291778-79-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 291778-79-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,9,1,7,7 and 8 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 291778-79:
(8*2)+(7*9)+(6*1)+(5*7)+(4*7)+(3*8)+(2*7)+(1*9)=195
195 % 10 = 5
So 291778-79-5 is a valid CAS Registry Number.