331657-63-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 331657-63-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,1,6,5 and 7 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 331657-63:
(8*3)+(7*3)+(6*1)+(5*6)+(4*5)+(3*7)+(2*6)+(1*3)=137
137 % 10 = 7
So 331657-63-7 is a valid CAS Registry Number.