5-nitro-2-pyridyl β-D-galactoside is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 250129-74-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,0,1,2 and 9 respectively; the second part has 2 digits, 7 and 4 respectively. Calculate Digit Verification of CAS Registry Number 250129-74: (8*2)+(7*5)+(6*0)+(5*1)+(4*2)+(3*9)+(2*7)+(1*4)=109 109 % 10 = 9 So 250129-74-9 is a valid CAS Registry Number.