7645-55-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7645-55-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,6,4 and 5 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 7645-55:
(6*7)+(5*6)+(4*4)+(3*5)+(2*5)+(1*5)=118
118 % 10 = 8
So 7645-55-8 is a valid CAS Registry Number.