662156-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 662156-57-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,2,1,5 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 662156-57:
(8*6)+(7*6)+(6*2)+(5*1)+(4*5)+(3*6)+(2*5)+(1*7)=162
162 % 10 = 2
So 662156-57-2 is a valid CAS Registry Number.