858421-09-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 858421-09-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,8,4,2 and 1 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 858421-09:
(8*8)+(7*5)+(6*8)+(5*4)+(4*2)+(3*1)+(2*0)+(1*9)=187
187 % 10 = 7
So 858421-09-7 is a valid CAS Registry Number.