2,6,2',6'-tetramethyl-4,4'-dioxo-1,4,1',4'-tetrahydro-1,1'-p-phenylene-bis-pyridine-3,5-dicarboxylic acid tetraethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 39905-65-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,9,0 and 5 respectively; the second part has 2 digits, 6 and 5 respectively. Calculate Digit Verification of CAS Registry Number 39905-65: (7*3)+(6*9)+(5*9)+(4*0)+(3*5)+(2*6)+(1*5)=152 152 % 10 = 2 So 39905-65-2 is a valid CAS Registry Number.