3,5a,9-trimethyl-3a,5,5a,9,9a,9b-hexahydronaphtho[1,2-b]furan-2,8(3H,4H)-dione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 39813-41-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,8,1 and 3 respectively; the second part has 2 digits, 4 and 1 respectively. Calculate Digit Verification of CAS Registry Number 39813-41: (7*3)+(6*9)+(5*8)+(4*1)+(3*3)+(2*4)+(1*1)=137 137 % 10 = 7 So 39813-41-7 is a valid CAS Registry Number.