4a-methoxy-9-phenyl-3,4,4a,5,6,7,9,9a-octahydro-2H-xanthene-1,8-dione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 55771-23-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,7,7 and 1 respectively; the second part has 2 digits, 2 and 3 respectively. Calculate Digit Verification of CAS Registry Number 55771-23: (7*5)+(6*5)+(5*7)+(4*7)+(3*1)+(2*2)+(1*3)=138 138 % 10 = 8 So 55771-23-8 is a valid CAS Registry Number.
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