331665-83-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 331665-83-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,1,6,6 and 5 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 331665-83:
(8*3)+(7*3)+(6*1)+(5*6)+(4*6)+(3*5)+(2*8)+(1*3)=139
139 % 10 = 9
So 331665-83-9 is a valid CAS Registry Number.