637768-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 637768-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,7,7,6 and 8 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 637768-55:
(8*6)+(7*3)+(6*7)+(5*7)+(4*6)+(3*8)+(2*5)+(1*5)=209
209 % 10 = 9
So 637768-55-9 is a valid CAS Registry Number.