| Identification | More | [Name]
Calcium | [CAS]
7440-70-2 | [Synonyms]
cium
Praval
NA 1401
Calcicat
calcium(0)
Calcium shot
Calcium atom
CALCIUM METAL
Calcium, 99.5%
LOWCALCIUMDIET
Vivinal MCA 26
Atomic calcium
Calcium element
M BROTH 20X10ML
Calciumshavings
Calcium turnings
CalciumturningsN
Calcium solution
HIGH-CALCIUMDIET
calcium，metallic
Calcium granules
Calciumshot(99%)
CALCIUM STANDARD
CALCIUM GRANULAR
Calcium USP/EP/BP
CalciumshotNmmdia
HARDNESS STANDARD
SULFITE (IN HSO3-)
CALCIUM CORED WIRE
CALCIUMCARBASALATE
CalciuM shot,1-5MM.
CALCIUM AA STANDARD
CALCIUM IC STANDARD
Calciumgranulesmesh
Calcium, Redistilled
Calcium alloys,pyrop
Calcium,99%,turnings
Calcium,99%,granular
CALCIUM ICP STANDARD
CALCIUM TURNINGS, 2N
Calciumturnings(99%)
Calcium, turning, 98%+
Calciumgranules(99.5%)
CALCIUM GRANULAR 100 G
CALCIUM GRANULAR 500 G
CALCIUM TURNINGS 99%
Calcium shot, ≤1cm, 99%
CALCIUM MATRIX MODIFIER
CALCIUM 1,000 MICROG/ML
Calcium, turnings,99.5%
Calcium, crystals,99.99%
CALCIUM ICP/DCP STANDARD
calciumalloys,pyrophoric
CALCIUM, DREHSPAENE, 99%
Calcium, shavings, 99.6%
CALCIUM, STUECKE 1CM, 99%
Calcium granules, -9 mesh
Calcium solution 1000 ppm
HARDNESS STANDARD REAGENT
CALCIUM STANDARD SOLUTION
CALCIUM STANDARD STOCK SOL
Calcium pieces, <1 cm, 99%
ALUMINIUM 1,000PPM FOR ICP
calcium metal,crystalline
Calcium solution 10 000 ppm
ALUMINIUM 10,000PPM FOR ICP
Blood-coagulation factor IV
CALCIUM GRANULES, CA 0.8-6MM
CALCIUM, ANALYTICAL STANDARD
CALCIUM, AAS STANDARD SOLUTION
Calciumgranules,ca0.8-6mm,98+%
CALCIUMMETAL,TURNINGS,PURIFIED
CALCIUM SINGLE ELEMENT STANDARD
Calcium,granular,ca0.8-6mm,98+%
CalciuM Metal, Pieces, Purified
Calcium granules, &ap:0.8 to 6mm
CALCIUM METALLO-ORGANIC STANDARD
CALCIUM PLASMA EMISSION STANDARD
CALCIUM STANDARD SOLUTION 100 ML
CALCIUM STANDARD SOLUTION 500 ML
Calcium ingot, 97% (metals basis)
CALCIUM, PLASMA STANDARD SOLUTION
CALCIUM, DENDRITIC PIECES, 99.99%
CALCIUM SINGLE COMPONENT STANDARD
CALCIUM AA SINGLE ELEMENT STANDARD
CALCIUM ATOMIC ABSORPTION STANDARD
Calciumshot,1cm(0.4in)anddown,99%,
CALCIUM, GRANULES, CA. 6 MESH, 99%
CALCIUM, OIL BASED STANDARD SOLUTION
Calcium crystalline dendritic pieces
CALCIUM ATOMIC SPECTROSCOPY STANDARD
Calcium ingot, 97% trace metals basis
Calcium,crystalline,dendritic(99.99%)
CALCIUM SINGLE ELEMENT PLASMA STANDARD
CALCIUM, ORGANIC AAS STANDARD SOLUTION
CALCIUM, DISTILLED, DENDRITIC PIECES, 9&
CALCIUM ICP STANDARD TRACEABLE TO SRM FR
CALCIUM AA/ICP CALIBRATION/CHECK STANDARD
CALCIUM, DISTILLED, DENDRITIC PIECES, 99 .5%
CALCIUM PLASMA EMISSION SPECTROSCOPY STANDARD
Calcium granules, -9 mesh, 98.8% (metals basis)
Calcium plasma standard solution, Ca 10000μg/mL
Calcium Oil based standard solution, Ca 1000μg/g
Calcium, Reference Standard Solution, 1000ppm ±1%
Calcium, Oil based standard solution, Ca 5000μg/g
Calcium standard solution, 1 mg/ml Ca in 0.5N HNO3
Standard solution for the determination of calcium
CALCIUM GRANULATED, PARTICLE SIZE APPROX . 0,2-3 MM
CalciumcrystallinedendriticsolidNampouledunderargon
Calcium shot, 1cm (0.4in) & down, 99% (metals basis)
Calcium, AAS standard solution, Specpure(R), Ca 1000μg/ml
Calcium shot, redistilled, ≤1cm, 99.5% trace metals basis
Calciumshot,redistilled,1cm(0.4in)&down,99.5%(metalsbasis)
Calcium, plasma standard solution, Specpure(R), Ca 1000μg/ml
Calcium, plasma standard solution, Specpure(R), Ca 10,000μg/ml
