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64440-76-2

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64440-76-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 64440-76-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,4,4 and 0 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 64440-76:
(7*6)+(6*4)+(5*4)+(4*4)+(3*0)+(2*7)+(1*6)=122
122 % 10 = 2
So 64440-76-2 is a valid CAS Registry Number.

64440-76-2Relevant articles and documents

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Taylor et al.

, p. 736 (1978)

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Syntheses of labeled vitamers of folic acid to be used as internal standards in stable isotope dilution assays

Freisleben, Achim,Schieberle, Peter,Rychlik, Michael

, p. 4760 - 4768 (2007/10/03)

[2H4]Folic acid was synthesized by deuterating p-aminobenzoic acid, which was then coupled to glutamic acid and 6-formylpterin, Using [2H4]folic acid as starting component enabled the preparation of labeled vitamers tetrahydrofolate, 5-formyltetrahydrofolate, 5-methyltetrahydrofolate, and 10-formylfolate which were characterized by electrospray mass spectrometry and collision-induced dissociation. The mass spectrometric studies confirmed that the compounds could be used as internal standards in stable isotope dilution assays.

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