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21203-68-9 Usage


2-Methyl-5-nitropyridine is used as pharmaceutical intermediate.

Check Digit Verification of cas no

The CAS Registry Mumber 21203-68-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,0 and 3 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 21203-68:
59 % 10 = 9
So 21203-68-9 is a valid CAS Registry Number.

21203-68-9 Well-known Company Product Price

  • Brand
  • (Code)Product description
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  • Alfa Aesar

  • (H61750)  2-Methyl-5-nitropyridine, 95%   

  • 21203-68-9

  • 5g

  • 402.0CNY

  • Detail
  • Alfa Aesar

  • (H61750)  2-Methyl-5-nitropyridine, 95%   

  • 21203-68-9

  • 25g

  • 1609.0CNY

  • Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017


1.1 GHS Product identifier

Product name 2-Methyl-5-nitropyridine

1.2 Other means of identification

Product number -
Other names Pyridine, 2-methyl-5-nitro-

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:21203-68-9 SDS

21203-68-9Relevant articles and documents

Nitropyrimidinones; synthetic equivalents of diformylamine and nitromalonaldehyde


, p. 1277 - 1280 (1997)

Reactions of two isomeric nitropyrimidinones with bidentate enolate anions were studied. When 3-methyl-5-nitropyrimidin-4(3H)-one (1) was employed, ring transformation proceeded to give pyridin-4(1H)-ones 3 functionalized at the 3- or 5-positions. This pyrimidin-4-one 1 behaved as an activated diformylamine HN(CHO)2. 1-Methyl-5-nitropyrimidin-2(1H)-one (2) afforded polyfunctionalized bicyclo[3.3.1]nonene derivatives 7 and 8 and/or p-nitrophenol derivatives 9. In this case, pyrimidin-2-one 2 acted as the synthetic equivalent of unstable O2NCH(CHO)2. These two nitropyrimidinones are valuable intermediates for the synthesis of polyfunctionalized compounds.

Tailor-made synthesis of N,N,2,6-tetrasubstituted 4-nitroanilines by three-component ring transformation of dinitropyridone

Le, Song Thi,Asahara, Haruyasu,Nishiwaki, Nagatoshi

supporting information, p. 1203 - 1206 (2015/03/04)

The ring transformation of dinitropyridone afforded various kinds of 2,6-disubstituted-4-nitroanilines upon treatment with aliphatic ketones in the presence of ammonium acetate as a nitrogen source, wherein dinitropyridone behaved as the synthetic equival

Nitrosation of aryl and heteroaryltrifluoroborates with nitrosonium tetrafluoroborate

Molander, Gary A.,Cavalcanti, Livia N.

experimental part, p. 4402 - 4413 (2012/06/18)

Organotrifluoroborates have emerged as an alternative to toxic and air- and moisture-sensitive organometallic species for the synthesis of functionalized aryl and heteroaryl compounds. It has been shown that the trifluoroborate moiety can be easily converted into a variety of different substituents in a late synthetic stage. In this paper, we disclose a mild, selective, and convenient method for the ipso-nitrosation of organotrifluoroborates using nitrosonium tetrafluoroborate (NOBF4). Aryl- and heteroaryltrifluoroborates were converted into the corresponding nitroso products in good to excellent yields. This method proved to be tolerant of a broad range of functional groups.

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