Benzene,
1,1',1'',1'''-(5,5-dimethoxy-1,3-cyclopentadiene-1,2,3,4-tetrayl)tetrakis- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 65116-02-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,5,1,1 and 6 respectively; the second part has 2 digits, 0 and 2 respectively. Calculate Digit Verification of CAS Registry Number 65116-02: (7*6)+(6*5)+(5*1)+(4*1)+(3*6)+(2*0)+(1*2)=101 101 % 10 = 1 So 65116-02-1 is a valid CAS Registry Number.