217956-14-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217956-14-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,9,5 and 6 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 217956-14:
(8*2)+(7*1)+(6*7)+(5*9)+(4*5)+(3*6)+(2*1)+(1*4)=154
154 % 10 = 4
So 217956-14-4 is a valid CAS Registry Number.