2,2-diethyl-6,11-diphenyl-5a,6,11,11a-tetrahydro-benzo[g]pyrazolo[1,2-b]phthalazine-1,3,5,12-tetraone is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 21828-23-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,2 and 8 respectively; the second part has 2 digits, 2 and 3 respectively. Calculate Digit Verification of CAS Registry Number 21828-23: (7*2)+(6*1)+(5*8)+(4*2)+(3*8)+(2*2)+(1*3)=99 99 % 10 = 9 So 21828-23-9 is a valid CAS Registry Number.