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128924-05-0

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128924-05-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128924-05-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,2 and 4 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128924-05:
(8*1)+(7*2)+(6*8)+(5*9)+(4*2)+(3*4)+(2*0)+(1*5)=140
140 % 10 = 0
So 128924-05-0 is a valid CAS Registry Number.

128924-05-0Downstream Products

128924-05-0Relevant articles and documents

Nucleophilic Substitution of Nitrite in Nitrobenzenes, Nitrobiphenyls and Nitronaphthalenes

Effenberger, Franz,Koch, Markus,Streicher, Willi

, p. 163 - 173 (2007/10/02)

Aromatic compounds, accessible only by multistep procedures, can be synthesized easily by nucleophilic substitution of nitrite in nitrobenzenes, nitrobiphenyls, and nitronaphthalines.Thus, meta-substituted phenols 3, 4, and 7 are obtained from 1,3-dinitrobenzene (1) and meta-substituted nitrobenzenes 6, as well as 3,5-disubstituted phenols 10 and 5-substituted resorcinol derivatives 11 from 3,5-disubstituted nitrobenzenes 9.The unsymmetrically substituted nitrobiphenyls 13, 15, 17, 19, 23, 24, and 26 are also available by nitrite exchange from the corresponding easily accessible dinitrobiphenyls 16, 18, 20, 22, and 25.A nitrite exchange with nucleophiles is easily possible in the 1,5-disubstituted naphthalenes 29, 34, while in the case of the 1,8-disubstituted naphthalenes 31, 36 only the chloro derivative 36 undergoes this exchange under much stronger conditions in low yield.

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