137777-74-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137777-74-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,7,7 and 7 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 137777-74:
(8*1)+(7*3)+(6*7)+(5*7)+(4*7)+(3*7)+(2*7)+(1*4)=173
173 % 10 = 3
So 137777-74-3 is a valid CAS Registry Number.