156441-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156441-21-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,4,4 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 156441-21:
(8*1)+(7*5)+(6*6)+(5*4)+(4*4)+(3*1)+(2*2)+(1*1)=123
123 % 10 = 3
So 156441-21-3 is a valid CAS Registry Number.