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7440-70-2

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Identification

Name
Calcium
CAS
7440-70-2
EINECS(EC#)
231-179-5
Molecular Formula
Ca
MDL Number
MFCD00085314
Molecular Weight
40.08
MOL File
7440-70-2.mol

Chemical Properties

Definition
Alkaline-earth element of atomic number 20, group IIA of the periodic table. Aw 40.08. Valence 2. Six stable isotopes.
Appearance
Calcium is a silvery-white metal when freshly cut, which tarnishes to a blue-gray color in air. It can also be found as a powder.
Appearance
softish silver-white metal
Melting point 
850 °C(lit.)

mp 
850 °C(lit.)

Boiling point 
1484 °C(lit.)

bp 
1484 °C(lit.)

density 
1.54 g/mL at 25 °C(lit.)

RTECS 
EV8040000
storage temp. 
water-free area
form 
pieces

color 
Silver-white
Stability:
Stable, but reacts with water to release hydrogen and produce calcium hydroxide. Incompatible with strong oxidizing agents, alcohols, moisture.
Water Solubility 
reacts with H2O, alcohols, dilute acids to evolve H2 [MER06]
Sensitive 
air sensitive, moisture sensitive
Merck 
13,1644
CAS DataBase Reference
7440-70-2(CAS DataBase Reference)

Hazard Information

Chemical Properties
Calcium is a silvery-white metal when freshly cut, which tarnishes to a blue-gray color in air. It can also be found as a powder.
Chemical Properties
softish silver-white metal
Uses
Reducing agent for production of less common metals; alloying agent to increase strength and corrosion resistance in lead, to improve mechanical and electrical properties in aluminum; refining agent to remove bismuth from lead. In metallurgy as scavenger to deoxidize, desulfurize and degas steel and cast iron; to control non-metallic inclusions in steel; to promote uniform microstructure in gray iron. As anode material in thermal batteries; as "getter" for oxygen and nitrogen.
General Description
A silvery, soft metal that turns grayish white on exposure to air. Used in metallurgy.
Reactivity Profile
Boron trifluoride reacts with incandescence when heated with alkali metals or alkaline earth metals except magnesium [Merck 11th ed. 1989]. Calcium reacts violently with acids [Lab. Govt. Chemist 1965]. Finely divided calcium burns spontaneously in chlorine at elevated temperatures [Mellor 3:637, 638, 651 1946-47]. Finely divided or massive calcium burns spontaneously in fluorine at ordinary temperatures. CALCIUM is incompatible with metal oxides, alkali metal hydroxides, chlorine fluorides, dinitrogen tetraoxide, and sulfur(with sulfur reacts explosively when ignited) [Bretherick, 5th Ed., 1995].
Air & Water Reactions
Pyrophoric ignites in air when finely divided, then burns with crimson flame [Merck 11th ed. 1989]. CALCIUM(7440-70-2) rapidly decomposes in water, the heat of reaction is sufficient that hydrolysis released hydrogen may ignite [Lab. Gov. Chemist 1966].
Hazard
Evolves hydrogen with moisture. Flammable in finely divided state. Fire and explosion hazard when heated or on contact with strong oxidizing agents.
Health Hazard
Contact with eyes or skin produces caustic burns.
Potential Exposure
Calcium is used as a raw material for aluminum, copper, and lead alloys.
Fire Hazard
Produce flammable gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Runoff may create fire or explosion hazard.
Incompatibilities
Forms hydrogen gas on contact with air; finely divided material or dust may ignite spontaneously. A strong reducing agent; reacts violently with water, acids, strong oxidizers (such as chlorine, bromine, and fluorine), alkaline carbonates, dinitrogen tetroxide; halogenated hydrocarbons; lead chloride, halogens, alkaline hydroxides, oxygen, silicon, sulfur, chlorine, fluorine, chlorine trifluoride, and many other substances. Reacts with water to produce flammable hydrogen gas
Purification Methods
Clean the metal by washing it with ether to remove adhering paraffin, file the surface in an argon-filled glove box, and wash it with ethanol containing 2% of conc HCl. Then wash it with dry ethanol, dry it in a vacuum and store it under pure argon [Addison et al. J Chem Soc 3868 1962].

Safety Data

Hazard Codes 
F
Risk Statements 
R15:Contact with water liberates extremely flammable gases.
Safety Statements 
S8:Keep container dry .
S24/25:Avoid contact with skin and eyes .
S43:In case of fire, use ... (indicate in the space the precise type of fire-fighting equipment. If water increases the risk add-Never use water) .
RIDADR 
UN 1401 4.3/PG 2

WGK Germany 
1

TSCA 
Yes
HazardClass 
4.3
PackingGroup 
II
HS Code 
28051200

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Material Safety Data Sheet(MSDS)

msds information
calcium(7440-70-2).msds

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