216861-19-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216861-19-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,8,6 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 216861-19:
(8*2)+(7*1)+(6*6)+(5*8)+(4*6)+(3*1)+(2*1)+(1*9)=137
137 % 10 = 7
So 216861-19-7 is a valid CAS Registry Number.