1227561-77-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1227561-77-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,7,5,6 and 1 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1227561-77:
(9*1)+(8*2)+(7*2)+(6*7)+(5*5)+(4*6)+(3*1)+(2*7)+(1*7)=154
154 % 10 = 4
So 1227561-77-4 is a valid CAS Registry Number.