5,6,7,8-tetrachloro-(3ar,9ac)-3a,9a-dihydro-3H-benzo[5,6][1,4]dioxino[2,3-d]oxazol-2-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 65647-71-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,5,6,4 and 7 respectively; the second part has 2 digits, 7 and 1 respectively. Calculate Digit Verification of CAS Registry Number 65647-71: (7*6)+(6*5)+(5*6)+(4*4)+(3*7)+(2*7)+(1*1)=154 154 % 10 = 4 So 65647-71-4 is a valid CAS Registry Number.