1,3,5,7-tetrahydro-1,1,3,3,5,5,7,7-octamethylbenzo[1,2-c:4,5-c']bis[1,2,5]oxadisilole is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 51118-21-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,1,1 and 8 respectively; the second part has 2 digits, 2 and 1 respectively. Calculate Digit Verification of CAS Registry Number 51118-21: (7*5)+(6*1)+(5*1)+(4*1)+(3*8)+(2*2)+(1*1)=79 79 % 10 = 9 So 51118-21-9 is a valid CAS Registry Number.