Calcium, Oil based standard solution, Specpure(R), Ca 5000μg/g
Calcium, Oil based standard solution, Specpure(R), Ca 1000μg/g
Calcium, Organic AAS standard solution, Specpure|r, Ca 1000^mg/g
Calcium dendritic pieces, purified by distillation, 99.5% trace metals basis
CalciuM dendritic pieces, purified by distillation, 99.99% trace Metals basis
Calcium crystalline dendritic pieces, ampuled under argon, 99.99% trace metals basis | [EINECS(EC#)]
231-179-5 | [Molecular Formula]
Ca | [MDL Number]
MFCD00085314 | [Molecular Weight]
40.08 | [MOL File]
7440-70-2.mol |
| Chemical Properties | Back Directory | [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. | [Melting point ]
850 °C(lit.)
| [Boiling point ]
1484 °C(lit.)
| [density ]
1.54 g/mL at 25 °C(lit.)
| [RTECS ]
EV8040000 | [storage temp. ]
water-free area | [solubility ]
reacts with H2O; insoluble in benzene | [form ]
pieces
| [color ]
Silver-white | [Specific Gravity]
1.54 | [Odor]
Odorless | [Stability:]
Stable, but reacts with water to release hydrogen and produce calcium hydroxide. Incompatible with strong oxidizing agents, alcohols, moisture. | [Resistivity]
3.5 μΩ-cm, 20°C | [Water Solubility ]
reacts with H2O, alcohols, dilute acids to evolve H2 [MER06] | [Sensitive ]
air sensitive, moisture sensitive | [Merck ]
13,1644 | [BRN ]
4241647 | [CAS DataBase Reference]
7440-70-2(CAS DataBase Reference) | [EPA Substance Registry System]
Calcium (7440-70-2) |
| Hazard Information | Back Directory | [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 | [Description]
Calcium is a silvery-white metal when freshlycut, which tarnishes to a blue-gray color in air. It can alsobe found as a powder. Molecular weight=40.1; Specificgravity (H2O:1)=1.54; Boiling point=1485℃; Freezing/Melting point=849℃. Hazard Identification (based onNFPA-704 M Rating System): Health 3, Flammability 1,Reactivity 2. Reacts with water. | [Physical properties]
Bright, silvery-white metal; face-centered cubic crystal structure (α = 0.5582 nm) at ordinary temperatures, transforming to body-centered cubic form (α = 0.4407) at 430°C; density 1.54 g/cm3 at 20°C; hardness 2 Mohs, 17 Brinnel (500 kg load); melts at 851°C; vaporizes at 1,482°C; electrical resistivity 3.43 and 4.60 microhm-cm at 0° and 20°C, respectively; modulus of elasticity 3-4x106 psi; mass magnetic susceptibility +1.10x10-6 cgs; surface tension 255 dynes/cm; brick-red color when introduced to flame (flame test); standard reduction potential E° = -2.87V. | [Occurrence]
A few calcium compounds, such as calcium oxide and calcium carbonate have been known since ancient times. The metal was isolated by Davy in 1808. Earlier its amalgam was prepared by Berzelius and Pontin. Calcium is the fifth most abundant element in the earth’s crust, constituting 4.15 % by weight. Its concentration in sea water is 412 mg/L. Calcium is a highly reactive metal and is never found in free elemental form. Its compounds, however,are widely distributed in nature. Some of its common ores are limestone (CaCO3), gypsum (CaSO4?2H2O), fluorite (CaF2), anorthite (CaAl2Si2O8) and apatite (Ca5FP3O12). It also occurs in living matter, as an essential element in bones, teeth, shell, corals, and plant leaves. It constitutes about 2% of body weight, found mostly in bones and teeth. Its concentration in the blood is about 100 mg/L, found in blood proteins and serum.
