α-Phenyl-trans-orthozimtsaeure-tris-(2-chlorethylester), also known as tris(2-chloroethyl) ortho-phenylene phosphate, is a chemical compound with the molecular formula C12H15Cl3O4P. It is a colorless, viscous liquid that is soluble in organic solvents. α-Phenyl-trans-orthozimtsaeure-tris-(2-chlorethylester) is primarily used as a chemical warfare agent, specifically as a nerve agent. It inhibits the enzyme acetylcholinesterase, leading to the accumulation of acetylcholine in the nervous system, which results in overstimulation and subsequent failure of the muscles. Due to its high toxicity and potential for misuse, the production and stockpiling of this chemical are regulated under various international treaties, including the Chemical Weapons Convention.
The CAS Registry Mumber 18657-23-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,6,5 and 7 respectively; the second part has 2 digits, 2 and 3 respectively. Calculate Digit Verification of CAS Registry Number 18657-23: (7*1)+(6*8)+(5*6)+(4*5)+(3*7)+(2*2)+(1*3)=133 133 % 10 = 3 So 18657-23-3 is a valid CAS Registry Number.