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132758-90-8

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132758-90-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 132758-90-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,2,7,5 and 8 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 132758-90:
(8*1)+(7*3)+(6*2)+(5*7)+(4*5)+(3*8)+(2*9)+(1*0)=138
138 % 10 = 8
So 132758-90-8 is a valid CAS Registry Number.

132758-90-8Upstream product

132758-90-8Downstream Products

132758-90-8Relevant articles and documents

Steric factors and stability of the complexes of pyridinecarboxylate ions with group IIA cations. A thermodynamic study

Aruga, Roberto

, p. 79 - 82 (2007/10/02)

Heats and entropies of complex formation of 2-pyridinecarboxylate and 2,6-pyridinedicarboxylate with Mg(II), Ca(II), Sr(II) and Ba(II) cations were determined by direct calorimetry, and using the stability constants in the literature.The measurements were carried out in aqueous solution at 25 deg C and I = 0.2 mol.l(-1) (NaNO3).Examination of the results shows that the cause of the comparatively high stability of the complexes of pyridinecarboxylic ligands with group IIA cations is enthalpic.This is probably due to the coplanar position of the pyridine ring and the carboxylic groups.This factor acts more strongly in the case of Ca, Sr and Ba than of Mg, probably for reasons connected with the cation dimension.The different order of stability of the Mg and Ca complexes with the present ligands is probably due to the same cause.

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