Ricin

CAS RN: 9009-86-3

Major Uses

Ricin is poisonous if inhaled, injected, or ingested, acting as a toxin by the inhibition of protein synthesis.
Ricin, or the toxin-rich chaff by-product of castor oil manufacture, has been used to kill mice and moles.
Bioterrorism /agent/.
As a tool in studies of cell-surface properties; experimentally in cancer research.
Reagent for pepsin and trypsin, agriculture.
Its preferred use seems to be as an assassin's weapon, and there are documented cases of umbrellas being used as a means of injecting a "ricin ball" into a human target.
Being studied for use in cancer chemotherapy, in bone marrow transplantation, and cell-based research
Medication
"Ricin", the original term for the mixed extract, is now used in various ways. Two ricin agglutinins and two toxins have been identified. All four lectins consist of two different polypeptide chains joined by a disulfide bond; the toxins are dimers of an A-chain (30,000 Da) and a B-chain (33,000 Da) and the agglutinins occur as a tetramer composed of two 30,000 and two 33,000 mol wt subunits.
Find more information on this substance at: PubChem, PubMed