156621-71-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156621-71-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,6,2 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 156621-71:
(8*1)+(7*5)+(6*6)+(5*6)+(4*2)+(3*1)+(2*7)+(1*1)=135
135 % 10 = 5
So 156621-71-5 is a valid CAS Registry Number.