3777-23-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3777-23-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,7,7 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3777-23:
(6*3)+(5*7)+(4*7)+(3*7)+(2*2)+(1*3)=109
109 % 10 = 9
So 3777-23-9 is a valid CAS Registry Number.