7757-33-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7757-33-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,5 and 7 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 7757-33:
(6*7)+(5*7)+(4*5)+(3*7)+(2*3)+(1*3)=127
127 % 10 = 7
So 7757-33-7 is a valid CAS Registry Number.