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Syn-propanethial-S-oxide

 

 
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Syn-propanethial-S-oxide
 
 
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Syn-propanethial-S-oxide is a volatile gas that has lachrymator effects (e.g. triggers tears when an onion
Onion

Onion is a term used for many plants in the genus Allium. They are known by the common name "onion" but, used without qualifiers, it usually refers to Allium cepa....
 is cut). As onions are sliced, cells
Cell (biology)

The cell is the structural and functional unit of all known Life organisms. It is the smallest unit of an organism that is classified as living, and is often called the building bricks of life....
 are broken, allowing enzymes called alliinase
Alliinase

Alliinases are a class of enzymes found in plants of the genus Allium, such as garlic and onions. Alliinase is responsible for catalysis chemical reactions that produce the volatile chemicals that give these foods their flavors, odors, and tear-inducing properties....
s to break down amino acid
Amino acid

In chemistry, an amino acid is a molecule containing both amine and carboxyl functional groups. These molecules are particularly important in biochemistry, where this term refers to alpha-amino acids with the general formula H2NCHRCOOH, where R is an organic substituent....
 sulfoxide
Sulfoxide

A sulfoxide is a chemical compound containing a sulfinyl functional group attached to two carbon atoms. Sulfoxides can be considered as oxidized thioether....
s and generate sulfenic acid
Sulfenic acid

A sulfenic acid is an organosulfur chemical compound and oxoacid with the general formula substituentsulfuroxygenhydrogen, where R ? H. Sulfenic acids are generally unstable....
s . Sulfenic acids are unstable and spontaneously rearrange into syn-propanethial-S-oxide. The gas dissipates through the air and eventually reaches the eye, where it binds with sensory neurons creating a stinging, painful sensation.






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Encyclopedia


Syn-propanethial-S-oxide is a volatile gas that has lachrymator effects (e.g. triggers tears when an onion
Onion

Onion is a term used for many plants in the genus Allium. They are known by the common name "onion" but, used without qualifiers, it usually refers to Allium cepa....
 is cut). As onions are sliced, cells
Cell (biology)

The cell is the structural and functional unit of all known Life organisms. It is the smallest unit of an organism that is classified as living, and is often called the building bricks of life....
 are broken, allowing enzymes called alliinase
Alliinase

Alliinases are a class of enzymes found in plants of the genus Allium, such as garlic and onions. Alliinase is responsible for catalysis chemical reactions that produce the volatile chemicals that give these foods their flavors, odors, and tear-inducing properties....
s to break down amino acid
Amino acid

In chemistry, an amino acid is a molecule containing both amine and carboxyl functional groups. These molecules are particularly important in biochemistry, where this term refers to alpha-amino acids with the general formula H2NCHRCOOH, where R is an organic substituent....
 sulfoxide
Sulfoxide

A sulfoxide is a chemical compound containing a sulfinyl functional group attached to two carbon atoms. Sulfoxides can be considered as oxidized thioether....
s and generate sulfenic acid
Sulfenic acid

A sulfenic acid is an organosulfur chemical compound and oxoacid with the general formula substituentsulfuroxygenhydrogen, where R ? H. Sulfenic acids are generally unstable....
s . Sulfenic acids are unstable and spontaneously rearrange into syn-propanethial-S-oxide. The gas dissipates through the air and eventually reaches the eye, where it binds with sensory neurons creating a stinging, painful sensation. Tear glands produce tears to dilute and flush out the irritant.

Properties


Syn-propanethial-S-oxide has a chemical formula of C3H6OS.

See also

  • Allicin
    Allicin

    Allicin is an organic compound obtained from garlic. It is also obtainable from onions, and other species in the family Alliaceae. It was first isolated and studied in the laboratory by Chester J....