1256561-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1256561-21-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,6,5,6 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1256561-21:
(9*1)+(8*2)+(7*5)+(6*6)+(5*5)+(4*6)+(3*1)+(2*2)+(1*1)=153
153 % 10 = 3
So 1256561-21-3 is a valid CAS Registry Number.