Pyridine, an organic compound with the chemical formula C5H5N, is a six-membered heterocyclic compound containing a nitrogen heteroatom. It can be regarded as a compound in which one (CH) in the benzene molecule is substituted by N, so it is also called nitrobenzene. It is a colorless or slightly yellow liquid with a stench.
Foreign name: pyridine
Alias: Azabenzene
Chemical formula: C5H5N
Molecular weight: 79.102
CAS login number: 110-86-1
EINECS accession number: 203-809-9
Melting point: -41.6 ℃
Boiling point: 15.3℃
Water soluble: Soluble
Density: 0.983 g/cm³
Exterior: Colorless liquid
Flash point: 20 ℃ (closed)
Application: Used in the manufacture of vitamins, sulfonamides, pesticides and plastics, etc.
Security description: S7; S16; S22; S24/25; S26; S28; S36/37/39; S38; S45; S61
Hazard Symbols: F; Xn
Hazard description: R11; R20/21/22
UN Dangerous Goods Number: 1282
Physical properties:
Melting point: -41.6℃
Boiling point: 115.3℃
Flash point: 20℃
Density: 0.983g/cm3
Ignition temperature: 482℃
Upper explosion limit (V/V): 12.4%
Lower explosion limit (V/V): 1.7%
Critical temperature (℃): 346.85
Critical pressure (MPa): 6.18
Refractive index: 1.509 (20℃)
Appearance: colorless liquid
Solubility: Miscible with water, alcohol, ether, petroleum ether, benzene, oil and other solvents
Chemical properties:
Pyridine and its derivatives are more stable than benzene, and their reactivity is similar to that of nitrobenzene. Typical aromatic electrophilic substitution reactions occur at the 3 and 5 positions, but the reactivity is lower than that of benzene, and nitration, halogenation, sulfonation and other reactions are generally not easy to occur. Pyridine is a weak tertiary amine that can form water-insoluble salts with various acids (picric acid or perchloric acid, etc.) in ethanol solution. The pyridine used in industry contains about 1% of 2-methylpyridine, so it can be separated from its homologues by taking advantage of the difference in salt-forming properties. Pyridine can also form crystalline complexes with various metal ions. Pyridine is easier to reduce than benzene, such as reducing to hexahydropyridine (or piperidine) under the action of metal sodium and ethanol. Pyridine reacts with hydrogen peroxide and is easily oxidized to N-pyridine oxide.
Application
It is used in the manufacture of vitamins, sulfonamides, pesticides and plastics; it can also be used as an alkaline solvent, and it is also an excellent solvent for deacidification and acylation reactions; it can also be used as a carbonyl group for polymerization, oxidation, and acrylonitrile. It can also be used as a catalyst for chemical reactions, etc.; it can also be used as a silicone rubber stabilizer, a raw material for anion exchange membranes, etc.
3-Bromopyridine,4-Methoxypyridine,Intermediates 2-Chloro-3-formyl-6-picoline,5-Bromo-2-methyl-3-nitropyridine Fuxin Custchem Fine Chemical Co., Ltd. , https://www.custchemvip.com
1.Specification:
1. Brass casting
2. Material: Brass, copper or other metal
3. Process: Casting &Â CNC machining
4. Surface treatment: Powder coating or polishing, also can be according to client's requirement.
5. Special design available.
We can supply any kinds of casting products according to your drawings or sample. High-quality, competitive price, also we accept smaller order.
Chemical components of material can be supplied according to cleint's requirements.
Any of your information will be taken full care by us.
Delivery time: 30~35 days after 30% down payment received.
2. Packing:
A>Seger packing: Carton box+wooden case/pallet/iron cage
B>As pre client's special requirement
3. Our Service:
*A "bespoke" service to make castings and forgings to customers specific requirements with drawings, samples
*Market-oriented, different grades of products geared to the needs of different customers
*Advance equipment, professional technology and serious inspection procedure to ensure good quality
*In-time delivery will always satisfy customers" needs
*Best after-sale service all the time for a long trade cooperation term
4. FAQ:
Q1: What's the lead time?
A1: In general, the lead time is about 25~40 days for opening new moulds and mass production.
Q2: What file formats does Seger accept for drawings:
A2: The company ca accept a range of formats for drawings, but the main ones are detailed below: 2-D PDF AND TIFF 3-D STL, IGES, STEP, Solidworks, etc
Q3: Is it possible to visit seger to view it's manufacturing process?
A3: We are extremely proud of our facility and existing customers to visit our company. We think you will be impressed by us, as well as the warm welcome from our friendly, experienced team.
For more details,kindly contact us.
Contact Person:Ms Lisa Nie
Mobile:86-15092433921
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Model NO.: SE-299
Surface Roughness: Ra1.6
Machining Tolerance: as Required
Standard: ASTM
Certification: ISO 9001:2000
Technical: CNC Maching
Custom Design: Ok
MOQ: 100PCS
Lead Time: 30~35 Days
Trademark: Seger
Transport Package: Carton Box + Pallet
Specification: ISO2000
Origin: Shandong, China
HS Code: 8401309000
Polishing cast bronze brass copper casting products