669757-67-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669757-67-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,9,7,5 and 7 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 669757-67:
(8*6)+(7*6)+(6*9)+(5*7)+(4*5)+(3*7)+(2*6)+(1*7)=239
239 % 10 = 9
So 669757-67-9 is a valid CAS Registry Number.