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140440-05-7

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140440-05-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 140440-05-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,0,4,4 and 0 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 140440-05:
(8*1)+(7*4)+(6*0)+(5*4)+(4*4)+(3*0)+(2*0)+(1*5)=77
77 % 10 = 7
So 140440-05-7 is a valid CAS Registry Number.

140440-05-7Downstream Products

140440-05-7Relevant articles and documents

Ring-Chain Transformations, IX. Synthesis and Ring-Chain Tautomerism of 2-(ω-Aminoalkyl)-1,3,4-thiadiazoles

Radics, Ute,Liebscher, Juergen,Ziemer, Burkhard,Rybakov, Viktor

, p. 1389 - 1396 (2007/10/02)

Thiohydrazide compounds 1 react with lactam acetals 2 or lactim ethers 3 by condensation giving unusual zwitterionic tautomers 5 of lactam thioacylhydrazones 4.These compounds 5 form mixtures of tautomers in neutral solution.In acidic solution, however, most of them undergo a reversible ring-chain transformation to novel 2-(ω-aminoalkyl)-1,3,4-thiadiazole salts 9.Alkylation of zwitterionic thioacylamidrazones 5 gives S-alkylation products 6.

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