338421-39-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 338421-39-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,8,4,2 and 1 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 338421-39:
(8*3)+(7*3)+(6*8)+(5*4)+(4*2)+(3*1)+(2*3)+(1*9)=139
139 % 10 = 9
So 338421-39-9 is a valid CAS Registry Number.