Element Sulfur

Sulfur ElementSulfur (in non-scientific British use also sulphur) is a chemical element with the symbol S and atomic number 16.
It is abundant, multivalent, and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8.
Elemental sulfur is a bright yellow, crystalline solid at room temperature.
Sulfur burns with a blue flame with formation of sulfur dioxide, which has a suffocating and irritating odor.
Sulfur is insoluble in water but soluble in carbon disulfide and, to a lesser extent, in other nonpolar organic solvents, such as benzene and toluene.

Names and Identifiers

Chemical Formula:S
CAS:7704-34-9
Molecular Weight:256.520g/mol
EC Number :231-722-6
MDL Number:MFCD00085316
Color:yellow/ lemon yellow
Other Names:Soufre, Schwefel, Di zolfo
PubChem CID:402
IUPAC Name:Sulfur
Inchl:InChI=1S/S
InChI Key:NINIDFKCEFEMDL-UHFFFAOYSA-N
Canonical SMILES:[S]
ICSC Number:1166

Physical & Chemical Properties

Phase:Solid
Density:1.819 g/cm³
Boiling Point:717.8 K ​(444.6 °C, ​832.3 °F)
Melting Point:388.36 K ​(115.21 °C, ​239.38 °F)
Molecular Formula:S
Flash Point:168 °C
Exact Mass:255.776566
Symbol:Globally Harmonized System of Classification
Signal Word:Warning
Hazard Statements:H315
Precautionary Statements:n/a
Hazard Codes:F:Flammable
Risk Phrases:R11
Safety Phrases:S16-S26
RIDADR:UN 1350 4.1/PG 3
WGK Germany:1
RTECS:WS4250000
Packaging Group:III
Hazard Class:4.1

Sulfur isotopes are mainly used in medical applications. S-33 is used for the production of the therapeutic radioisotope P-33. S-32 is used for the production of the radioisotope P-32 which is also used for therapeutic purposes. S-34 can be used for the production of the medical radioisotope Cl-34m and for S-35. Both S-33 and S-34 are used for genome research. Finally, S-36 has been used for the production of the radioisotopes S-37 and S-38.

Naturally occurring isotopes

IsotopeMass/DaNatural abundance (atom %)Nuclear spin (I)Magnetic moment (μ/μN)
32S31.97207070 (25)94.93 (31)00
33S32.97145843 (23)0.76 (2)3/20.643821
34S33.96786665 (22)4.29 (28)00
36S35.96708062 (27)0.02 (1)00

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
30S29.9849031.18 sEC to 30P0
31S30.9795552.56 sEC to 31P1/2
35S34.969032287.2 dβ to 35Cl3/21.00
37S36.97112575.05 mβ to 37Cl
38S37.971162.84 hβ to 38Cl0
39S38.9751411.5 sβ to 39Cl
40S39.97559 sβ to 40Cl

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