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1-(4-phenylthiazol-2-ylazo)-naphthalen-2-ol is a complex organic compound with the molecular formula C21H15N3OS. It is characterized by a naphthalene core, which is a fused ring system consisting of two benzene rings, with a hydroxyl group (-OH) attached to the second carbon atom. The compound features a 4-phenylthiazol-2-ylazo group, which is a heterocyclic azo dye moiety, attached to the first carbon atom of the naphthalene. This azo group consists of a thiazol ring (a five-membered ring with one sulfur atom and one nitrogen atom) and a phenyl ring (a benzene ring) connected through an azo group (-N=N-). The compound is known for its potential applications in various fields, such as analytical chemistry and as a dye, due to its unique chemical structure and properties.

3257-22-5

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3257-22-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3257-22-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,2,5 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 3257-22:
(6*3)+(5*2)+(4*5)+(3*7)+(2*2)+(1*2)=75
75 % 10 = 5
So 3257-22-5 is a valid CAS Registry Number.

3257-22-5Relevant academic research and scientific papers

Formation of azolo [1,2,4]triazinium salts by reaction of heterocyclic-substituted 1-azo-naphthalen-2-ols with strong acids

Yu, Xiuling,Hartmann, Horst

, p. 501 - 508 (2014)

By reaction of heterocyclic-substituted 1-azo-naphth-2-ols with the Vilsmeier reagent or with strong acids polycyclic azolo[1,2,4]triazinium salts are formed in good yields. The azolo[1,2,4] triazinium salts exhibit similar UV/Vis absorption properties as the starting azo compounds, but in contrast to those the fluorescence appears in the visible range.

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