(+/-)-(5ar,5bt,10bt,10cc)-5a,5b,10b,10c-tetrahydro-dibenzo[d,d']cyclobuta[1,2-b;4,3-b']dithiophene-5,5,6,6-tetraoxide is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 25558-18-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,5,5 and 8 respectively; the second part has 2 digits, 1 and 8 respectively. Calculate Digit Verification of CAS Registry Number 25558-18: (7*2)+(6*5)+(5*5)+(4*5)+(3*8)+(2*1)+(1*8)=123 123 % 10 = 3 So 25558-18-3 is a valid CAS Registry Number.