176639-52-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 176639-52-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,6,6,3 and 9 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 176639-52:
(8*1)+(7*7)+(6*6)+(5*6)+(4*3)+(3*9)+(2*5)+(1*2)=174
174 % 10 = 4
So 176639-52-4 is a valid CAS Registry Number.