4,9-diphenyl-2,2,7,7-tetraethoxy-3,5,8,10-tetraoxo-1,4,6,9-tetraaza-2,7-diphosphatricycle<5.3.0.02,6>decane is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 81634-58-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,3 and 4 respectively; the second part has 2 digits, 5 and 8 respectively. Calculate Digit Verification of CAS Registry Number 81634-58: (7*8)+(6*1)+(5*6)+(4*3)+(3*4)+(2*5)+(1*8)=134 134 % 10 = 4 So 81634-58-4 is a valid CAS Registry Number.