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2-(4-Fluoro-phenyl)-1,9b-dihydro-5-oxa-3,3a-diaza-cyclopenta[a]naphthalene-4-thione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

138840-98-9

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138840-98-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138840-98-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,8,4 and 0 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 138840-98:
(8*1)+(7*3)+(6*8)+(5*8)+(4*4)+(3*0)+(2*9)+(1*8)=159
159 % 10 = 9
So 138840-98-9 is a valid CAS Registry Number.

138840-98-9Relevant academic research and scientific papers

Tetrachloro-o-benzoquinone in Organic Synthesis: A Novel Synthetic Route to Pyrazolobenzoxazines and 5,7-Disubstituted-4-hydroxycoumarins

Nawwar, Galal A. M.

, p. 3139 - 3155 (2007/10/02)

A novel synthesis of dihydropyrazolobenzoxazines and their corresponding pyrazolobenzoxazines utilizing tetrachloro-o-benzoquinone - as a dehydrogenating agent - is described.Also, this simple method of dehydrogenation succeeds in

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