543-54-4

Basic information

• Product Name: PYRIDINE SULFATE
• Synonyms: pyridine,sulfate(1:1);PYRIDINE SULFATE;pyridinium hydrogen sulphate;pyridine heMisulfate
• CAS NO: 543-54-4
• Molecular Formula: C₅H₆N*HO₄S
• Molecular Weight: 256.28
• EINECS: 208-845-9
• Mol File: 543-54-4.mol
• Article Data: 11

Chemical Properties

• Melting Point: 93 °C
• Boiling Point: 115.3°Cat760mmHg
• Flash Point: 20°C
• Appearance: /
• Density: 0.956g/cm³
• Vapor Pressure: 22.8mmHg at 25°C
• CAS DataBase Reference: PYRIDINE SULFATE(CAS DataBase Reference)
• NIST Chemistry Reference: PYRIDINE SULFATE(543-54-4)
• EPA Substance Registry System: PYRIDINE SULFATE(543-54-4)

Safety Data

• Hazardous Substances Data: 543-54-4(Hazardous Substances Data)

Usage

General Description

PYRIDINE SULFATE is a chemical compound with the molecular formula C5H5NSO4. It is a white crystalline solid that is soluble in water and has a strong odor. It is primarily used as a catalyst in organic synthesis and as a reagent in the production of pharmaceuticals and agrochemicals. PYRIDINE SULFATE is also commonly used in the synthesis of dyes, rubber accelerators, and plastics. It is considered to be a hazardous substance and should be handled with care due to its toxic and irritant properties.

InChI:InChI=1/C5H5N.H2O4S/c1-2-4-6-5-3-1;1-5(2,3)4/h1-5H;(H2,1,2,3,4)/p-2

Upstream product

• 110-86-1 pyridine 
• 7789-78-8 calcium hydride 
• 7783-80-4 tellurium hexafluoride 
• 14797-71-8 ¹⁸O-labeled water 

Relevant articles and documents

Facile synthesis of fructone from ethyl acetoacetate and ethylene glycol catalyzed by SO3H-functionalized Bronsted acidic ionic liquids

SO3H-functionalized Bronsted acidic ionic liquids (BAILs) were synthesized and utilized as highly efficient catalysts for the production of fructone via the acetalization reaction of ethyl acetoacetate with ethylene glycol. In comparison with conventional H2SO4 and cation exchange resins, the BAILs N-(4-sulfonic acid) butyl triethylammonium hydrogensulfate ([BSEt3N][HSO4]) of strong acidities exhibited excellent catalytic activities. The effects of various parameters such as different BAILs, reaction temperature, catalyst dosage, and molar ratio of the reactants on the conversion of ethyl acetoacetate were investigated in detail. The experimental results indicated that the catalytic performance of BAILs were closely related to their Hammett acidities. Moreover, it was found that [BSEt3N][HSO4] could be also recovered easily and used repetitively six times without obvious decline in activity and quantity, showing great potential application in industry. This journal is the Partner Organisations 2014.

Effect of the active phase-support interaction on the electronic, thermal and catalytic properties of [H–Pyr]+[HSO4]?/support (support = rice husk ash; corundum)

Influence of the surface active phase-support interaction on the electronic, thermal and catalytic performance of pyridinium hydrogen sulfate ([H–Pyr]+[HSO4, PHS]?) ionic liquid immobilized by a wetness impregnation method on rice husk ash (RHA) and corundum (Al-NA) carriers has been investigated in the current work. For that purpose, both the developed supports and the corresponding catalysts (PHS/Al-NA and PHS/RHA) were characterized in details by means of analytical methods such as N2 adsorption-desorption measurements, X-ray diffraction, X-ray photoelectron spectroscopy, spectroscopy in the ultraviolet and visible regions, infrared spectroscopy and thermogravimetric analysis. To compare the catalytic activity of PHS/Al-NA and PHS/RHA, a process of butyl acetate synthesis was applied as a test reaction. The physicochemical characterization revealed that the active phase-support interaction in the case of PHS/RHA catalyst is stronger than that between PHS phase and Al-NA. Based on this, the catalytic performance of PHS/RHA sample (expressed by substrate conversion degree) in the reaction of acetic acid esterification with butanol was found to be more pronounced with respect to that of Al-NA supported pyridinium hydrogen sulfate.

Pyridinium protic ionic liquids: Effective solvents for delignification of wheat straw

Lignocellulosic biomass covers a vast area of the globe and contains many valuable components that can be envisaged for numerous renewable products. The valorization of these components is hindered by its cumbersome isolation due to the recalcitrant nature of lignocellulosic biomass. Acidic ionic liquids (AILs) have emerged in this field as effective pretreatment solvents. The unique property of disrupting lignin-cellulose-hemicellulose bonds and dissolving lignin makes these ILs significant for the separation of lignin and cellulosic constituents. In this study three protic ionic liquids based on pyridinium cation and hydrogen sulfate anion (HSO4?) have been synthesized; [PyH][HSO4] (IL1), [PyH][HSO4. (H2SO4)] (IL2), and [PyH][HSO4 . (H2SO4)3] (IL3) and utilized for the isolation of lignin from wheat straw. The synthesized ILs were characterized by NMR and FTIR analyses. The lignin yield was optimized with respect to reaction temperature, time, biomass loading, and type of IL. The lignin removal efficacy of the ionic liquid with highest ratio of acid [PyH][HSO4.(H2SO4)3] (IL3) is indicated by high delignification (79%) and lignin recovery (77%) under mild conditions (60 °C, 2 h). The cellulose rich material (CRM) and isolated lignin were characterized by FTIR, SEM, TGA, GPC, and HSQC NMR to assess their structure, molecular weight and stability. The cellulosic part was further hydrolyzed enzymatically to evaluate the capability of the recovered pulp to generate glucose. An appreciable yield of reducing sugars (85%) substantiates high lignin removal.