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7440-24-6

7440-24-6 structural image
Product Name: STRONTIUM
Formula: Sr
Synonyms: Strontium element
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CHEMICAL AND PHYSICAL PROPERTIES

Physical Description Other Solid
Color/Form Silvery white metal; face-centered cubic structure
Boiling Point 1390 °C
Melting Point 752 °C
Solubility Soluble in alcohol and acids.
Density 2.54 g/cu cm
Vapor Pressure 4.99X10-11 Pa at 400 K; 0.000429 Pa at 600 K; 1.134 Pa at 800 K; 121 Pa at 1000 K
Stability/Shelf Life Rapidly becomes yellow on exposure to air and assumes an oxide film.
Other Experimental Properties Natural strontium is a mixture of four isotopes; 32 other unstable isotopes are known to exist. Three allotropic forms exist, with transition points at 235 and 540 °C.
Chemical Classes Metals -> Elements, Metallic

SAFETY INFORMATION

Signal word Danger
Pictogram(s)

Flame
Flammables
GHS02

Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H260:Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases
H315:Skin corrosion/irritation
Precautionary Statement Codes P231+P232:Handle under inert gas. Protect from moisture.
P302+P352:IF ON SKIN: wash with plenty of soap and water.

COMPUTED DESCRIPTORS

Molecular Weight 87.62 g/mol
Hydrogen Bond Donor Count 0
Hydrogen Bond Acceptor Count 0
Rotatable Bond Count 0
Exact Mass 87.90561225 g/mol
Monoisotopic Mass 87.90561225 g/mol
Topological Polar Surface Area 0 Ų
Heavy Atom Count 1
Formal Charge 0
Complexity 0
Isotope Atom Count 0
Defined Atom Stereocenter Count 0
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 1
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Strontium is a naturally occurring element found in rocks, soil, dust, coal, and oil. Naturally occurring strontium is not radioactive and is either referred to as stable strontium or strontium. Strontium in the environment exists in four stable isotopes,84Sr (read as strontium eighty-four),86Sr,87Sr,88Sr. Strontium compounds are used in making ceramics and glass products, pyrotechnics, paint pigments, fluorescent lights, and medicines. Strontium can also exist as several radioactive isotopes; the most common is90Sr.90Sr is formed in nuclear reactors or during the explosion of nuclear weapons. Radioactive strontium generates beta particles as it decays. One of the radioactive properties of strontium is half-life, or the time it takes for half of the isotope to give off its radiation and change into another substance. The half-life of90Sr is 29 years.