1642885-89-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1642885-89-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,2,8,8 and 5 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1642885-89:
(9*1)+(8*6)+(7*4)+(6*2)+(5*8)+(4*8)+(3*5)+(2*8)+(1*9)=209
209 % 10 = 9
So 1642885-89-9 is a valid CAS Registry Number.