5a,11a-cis-dimethyl-5a,5b,11a,11b-tetrahydro-β,β'-cis-binaphthylene-5,6,11,12-tetrone is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 22856-47-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,8,5 and 6 respectively; the second part has 2 digits, 4 and 7 respectively. Calculate Digit Verification of CAS Registry Number 22856-47: (7*2)+(6*2)+(5*8)+(4*5)+(3*6)+(2*4)+(1*7)=119 119 % 10 = 9 So 22856-47-9 is a valid CAS Registry Number.