21917-35-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21917-35-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,1 and 7 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21917-35:
(7*2)+(6*1)+(5*9)+(4*1)+(3*7)+(2*3)+(1*5)=101
101 % 10 = 1
So 21917-35-1 is a valid CAS Registry Number.