1234556-16-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1234556-16-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,4,5,5 and 6 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1234556-16:
(9*1)+(8*2)+(7*3)+(6*4)+(5*5)+(4*5)+(3*6)+(2*1)+(1*6)=141
141 % 10 = 1
So 1234556-16-1 is a valid CAS Registry Number.