857831-71-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 857831-71-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,8,3 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 857831-71:
(8*8)+(7*5)+(6*7)+(5*8)+(4*3)+(3*1)+(2*7)+(1*1)=211
211 % 10 = 1
So 857831-71-1 is a valid CAS Registry Number.