690639-59-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 690639-59-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,0,6,3 and 9 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 690639-59:
(8*6)+(7*9)+(6*0)+(5*6)+(4*3)+(3*9)+(2*5)+(1*9)=199
199 % 10 = 9
So 690639-59-9 is a valid CAS Registry Number.