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1240519-76-9

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1240519-76-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1240519-76-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,0,5,1 and 9 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1240519-76:
(9*1)+(8*2)+(7*4)+(6*0)+(5*5)+(4*1)+(3*9)+(2*7)+(1*6)=129
129 % 10 = 9
So 1240519-76-9 is a valid CAS Registry Number.

1240519-76-9Downstream Products

1240519-76-9Relevant articles and documents

Colorimetric sensing of Cu2+ using a cyclodextrin-dye rotaxane

Park, Jong S.,Jeong, Sooyeon,Dho, Seongkook,Lee, Myungwon,Song, Chungkun

, p. 49 - 54 (2010)

A dye rotaxane having 8-hydroxyquinoline as coupling component was prepared in the presence of α-cyclodextrin and its structure identified using NMR. The dye rotaxane displayed high color strength regardless of the solvent used and responded to changes in pH based on tautomeric equilibrium, without any interference by the cyclodextrin macrocycle. Compared to the non-rotaxanated forms, the dye rotaxane displayed a characteristic spectral response to the presence of Cu2+ which was attributed to the formation of?a polymeric, metal-dye rotaxane complex which was of high solubility because of the presence of cyclodextrin. Thus, this approach can clearly be used as a facile and efficient sensor for copper ions.

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