137937-80-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137937-80-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,9,3 and 7 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 137937-80:
(8*1)+(7*3)+(6*7)+(5*9)+(4*3)+(3*7)+(2*8)+(1*0)=165
165 % 10 = 5
So 137937-80-5 is a valid CAS Registry Number.