1261521-42-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1261521-42-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,6,1,5,2 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1261521-42:
(9*1)+(8*2)+(7*6)+(6*1)+(5*5)+(4*2)+(3*1)+(2*4)+(1*2)=119
119 % 10 = 9
So 1261521-42-9 is a valid CAS Registry Number.