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7440-50-8

Name Copper
CAS 7440-50-8
EINECS(EC#) 231-159-6
Molecular Formula Cu
MDL Number MFCD00239961
Molecular Weight 63.55
MOL File 7440-50-8.mol

Chemical Properties

Definition Metallic element of atomic number 29, group IB of the periodic table, aw 63.546, valences 1, 2; two stable isotopes.
Appearance Copper is a reddish-brown metal which occurs free or in ores, such as malachite, cuprite, and chalcopyrite.
Melting point  1083.4 °C (lit.)
Boiling point  2567 °C (lit.)
density  8.92
vapor pressure  0Pa at 20℃
Fp  -23 °C
storage temp.  2-8°C
solubility  slightly soluble in dilute acid solutions
form  wire
color  Rust-brownish
Specific Gravity 8.92
Stability: Stable. Incompatible with strong acids, active halogen compounds, chlorine, fluorine, iodine, bromine, ammonia. May react explosively with strong oxidizing agents.
Resistivity 1.673 μΩ-cm, 20°C
Water Solubility  insoluble
Sensitive  air sensitive
Merck  13,2545
Exposure limits TLV-TWA 1 mg(Cu)/m3 (dusts and mists) (ACGIH and MSHA); 0.2 mg/m3 (fumes) (ACGIH).
InChIKey RYGMFSIKBFXOCR-UHFFFAOYSA-N
History The discovery of copper dates from prehistoric times. It is said to have been mined for more than 5000 years. It is one of man’s most important metals. Copper is reddish colored, takes on a bright metallic luster, and is malleable, ductile, and a good conductor of heat and electricity (second only to silver in electrical conductivity). The electrical industry is one of the greatest users of copper. Copper occasionally occurs native, and is found in many minerals such as cuprite, malachite, azurite, chalcopyrite, and bornite. Large copper ore deposits are found in the U.S., Chile, Zambia, Zaire, Peru, and Canada. The most important copper ores are the sulfides, oxides, and carbonates. From these, copper is obtained by smelting, leaching, and by electrolysis. Its alloys, brass and bronze, long used, are still very important; all American coins are now copper alloys; monel and gun metals also contain copper. The most important compounds are the oxide and the sulfate, blue vitriol; the latter has wide use as an agricultural poison and as an algicide in water purification. Copper compounds such as Fehling’s solution are widely used in analytical chemistry in tests for sugar. High-purity copper (99.999 + %) is readily available commercially. The price of commercial copper has fluctuated widely. The price of copper in December 2001 was about $1.50/kg. Natural copper contains two isotopes. Twenty-six other radioactive isotopes and isomers are known.
Uses
Copper-based ingredients are often used as coloring agents in cosmetics. Copper itself is nontoxic, but soluble copper salts, notably copper sulfite, are skin irritants. In the body, copper combines with certain proteins to produce a variety of enzymes, which in turn serve as catalysts for different functions. For example, copper plays a role in the keratinization process. In normal skin, this catalytic action is completed in 8 to 12 hours, however more than three days may be required in cases of copper deficiency. Through such enzymatic activity, copper is involved in melanin production, as decreased pigmentation has been observed in cases of copper deficiency. Such enzyme-based action also links copper to maintaining and repairing the skin’s connective tissues (collagen and elastin), as well as to wound healing.
CAS DataBase Reference 7440-50-8(CAS DataBase Reference)
NIST Chemistry Reference Copper(7440-50-8)
EPA Substance Registry System 7440-50-8(EPA Substance)

Safety Data

Hazard Codes  F,N,Xi,Xn
Risk Statements 
R17:Spontaneously flammable in air.
R36/38:Irritating to eyes and skin .
R11:Highly Flammable.
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R67:Vapors may cause drowsiness and dizziness.
R65:Harmful: May cause lung damage if swallowed.
R62:Possible risk of impaired fertility.
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R48/20:Harmful: danger of serious damage to health by prolonged exposure through inhalation .
R38:Irritating to the skin.
Safety Statements 
S5:Keep contents under ... (appropriate liquid to be specified by the manufacturer) .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S16:Keep away from sources of ignition-No smoking .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S62:If swallowed, do not induce vomiting: seek medical advice immediately and show this container or label .
S36/37:Wear suitable protective clothing and gloves .
RIDADR  UN 3089 4.1/PG 2
WGK Germany  3
RTECS  GL5325000
10
TSCA  Yes
HazardClass  4.1
PackingGroup  III
HS Code  74081900
Safety Profile
Toxic by inhalation. Questionable carcinogen with experimental tumorigenic data. Experimental teratogenic and reproductive effects. Human systemic effects by ingestion: nausea and vomiting. See also COPPER COMPOUNDS. Liquid copper explodes on contact with water. Potentially explosive reaction with acetylenic compounds, 3-bromopropyne, ethylene oxide, lead azide, and ammonium nitrate. Iptes on contact with chlorine, chlorine trifluoride, fluorine (above 121℃), and hydrazinium nitrate (above 70'). Reacts violently with C2H2, bromates, chlorates, iodates, (Cl2 + OF2), dimethyl sulfoxide + trichloroacetic acid, ethylene oxide, H202, hydrazine mononitrate, hydrazoic acid, H2S + air, Pb(N3)2, K2O2, NaN3, Na2O2, sulfuric acid. Incandescent reaction with potassium dioxide. Incompatible with 1 -bromo-2 propyne.
Hazardous Substances Data 7440-50-8(Hazardous Substances Data)
Toxicity
LD50 intraperitoneal in mouse: 3500ug/kg
IDLA 100 mg Cu/m3

Hazard Information

Material Safety Data Sheet(MSDS)

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