(5Z,10Z,14Z,19Z)-21-(2,2-Diphenyl-vinyl)-5,10,15,20-tetraphenyl-porphyrin is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 83219-59-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,2,1 and 9 respectively; the second part has 2 digits, 5 and 9 respectively. Calculate Digit Verification of CAS Registry Number 83219-59: (7*8)+(6*3)+(5*2)+(4*1)+(3*9)+(2*5)+(1*9)=134 134 % 10 = 4 So 83219-59-4 is a valid CAS Registry Number.
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