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40492-41-9

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40492-41-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40492-41-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,4,9 and 2 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 40492-41:
(7*4)+(6*0)+(5*4)+(4*9)+(3*2)+(2*4)+(1*1)=99
99 % 10 = 9
So 40492-41-9 is a valid CAS Registry Number.

40492-41-9Relevant articles and documents

Synthesis of 2-acetyl-5,8-dihydro-1,4-dihydroxy-3-methyl naphthalene: a product from the isomerisation of diels-alder adducts of both 5-methyl- and 6-methyl-2-acetyl-1,4-benzoquinone with 1,3-butadiene

Ahmad, Faujan B. H.,Malcolm Bruce

, p. 1263 - 1271 (1996)

2-Acetyl-5,8-dihydro-1,4-dihydroxy-3-methyl-naphthalene was synthesised via Diels-Alder addition of 2-acetyl-3-methyl-1,4-benzoquinone to buta-1,3-diene followed by enolisation. It was identical with material obtained by pyridine-induced acetyl migration

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