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4909-53-9

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4909-53-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4909-53-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,9,0 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 4909-53:
(6*4)+(5*9)+(4*0)+(3*9)+(2*5)+(1*3)=109
109 % 10 = 9
So 4909-53-9 is a valid CAS Registry Number.

4909-53-9Relevant articles and documents

Bis-morpholinophosphorylchloride, a novel reagent for the conversion of primary amides into nitriles

Rao, P. Purnachandra,Nowshuddin, Shaik,Jha, Anjali,Rao, B. Leela Maheswara,Divi, Murali K.,Rao

supporting information, (2021/01/21)

Bis-morpholinophosphorylchloride (Bmpc), in the presence of a base, is an efficient dehydrating agent for both aromatic and aliphatic primary amides, and gives corresponding nitriles under mild conditions in god yields and purity. During the reaction the enantiomeric integrity remains intact.

Identification of asparaginyl and glutaminyl residues in endo position in peptides by dehydration-reduction.

Ressler,C.,Kashelikar,D.V.

, p. 2025 - 2035 (2007/10/04)

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