821787-99-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 821787-99-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,2,1,7,8 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 821787-99:
(8*8)+(7*2)+(6*1)+(5*7)+(4*8)+(3*7)+(2*9)+(1*9)=199
199 % 10 = 9
So 821787-99-9 is a valid CAS Registry Number.