664311-85-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664311-85-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,4,3,1 and 1 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 664311-85:
(8*6)+(7*6)+(6*4)+(5*3)+(4*1)+(3*1)+(2*8)+(1*5)=157
157 % 10 = 7
So 664311-85-7 is a valid CAS Registry Number.