2,4,6,8-tetraphenyl-1,5(2,5)-dipyrrola-3(2,5)-tellurophena-7(2,5)-thiophena-cyclooctaphane-1(2),4,6,7(8)-tetraene is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 68231-96-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,2,3 and 1 respectively; the second part has 2 digits, 9 and 6 respectively. Calculate Digit Verification of CAS Registry Number 68231-96: (7*6)+(6*8)+(5*2)+(4*3)+(3*1)+(2*9)+(1*6)=139 139 % 10 = 9 So 68231-96-9 is a valid CAS Registry Number.