877817-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 877817-57-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,7,8,1 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 877817-57:
(8*8)+(7*7)+(6*7)+(5*8)+(4*1)+(3*7)+(2*5)+(1*7)=237
237 % 10 = 7
So 877817-57-7 is a valid CAS Registry Number.