1556770-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1556770-90-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,5,6,7,7 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1556770-90:
(9*1)+(8*5)+(7*5)+(6*6)+(5*7)+(4*7)+(3*0)+(2*9)+(1*0)=201
201 % 10 = 1
So 1556770-90-1 is a valid CAS Registry Number.