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Calcium

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Calcium

EINECS 231-179-5
CAS No. 7440-70-2 Density 1.54 g/mL
Solubility Melting Point 850 °C(lit.)
Formula Ca Boiling Point 1484 °C(lit.)
Molecular Weight 40.08 Flash Point
Transport Information Appearance softish silver-white metal
Safety 8-24/25-43 Risk Codes 15
Molecular Structure Molecular Structure of 7440-70-2 (Calcium) Hazard Symbols FlammableF
Synonyms

Atomiccalcium;Blood-coagulation factor IV;Calcium atom;Calcium element;Praval;

 

Calcium Chemical Properties


IUPAC Name: Calcium
Empirical Formula: Ca
Molecular Weight: 40.078
EINECS: 231-179-5
Product Categories: Inorganics; Food & Flavor Additives; Calcium Organic Electronics and Photonics; Alkali Metals Metal and Ceramic Science; Electrode Materials; Metals; Reduction; Substrates and Electrode Materials; Synthetic Reagents
Stability: Stable, but reacts with water to release hydrogen and produce calcium hydroxide. Incompatible with strong oxidizing agents, alcohols, moisture.
Melting Point: 850 °C(lit.)
density: 1.54 g/mL at 25 °C(lit.)
storage temp.: water-free area
Boiling point: 1757 K,1484 °C,2703 °F
Heat of fusion: 8.54 kJ/mol
Heat of vaporization: 154.7 kJ/mol
Specific heat capacity of Calcium (CAS NO.7440-70-2): (25 °C) 25.929 J/mol/K

Calcium History

  Calcium (CAS NO.7440-70-2) was known as early as the first century when the Ancient Romans prepared lime as calcium oxide. Literature dating back to 975 AD notes that plaster of paris (calcium sulphate), is useful for setting broken bones. It was not isolated until 1808 in England when Sir Humphry Davy electrolyzed a mixture of lime and mercuric oxide. Davy was trying to isolate calcium; when he heard that Swedish chemist J?ns Jakob Berzelius and Pontin prepared calcium amalgam by electrolyzing lime in mercury, he tried it himself. He worked with electrolysis throughout his life and also discovered/isolated sodium, potassium, magnesium, boron and barium. Calcium metal was not available in large scale until the beginning of the 20th century.

Calcium Uses

 Calcium (CAS NO.7440-70-2) is used as a reducing agent in the extraction of other metals, such as uranium, zirconium, and thorium,as a deoxidizer, desulfurizer, or decarbonizer for various ferrous and nonferrous alloys and used as an alloying agent used in the production of aluminium, beryllium, copper, lead, and magnesium alloys. It is used in the making of cements and mortars to be used in construction.,in the making of cheese, where calcium ions influence the activity of rennin in bringing about the coagulation of milk.

Calcium Safety Profile

Hazard Codes: FlammableF
Risk Statements: 15 
R15:Contact with water liberates extremely flammable gases.
Safety Statements: 8-24/25-43 
S8:Keep container dry. 
S24/25:Avoid contact with skin and eyes. 
S43:In case of fire use ... (there follows the type of fire-fighting equipment to be used.)
RIDADR: UN 1401 4.3/PG 2
WGK Germany: 1
HazardClass: 4.3
PackingGroup: II

Calcium Standards and Recommendations

DOT Classification:  4.3; Label: Dangerous When Wet

Calcium Analytical Methods

For occupational chemical analysis use NIOSH: Calcium, 7020.

Calcium Specification

  Calcium (CAS NO.7440-70-2), its Synonyms are Elemental calcium ; HSDB 273 ; UNII-SY7Q814VUP . It is silvery, soft metal that turns grayish white on exposure to air. Calcium is a soft gray alkaline earth metal, and is the fifth most abundant element by mass in the Earth's crust. Calcium is also the fifth most abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.

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