21901-41-7

21901-41-7 structure

Name: 2-Hydroxy-4-methyl-5-nitropyridine
Chemical Name: 4-methyl-5-nitro-1H-pyridin-2-one
CAS Number: 21901-41-7
Molecular Formula: C₆H₆N₂O₃
Molecular Weight: 154.123
Catalog: Pharmaceutical intermediate Heterocyclic compound Pyridine compound Hydroxypyridine
Create Date: 2018-12-11 00:57:58
Modify Date: 2025-08-23 20:12:06

Name	4-methyl-5-nitro-1H-pyridin-2-one
Synonyms	2-Hydroxy-5-Nitro-4-Methyl Pyridine 2-Pyridinol, 4-methyl-5-nitro- 4-Méthyl-5-nitro-2(1H)-pyridinone 4-Methyl-5-nitro-2-pyridone MFCD00010690 2-Hydroxy-5-nitro-4-methyl-pyridin 4-methyl-5-nitropyridin-2-ol 2-Hydroxy-4-methyl-5-nitro-pyridin 2-Hydroxy-5-nitro-4-picoline 5-Nitro-4-picolin-2-ol 4-Methyl-5-nitro-2(1H)-pyridinon 4-Methyl-5-nitro-2(1H)-pyridinone 4-methyl-5-nitro-2-hydroxypyridin 2-Hydroxy-4-methyl-5-nitropyridine 4-Methyl-5-nitro-2-pyridinol

Symbol	GHS07
Signal Word	Warning
Hazard Statements	H315-H319-H335
Precautionary Statements	P261-P305 + P351 + P338
Personal Protective Equipment	dust mask type N95 (US);Eyeshields;Gloves
Hazard Codes	Xn:Harmful;
Risk Phrases	R20/21/22;R36/37/38
Safety Phrases	S26-S37/39-S36/37/39
RIDADR	2811
WGK Germany	3
Packaging Group	III
Hazard Class	6.1
HS Code	2933399090

6635-90-1

~84%

21901-41-7

Literature: Phenex Pharmaceuticals AG Patent: EP1894924 A1, 2008 ; Location in patent: Page/Page column 33 ;

21901-40-6

~62%

21901-41-7

Literature: Beijing Yiling Bioengineering Co., Ltd. Patent: EP2366691 A1, 2011 ; Location in patent: Page/Page column 13 ;

695-34-1

21901-41-7

Literature: Journal of the Chemical Society, , p. 2448,2455

695-34-1

21901-41-7

21901-18-8

Literature: Journal of Fluorine Chemistry, , vol. 132, # 8 p. 541 - 547

HS Code	2933399090
Summary	2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%