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23996-40-9

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23996-40-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23996-40-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,9,9 and 6 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 23996-40:
(7*2)+(6*3)+(5*9)+(4*9)+(3*6)+(2*4)+(1*0)=139
139 % 10 = 9
So 23996-40-9 is a valid CAS Registry Number.

23996-40-9Downstream Products

23996-40-9Relevant articles and documents

Environmentally benign approach to imidazole 2-thiones

Kidwai, Mazaahir,Kukreja, Shuchi,Rastogi, Shweta,Singhal, Kavita

, p. 1549 - 1553 (2008/09/19)

An ecofriendly synthesis of some novel 1,4,5-triarylimidazole-2-thiones/l, 3,4,5-tetraarylimidazole-2-thiones is described. The reaction involves condensation of benzoin with various readily accessible N-substituted thioureas/N,N'-disubstituted thioureas under microwave over recyclable inorganic solid support. This methodology eliminates the usage of solvent and external catalyst in the reaction step and reduces the reaction time from hours to minutes along with remarkable yield enhancement. In addition versatility of various solid supports as catalyst is also studied.

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