Element Antimony

Antimony ElementIt is a chemical element with the symbol Sb (from Latin: stibium) and atomic number 51.
A lustrous gray metalloid, Element Antimony is found in nature mainly as the sulfide mineral stibnite (Sb2S3).
Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl.Metallic antimony was also known, but it was erroneously identified as lead upon its discovery.
Antimony is a member of group 15 of the periodic table, one of the elements called pnictogens, and has an electronegativity of 2.05. In accordance with periodic trends, it is more electronegative than tin or bismuth, and less electronegative than tellurium or arsenic

Names and Identifiers

Chemical Formula:Sb
CAS:7440-36-0
Molecular Weight:121.76000g/mol
EC Number :231-146-5
MDL Number:MFCD00134030
Color:silvery lustrous gray/ silvery-white
Other Names:n/a
PubChem CID:5354495
IUPAC Name:Antimony
Inchl:InChI=1S/Sb
InChI Key:WATWJIUSRGPENY-UHFFFAOYSA-N
Canonical SMILES:[Sb]
ICSC Number:0775

Physical & Chemical Properties

Phase:Solid
Density:6.697 g/cm³
Boiling Point:1908 K ​(1635 °C, ​2975 °F)
Melting Point:903.78 K ​(630.63 °C, ​1167.13 °F)
Molecular Formula:Sb
Flash Point:1380°C
Exact Mass:120.90400
Symbol:Globally Harmonized System of ClassificationGlobally Harmonized System of Classification
Signal Word:Warning
Hazard Statements:H302 + H332-H411
Precautionary Statements:P273
Hazard Codes:Xn:Harmful
Risk Phrases:R20/22;R51/53
Safety Phrases:S60-S61-S36/37/39-S26
RIDADR:UN 3264 8/PG 2
WGK Germany:2
RTECS:CC4025000
Packaging Group:III
Hazard Class:6.1

The two Antimony isotopes are used for the production of medical radioisotopes. Sb-121 can be used for the production of I-124, although this medical radioisotope is usually produced via Te-124. Sb-121 and Sb-123 can both be used for the production of I-123, although the most common production route is via Xe-124 or Te-123.

Naturally occurring isotopes

IsotopeMass/DaNatural abundance (atom %)Nuclear spin (I)Magnetic moment (μ/μN)
121Sb120.9038212 (29)57.21 (5)5/23.3634
123Sb122.9042160 (24)42.79 (5)7/22.5498

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
117Sb116.904842.80 hEC to 117Sn5/2
118Sb117.9055333.6 mEC to 118Sn1
119Sb118.9039538.1 hEC to 119Sn5/23.45
120Sb119.9050815.89 mEC to 120Sn12.3
122Sb121.905182.72 dEC to 122Sn; β to 122Te2-1.90
124Sb123.90593860.30 dβ to 124Te31.2
125Sb124.9052472.758 yβ to 125Te7/22.63
126Sb125.9072512.4 dβ to 126Te81.3
127Sb126.9069143.84 dβ to 127Te7/22.7
128Sb127.909179.1 hβ to 128Te81.3
129Sb128.909154.40 hβ to 129Te7/2

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