277756-65-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 277756-65-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,7,7,5 and 6 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 277756-65:
(8*2)+(7*7)+(6*7)+(5*7)+(4*5)+(3*6)+(2*6)+(1*5)=197
197 % 10 = 7
So 277756-65-7 is a valid CAS Registry Number.