156783-21-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156783-21-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,7,8 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 156783-21:
(8*1)+(7*5)+(6*6)+(5*7)+(4*8)+(3*3)+(2*2)+(1*1)=160
160 % 10 = 0
So 156783-21-0 is a valid CAS Registry Number.