166756-72-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 166756-72-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,6,7,5 and 6 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 166756-72:
(8*1)+(7*6)+(6*6)+(5*7)+(4*5)+(3*6)+(2*7)+(1*2)=175
175 % 10 = 5
So 166756-72-5 is a valid CAS Registry Number.