1630981-23-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1630981-23-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,0,9,8 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1630981-23:
(9*1)+(8*6)+(7*3)+(6*0)+(5*9)+(4*8)+(3*1)+(2*2)+(1*3)=165
165 % 10 = 5
So 1630981-23-5 is a valid CAS Registry Number.