1211520-18-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1211520-18-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,1,5,2 and 0 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1211520-18:
(9*1)+(8*2)+(7*1)+(6*1)+(5*5)+(4*2)+(3*0)+(2*1)+(1*8)=81
81 % 10 = 1
So 1211520-18-1 is a valid CAS Registry Number.