SO₂ may refer to: In science: *

Sulfur dioxide Sulfur dioxide (IUPAC-recommended spelling) or sulphur dioxide (traditional Commonwealth English) is the chemical compound with the formula . It is a toxic gas responsible for the odor of burnt matches. It is released naturally by volcanic activ ...

(SO₂), an oxide of sulfur, a chemical compound **to a

Sulfonyl In organosulfur chemistry, a sulfonyl group can refer either to a functional group found primarily in sulfones, or to a substituent obtained from a sulfonic acid by the removal of the hydroxyl group, similarly to acyl groups. Sulfonyl groups c ...

group (R-SO₂-R) * The

special orthogonal group In mathematics, the orthogonal group in dimension , denoted , is the group of distance-preserving transformations of a Euclidean space of dimension that preserve a fixed point, where the group operation is given by composing transformations. T ...

of degree 2 *

oxygen saturation Oxygen saturation (symbol SO2) is a relative measure of the concentration of oxygen that is dissolved or carried in a given medium as a proportion of the maximal concentration that can be dissolved in that medium at the given temperature. It ca ...

(SO₂), in medicine of blood oxygenation *

S2 (star) S2, also known as S0–2, is a star in Sagittarius A* cluster, the star cluster close to the supermassive black hole Sagittarius A*, Sagittarius A* (Sgr A*), orbiting it with a period of 16.0518 years, a semi-major axis of ...

, aka SO-2, is the name of a star near the central black hole at the center of the Milky Way galaxy that takes 16 years to orbit that black hole. * 2015 SO₂, an Aten asteroid in a horseshoe orbit co-orbital with Earth It may also refer to: * A

staff officer A military staff or general staff (also referred to as army staff, navy staff, or air staff within the individual services) is a group of officers, enlisted and civilian staff who serve the commander of a division or other large military un ...

of the second class, often a commissioned officer of lieutenant commander, major or squadron leader rank * A London Metropolitan Police

Specialist Operations The Specialist Operations directorate is a unit of the Metropolitan Police of London, UK responsible for providing specialist policing capabilities including national security and counter-terrorism operations. The Specialist Operations Directorate ...

command division * Special Operations 2 – Operational, of SOE (Special Operations Executive, British, World War II) * '' Star Ocean 2'', a video game * ''SO2'' (album), a 2010 album by Shinichi Osawa * An abbreviation of "Shout-out to"

See also