669771-41-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669771-41-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,9,7,7 and 1 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 669771-41:
(8*6)+(7*6)+(6*9)+(5*7)+(4*7)+(3*1)+(2*4)+(1*1)=219
219 % 10 = 9
So 669771-41-9 is a valid CAS Registry Number.