6995-31-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6995-31-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,9,9 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6995-31:
(6*6)+(5*9)+(4*9)+(3*5)+(2*3)+(1*1)=139
139 % 10 = 9
So 6995-31-9 is a valid CAS Registry Number.