Dimethyl sulfoxide
SIAL/01934 - for inorganic trace analysis, ≥99.99995% (metals basis)
Synonym: DMSO
CAS Number: 67-68-5
Empirical Formula (Hill Notation): C2H6OS
Molecular Weight: 78.13
EC Number: 200-664-3
MDL Number: MFCD00002089
Linear Formula: (CH3)2SO
Product Type: Chemical
assay | ≥99.9% (GC) |
≥99.99995% (metals basis) | |
autoignition temp. | 573 °F |
bp | 189 °C |
189 °C (lit.) | |
cation traces | Ag: ≤0.5 μg/kg |
Al: ≤1 μg/kg | |
As: ≤0.01 mg/kg | |
Au: ≤0.5 μg/kg | |
Be: ≤0.5 μg/kg | |
Bi: ≤0.5 μg/kg | |
Ca: ≤20 μg/kg | |
Cd: ≤0.5 μg/kg | |
Ce: ≤0.5 μg/kg | |
Co: ≤0.5 μg/kg | |
Cr: ≤5 μg/kg | |
Cs: ≤0.5 μg/kg | |
Cu: ≤5 μg/kg | |
Fe: ≤20 μg/kg | |
Ga: ≤0.5 μg/kg | |
Ge: ≤0.5 μg/kg | |
Hg: ≤5 μg/kg | |
In: ≤10 μg/kg | |
Ir: ≤0.5 μg/kg | |
K: ≤10 μg/kg | |
Li: ≤0.5 μg/kg | |
Mg: ≤10 μg/kg | |
Mn: ≤5 μg/kg | |
Mo: ≤0.5 μg/kg | |
Na: ≤50 μg/kg | |
Ni: ≤5 μg/kg | |
Os: ≤1 μg/kg | |
Pb: ≤0.5 μg/kg | |
Pd: ≤0.5 μg/kg | |
Pt: ≤0.5 μg/kg | |
Rb: ≤0.5 μg/kg | |
Rh: ≤0.5 μg/kg | |
Ru: ≤0.5 μg/kg | |
Sb: ≤0.5 μg/kg | |
Se: ≤0.01 mg/kg | |
Sn: ≤0.5 μg/kg | |
Sr: ≤0.5 μg/kg | |
Ti: ≤5 μg/kg | |
Tl: ≤0.5 μg/kg | |
U: ≤0.5 μg/kg | |
V: ≤0.5 μg/kg | |
Zn: ≤5 μg/kg | |
Zr: ≤0.5 μg/kg | |
color | colorless |
density | 1.099-1.101 g/mL at 20 °C |
1.10 g/mL (lit.) | |
expl. lim. | 42 % |
42 %, 63 °F | |
form | liquid |
grade | for inorganic trace analysis |
InChI | 1S/C2H6OS/c1-4(2)3/h1-2H3 |
InChI key | IAZDPXIOMUYVGZ-UHFFFAOYSA |
mp | 16-19 °C |
16-19 °C (lit.) | |
Quality Level | 100 ![]() |
refractive index | n |
SMILES string | CS(C)=O |
solubility | H2O: miscible (completely) |
vapor density | 2.7 (vs air) |
vapor pressure | 0.42 mmHg |
0.42 mmHg ( 20 °C) |
Caution: | Supercools easily and remelts slowly at room temperature. Solidified product can be re-liquified by warming to room temperature without detriment to the product. |
Other Notes: | For information on dimethyl sulfoxide miscibility, please visit the following link: Dimethyl Sulfoxide Miscibility/Immiscibility Table ![]() |
WGK Germany | WGK 1 |
Flash Point(F) | 188.6 °F - closed cup |
Flash Point(C) | 87 °C - closed cup |
Purity | ≥99.9% (GC); ≥99.99995% (metals basis) |
bp | 189 °C (lit.); 189 °C |
mp | 16-19 °C (lit.); 16-19 °C |
Density | 1.099-1.101 g/mL at 20 °C; 1.10 g/mL (lit.) |
Refractive Index | n |
UNSPSC | 41116105 |