1,3,4,1',3',4'-hexamethyl-1,5,1',5'-tetrahydro-5,5'-(4,6-dimethyl-m-phenylenedimethylene)-bis-pyrrol-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 69136-40-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,1,3 and 6 respectively; the second part has 2 digits, 4 and 0 respectively. Calculate Digit Verification of CAS Registry Number 69136-40: (7*6)+(6*9)+(5*1)+(4*3)+(3*6)+(2*4)+(1*0)=139 139 % 10 = 9 So 69136-40-9 is a valid CAS Registry Number.
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