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74058-13-2

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74058-13-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74058-13-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,0,5 and 8 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74058-13:
(7*7)+(6*4)+(5*0)+(4*5)+(3*8)+(2*1)+(1*3)=122
122 % 10 = 2
So 74058-13-2 is a valid CAS Registry Number.

74058-13-2Relevant articles and documents

Thermochemistry of branched ethers: Experimental study of chemical equilibrium in the reacting system of tert-amyl alkyl ether synthesis

Verevkin, Sergey P.

, p. 576 - 581 (2007/10/03)

The chemical equilibrium of the reactive systems (alkanol + methylbutenes ? alkyl tert-amyl ether) with the following alkyl substituents: ethyl, propyl, butyl, iso-propyl, sec-butyl, and cyclohexyl, were studied in the liquid phase. Reactions were investigated in the screwed vials in the temperature range (298 to 393) K, and a cation exchanger Amberlist 15 was used as heterogeneous catalyst. Enthalpies of reactions ΔrH m° of teri-amyl alkyl ethers synthesis in the liquid phase were obtained from the temperature dependence of the equilibrium constants and used to derive standard enthalpies of formation, ΔfH m°(1), of tert-amyl alkyl ethers. For the sake of comparison, these enthalpies of formation have been calculated using improved Benson's increments. Calculated values are in close agreement with those from thermochemical measurements.

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