164793-21-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 164793-21-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,4,7,9 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 164793-21:
(8*1)+(7*6)+(6*4)+(5*7)+(4*9)+(3*3)+(2*2)+(1*1)=159
159 % 10 = 9
So 164793-21-9 is a valid CAS Registry Number.