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55850-54-9

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55850-54-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 55850-54-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,8,5 and 0 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 55850-54:
(7*5)+(6*5)+(5*8)+(4*5)+(3*0)+(2*5)+(1*4)=139
139 % 10 = 9
So 55850-54-9 is a valid CAS Registry Number.

55850-54-9Downstream Products

55850-54-9Relevant academic research and scientific papers

Photochromic behaviour of Bis[4-(N,N-dimethylamino)phenyl]-substituted 3H-naphtho[2,1-b]pyran and 2H-1-Benzopyran

Harie, Guenaelle,Samat, Andre,Guglielmetti, Robert,De Keukeleire, Denis,Saeyens, Wim,Van Parys, Inge

, p. 3075 - 3078 (1997)

The photochromic behaviour of 3,3-bis[4-(N,N-dimethylamino)phenyl]-3H-naphtho[2,1 -b]pyran (2) and 2,2-bis[4-(N,N-dimethylamino)phenyl]-2H-1 -benzopyran (3) has been studied by flash photolysis and compared to 3,3-diphenyl-3H-naphtho[2,1 -b]pyran (i) in order to delineate effects due to the N,N-dimethylamino groups.

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