690643-89-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 690643-89-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,0,6,4 and 3 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 690643-89:
(8*6)+(7*9)+(6*0)+(5*6)+(4*4)+(3*3)+(2*8)+(1*9)=191
191 % 10 = 1
So 690643-89-1 is a valid CAS Registry Number.