666739-59-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666739-59-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,7,3 and 9 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 666739-59:
(8*6)+(7*6)+(6*6)+(5*7)+(4*3)+(3*9)+(2*5)+(1*9)=219
219 % 10 = 9
So 666739-59-9 is a valid CAS Registry Number.