217823-13-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217823-13-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,8,2 and 3 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 217823-13:
(8*2)+(7*1)+(6*7)+(5*8)+(4*2)+(3*3)+(2*1)+(1*3)=127
127 % 10 = 7
So 217823-13-7 is a valid CAS Registry Number.