The few limited applications of calcium are mostly in metallurgy. It is used to produce alloys with aluminum, lead, beryllium, copper, silicon, and other metals; as a desulfurizer, decarburizer, and deoxidizer for ferrous and nonferrous alloys; for removal of bismuth from lead; and as a reducing agent for zirconium, uranium, thorium, and other metals. Minor, non-metallurgical applications include dehydration of organic solvents; purification of helium, argon, and other inert gases to remove nitrogen and other impurities; and as a “getter” for residual gases in vacuum tubes. Calcium compounds have numerous applications (see individual compounds). | [Production Methods]
Calcium may be obtained by electrolytic or thermal reduction of its salts.Electrolytic reduction involves electrolysis of partially molten calcium chloride at 780° to 800°C in a graphite lined steel vessel. The method requires precise control of temperature and current. The solid deposit of metal produced may contain entrapped salt and impurities such as chlorine and nitrogen. It is re-melted to reduce impurity levels.
Currently, thermal reduction processes have replaced the electrolysis method. The starting material in these methods is limestone, which is calcined to produce calcium oxide. The latter is ground, mixed and compacted with aluminum, and reduced at temperatures between 1,000° to 1,200°C under vacuum. Calcium vapors formed in low yield under such thermodynamic conditions are transferred from the reactor and condensed in cool zones, thus shifting the equilibrium to allow formation of more calcium vapors. The reactions are as follows:
4Ca + 2Al → CaO?Al2O3 + 3Ca (vapor)
6Ca + 2Al → 3CaO?Al2O3 + 3Ca (vapor). | [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]. | [Flammability and Explosibility]
Contactwithwaterliberateshighlyflammablegases | [Mechanism of action]
About 48% of serum calcium is ionic, ca 46% is bound to blood proteins, the rest is present as diffusible complexes, e.g., of citrate. The calcium ion level must be maintained within definite limits.
Bones act as a reservoir of certain ions, in particular Ca2+ and PO43-, which readily exchange between bones and blood. Bone structure comprises a strong organic matrix combined with an inorganic phase which is principally hydroxyapatite, 3Ca3(PO4)2·Ca(OH)2. Bones contain two forms of hydroxyapatite. The less soluble crystalline form contributes to the rigidity of the structure. The crystals are quite stable, but because of the small size present a very large surface area available for rapid exchange of ions and molecules with other tissues. There is also a more soluble intercrystalline fraction. Bone salts also contain small amounts of magnesium, sodium, carbonate, citrate, chloride, and fluoride. Osteoporosis is reported to result when bone resorption is relatively faster than bone formation. The calcium ion, necessary for blood-clot formation, stimulates release of bloodclotting factors from platelets. | [First aid]
If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit. | [Carcinogenicity]
No studies on the carcinogenicity
of elemental calcium were noted. The carcinogenicity of
calcium chromate is attributed solely to intracellular soluble
chromium. | [storage]
Color Code—Yellow Stripe (strong reducingagent): Reactivity Hazard; Store separately in an area isolated from flammables, combustibles, or other yellow-codedmaterials. Store in tightly closed containers in a cool, wellventilated area away from water, moisture, oxidizers, andacids. Wherever calcium is used, handled, manufactured, orstored, use explosion-proof electrical equipment andfittings. Store in kerosene or other neutral oil. Do not storelarge quantities of calcium in rooms with sprinkler systems.A detached fire-resistant building is recommended for largestorage. | [Shipping]
Calcium or calcium alloys must be labeled(UN1401): “DANGEROUS WHEN WET” or (UN1855)“SPONTANEOUSLY COMBUSTIBLE.” They fall in(UN1401) Hazard Class 4.3 and Packing Group II;(UN1855) Hazard Class 4.3 and Packing Group I. |
| Safety Data | Back Directory | [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 | [Hazardous Substances Data]
7440-70-2(Hazardous Substances Data) |
|
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