107977-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 107977-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,7,9,7 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 107977-55:
(8*1)+(7*0)+(6*7)+(5*9)+(4*7)+(3*7)+(2*5)+(1*5)=159
159 % 10 = 9
So 107977-55-9 is a valid CAS Registry Number.