139277-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139277-57-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,2,7 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 139277-57:
(8*1)+(7*3)+(6*9)+(5*2)+(4*7)+(3*7)+(2*5)+(1*7)=159
159 % 10 = 9
So 139277-57-9 is a valid CAS Registry Number.
139277-57-9Relevant articles and documents
Synthesis of 4-(1H-Azol-1-ylmethyl)benzohydrazides and their acyclic and heterocyclic derivatives
Osyanin,Purygin,Belousova
, p. 111 - 117 (2007/10/03)
4-(1H-Azol-1-ylmethyl)benzohydrazides were prepared from methyl 4-(bromomethyl)benzoate, azoles, and hydrazine hydrate. Reactions of 4-(1H-imidazol-1-ylmethyl)benzohydrazide with carbonyl compounds gave hydrazones whose tautomerism was studied. From the h