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51887-37-7

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51887-37-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51887-37-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,8,8 and 7 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 51887-37:
(7*5)+(6*1)+(5*8)+(4*8)+(3*7)+(2*3)+(1*7)=147
147 % 10 = 7
So 51887-37-7 is a valid CAS Registry Number.

51887-37-7Relevant articles and documents

Substituent Constants of the Pyrazol, 1,2,3-Triazol, Benzotriazol, and Naphthotriazol Group

Sachweh, Volker,Langhals, Heinz

, p. 1627 - 1639 (2007/10/02)

The synthesis of benzoic acids with the title substituents in p- and m-position (15, 13, 11, 9) and their ethyl and methyl esters is described.The ?p and ?m values of the substituents obtained by alkaline hydrolysis of the esters in ethanol/water and methylcellosolve/water demonstrate an inductive electron withdrawing and a mesomer electron donating effect of these groups which are important for dye chemistry.

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