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138841-11-9

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138841-11-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138841-11-9 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 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 138841-11:
(8*1)+(7*3)+(6*8)+(5*8)+(4*4)+(3*1)+(2*1)+(1*1)=139
139 % 10 = 9
So 138841-11-9 is a valid CAS Registry Number.

138841-11-9Downstream Products

138841-11-9Relevant articles and documents

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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