1621253-40-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1621253-40-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,1,2,5 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1621253-40:
(9*1)+(8*6)+(7*2)+(6*1)+(5*2)+(4*5)+(3*3)+(2*4)+(1*0)=124
124 % 10 = 4
So 1621253-40-4 is a valid CAS Registry Number.