteria). The clumps, with the adsorbed matter, are then allowed to settle for easy removal. Ferric chloride forms precipitates with hydrogen sulfide (H2S), phosphate (PO4), arsenic as arsenate (AsO4) and hydroxide alkalinity (OH).
As an oxidant in indigo blue dyestuff production.
As an etching medium in producing printed circuit boards (PCBs).
As a catalyst for the reaction of ethylene with chlorine, forming ethylene dichloride (1,2-dichloroethane), an important commodity chemical, which is mainly used for the industrial production of vinyl chloride, the monomer for making PVC.
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