121638-23-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121638-23-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,6,3 and 8 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121638-23:
(8*1)+(7*2)+(6*1)+(5*6)+(4*3)+(3*8)+(2*2)+(1*3)=101
101 % 10 = 1
So 121638-23-1 is a valid CAS Registry Number.