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21631-82-3

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21631-82-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21631-82-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,6,3 and 1 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21631-82:
(7*2)+(6*1)+(5*6)+(4*3)+(3*1)+(2*8)+(1*2)=83
83 % 10 = 3
So 21631-82-3 is a valid CAS Registry Number.

21631-82-3Downstream Products

21631-82-3Relevant articles and documents

Pulsatile release from pH triggered imidazoline switchable surfactant liposomes

Hegh, Dylan Y.,Mackay, Sean M.,Tan, Eng Wui

, p. 56859 - 56866 (2016/07/07)

The incorporation of an imidazoline (IDZ) based switchable surfactant into the lipid membrane of a liposome produces a system that can be triggered to release its solute upon pH change. However, unlike traditional pH-triggered controlled release systems, IDZ-liposomes are capable of undergoing multiple triggering events, resulting in solute release in a pulsatile manner. Furthermore near-total release can be achieved incrementally with temporal control. A mechanism for this reversible behaviour is also proposed, and dependence on the physical properties of the surfactant is discussed.

Rapid Synthesis and Interconversions of Fatty 4,5-Dihydroimidazoles and Fatty 1,4,5,6-Tetrahydropyrimidines. Thermal Cyclizations of Fatty Amides Involving Phenyl Phosphorodiamidate

Butler, Richard N.,Thornton, John D.,O'Regan, C.B.

, p. 2197 - 2200 (2007/10/02)

Brief heating of ethane-1,2- and propane-1,3-bis-fatty amides at 235-250 deg C with phenyl phosphorodiamidate gave routes to high yields of 2-fatty alkyl-4,5-dihydroimidazoles and 1,4,5,6-tetrahydropyrimidines.Ready interconversions of fatty dihydroimidazoles and tetrahydropyrimidines, involving diamine exchange with solvent, were observed on brief heating of these materials in ethylenediamine and trimethylenediamine as solvents.

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