857561-40-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 857561-40-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,5,6 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 857561-40:
(8*8)+(7*5)+(6*7)+(5*5)+(4*6)+(3*1)+(2*4)+(1*0)=201
201 % 10 = 1
So 857561-40-1 is a valid CAS Registry Number.