| Identification | More | [Name]
4-Hydroxypyridine | [CAS]
626-64-2 | [Synonyms]
4-HYDROXYPYRIDINE
4-PYRIDINOL
PYRIDIN-4-OL
TIMTEC-BB SBB000030
gamma-Hydroxypyridine
4-Hydroxypyridine, tech., 90%
Hydroxypyridine(Gamma-)
4-Hydroxypyridine,97%
4-Hydroxypyride
4HYDROXYPRIDINE
4-HYDROXYPYRIDINE ( 4-PYRIDINOL )
2-HYDROXY PYRIDINE PYRIDIN-2-OL
4-HYDROXY PYRIDINE PYRIDIN-4-OL
4-HYDROXYPYRIDINE pract
4-Pyridinol, 4-Pyridone
1H-Pyridin-4-ol | [EINECS(EC#)]
210-958-3 | [Molecular Formula]
C5H5NO | [MDL Number]
MFCD00006419 | [Molecular Weight]
95.1 | [MOL File]
626-64-2.mol |
| Chemical Properties | Back Directory | [Appearance]
beige to light brown powder or chunks | [Melting point ]
150-151 °C (lit.) | [Boiling point ]
230-235 °C/12 mmHg (lit.) | [density ]
1.1418 (rough estimate) | [refractive index ]
1.5939 (estimate) | [Fp ]
221 °C
| [storage temp. ]
Keep in dark place,Inert atmosphere,Room temperature | [solubility ]
DMSO (Slightly), Methanol (Slightly) | [form ]
Powder or Chunks | [pka]
3.2(at 20℃) | [color ]
Beige to light brown | [Water Solubility ]
Soluble | [Detection Methods]
HPLC,NMR | [BRN ]
105800 | [InChIKey]
GCNTZFIIOFTKIY-UHFFFAOYSA-N | [LogP]
-1.300 (est) | [CAS DataBase Reference]
626-64-2(CAS DataBase Reference) | [NIST Chemistry Reference]
4-Pyridinol(626-64-2) | [EPA Substance Registry System]
626-64-2(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection . | [WGK Germany ]
3
| [RTECS ]
UU7701450
| [F ]
3-8-10 | [Hazard Note ]
Harmful/Irritant | [TSCA ]
Yes | [HazardClass ]
IRRITANT | [HS Code ]
29333990 |
| Raw materials And Preparation Products | Back Directory | [Raw materials]
4-ALLYLOXYPYRIDINE-->4-Methoxypyridine-->4-(BENZYLOXY)PYRIDINE-->4-HYDROXYPYRIDINE-1-OXIDE-->N-(4-Pyridyl)pyridinium chloride hydrochloride-->4-Iodopyridine-->2,3-DIMETHYL-1,3-BUTADIENE-->Pyridine-4-boronic acid | [Preparation Products]
4-Dimethylaminopyridine-->3,4-Diaminopyridine-->2,4-DICHLORO-5-NITROPYRIDINE-->3-AMINO-4-METHOXYPYRIDINE-->4-Chloro-3-nitropyridine-->3,4,5-TRIBROMOPYRIDINE-->2,3,4,5,6-PENTABROMOPYRIDINE-->4-Amino-3-nitropyridine-->3,5-DibroMo-4-Methoxy-pyridine-->4-chloropyridine |
| Hazard Information | Back Directory | [Description]
4-Hydroxypyridine, available from pyridylpyridinium chloride hydrochloride, is the substrate for diodone and its n-propyl ester, propyliodone. 4-Hydroxypyridine (4-HP) is a non-nucleophilic analog of the product phenol found to bind specifically to and stabilize the aminoacrylate intermediate. When 4-HP is added to Tyrosine phenol-lyase (TPL) reactions, an absorption peak at 340 nm is observed. The formation of the 340 nm peak correlates with the decay of the quinonoid intermediate peak at 505 nm, with a clean isosbestic point, and the observed rate constants show an inverse dependence on the concentration of 4-HP. These results confirm that the observed peak at 340 nm is due to the formation of the amino acrylate intermediate[1-2]. | [Chemical Properties]
Beige crystalline powder | [Uses]
4-Hydroxypyridine was used in the synthesis of (Ag3MoO3F3) (Ag3MoO4)Cl by hydro(solvato)thermal methods. It was used as model compound to study the natural photodegradation of representative aquatic environmental contaminants. | [Definition]
ChEBI: A monohydroxypyridine that is pyridine in which the hydrogen at position 4 has been replaced by a hydroxy group. | [Purification Methods]
Crystallise 4-pyridone from H2O or wet CHCl3 as the monohydrate. It loses H2O on drying in vacuo over H2SO4. Store it over KOH because it is hygroscopic.[Beilstein 21 III/IV 446, 21/7 V 152.] | [References]
[1] Yates, F. S. “2.09 – Pyridines and their Benzo Derivatives: (vi) Applications.”Comprehensive Heterocyclic Chemistry 2 (1984): 511-524.
[1] Robert S Phillips, Olivia Bauer. “Characterization of aminoacrylate intermediates of pyridoxal-5’-phosphate dependent enzymes.” Methods in enzymology 685 (2023): 199–224. |
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