((2E,4E)-6-Ethyl-nona-2,4,8-trienyl)-phosphonic acid dimethyl ester is a complex organic compound with the molecular formula C11H19O3P. It is characterized by a 6-ethyl-nona-2,4,8-trienyl moiety, which consists of a nine-carbon chain with three double bonds (in the 2, 4, and 8 positions) and an ethyl group attached to the 6th carbon. The phosphonic acid group is attached to this chain, and it is further esterified with two methyl groups, making it a dimethyl ester. ((2E,4E)-6-Ethyl-nona-2,4,8-trienyl)-phosphonic acid dimethyl ester is known for its potential applications in the synthesis of various organic compounds and as a reagent in chemical reactions. It is important to note that handling and use of such chemicals require appropriate safety measures due to their potential reactivity and toxicity.
The CAS Registry Mumber 85657-55-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,5,6,5 and 7 respectively; the second part has 2 digits, 5 and 5 respectively. Calculate Digit Verification of CAS Registry Number 85657-55: (7*8)+(6*5)+(5*6)+(4*5)+(3*7)+(2*5)+(1*5)=172 172 % 10 = 2 So 85657-55-2 is a valid CAS Registry Number.