1,6-diisopropylidene-4,4,9,9-tetramethyl-4,4a,9,9a-tetrahydro-bis[1,3]oxazino[3,4-a;3',4'-c]quinazoline-3,8-dione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 26641-41-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,6,6,4 and 1 respectively; the second part has 2 digits, 4 and 1 respectively. Calculate Digit Verification of CAS Registry Number 26641-41: (7*2)+(6*6)+(5*6)+(4*4)+(3*1)+(2*4)+(1*1)=108 108 % 10 = 8 So 26641-41-8 is a valid CAS Registry Number.