Pyridazine
Description Heterocyclic compound Synthesis and Structure- Product Name
- Pyridazine
- CAS No.
- 289-80-5
- Chemical Name
- Pyridazine
- Synonyms
- diazine;Pyridazin;PYRENE-1-CARBALDEHYDE;OIZINE;Orizine;o-diazine;yridazine;PYRIDAZINE;AKOS 92457;1,2-DIAZINE
- CBNumber
- CB5752911
- Molecular Formula
- C4H4N2
- Formula Weight
- 80.09
- MOL File
- 289-80-5.mol
Pyridazine Property
- Melting point:
- -8 °C (lit.)
- Boiling point:
- 208 °C (lit.)
- Density
- 1.103 g/mL at 25 °C (lit.)
- refractive index
- n20/D 1.524(lit.)
- Flash point:
- 185 °F
- storage temp.
- Inert atmosphere,Room Temperature
- pka
- 2.24(at 20℃)
- form
- Liquid
- color
- Clear yellow-brown
- Water Solubility
- MISCIBLE
- Merck
- 14,7969
- BRN
- 103906
- InChIKey
- PBMFSQRYOILNGV-UHFFFAOYSA-N
- CAS DataBase Reference
- 289-80-5(CAS DataBase Reference)
- NIST Chemistry Reference
- Pyridazine(289-80-5)
- EPA Substance Registry System
- Pyridazine (289-80-5)
Safety
- Hazard Codes
- Xn
- Risk Statements
- 36/37/38-22
- Safety Statements
- 23-24/25
- RIDADR
- NA 1993 / PGIII
- WGK Germany
- 3
- RTECS
- UR5267000
- F
- 8-10
- TSCA
- Yes
- HS Code
- 29339980
- Toxicity
- LD50 ipr-mus: 2650 mg/kg PBPHAW 1,542,65
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H227Combustible liquid
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- P57204
- Product name
- Pyridazine
- Purity
- 98%
- Packaging
- 5g
- Price
- $75.9
- Updated
- 2025/07/31
- Product number
- P57204
- Product name
- Pyridazine
- Purity
- 98%
- Packaging
- 50g
- Price
- $567
- Updated
- 2025/07/31
- Product number
- P0616
- Product name
- Pyridazine
- Purity
- >99.0%(GC)
- Packaging
- 5g
- Price
- $59
- Updated
- 2025/07/31
- Product number
- P0616
- Product name
- Pyridazine
- Purity
- >99.0%(GC)
- Packaging
- 25g
- Price
- $174
- Updated
- 2025/07/31
- Product number
- 286497
- Product name
- Pyridazine
- Packaging
- 25g
- Price
- $619
- Updated
- 2021/12/16
Pyridazine Chemical Properties,Usage,Production
Description
Pyridazine, sometimes called 1,2-diazine, is a six-membered ring containing two adjacent nitrogen atoms. Pyridazine is a privileged structure in medicinal chemistry and can be used as an isosteric replacement of phenyl or heteroaromatic rings. Pyridazines can improve the physiochemical properties of drug molecules by increasing their water solubility, participating as hydrogen bond acceptors, and have a high capacity to complex with targets due to their dipole moment. Pyridazine confers bioavailability, especially to the CNS, and can reduce toxicity. Pyridazine is a part of several drug molecules, and the pyradzine pharmacophore has led to a variety of pharmacologically active compounds.
Heterocyclic compound
Pyridazine refers to a heterocyclic azine compound containing a nitrogen hexaheterocyclic , it and pyrimidine, pyrazine are isomers of each other , it is insoluble in petroleum ether, soluble in methanol, ethanol and ether, and it can be miscible with water, benzene and dimethyl formamide immiscibility. Pyridazine is a weak base, which can form salts with picric acid, and hydrochloric acid; pyridazine is not prone to nucleophilic and electrophilic aromatic substitution reaction; it is stable to potassium permanganate; sodium or alcohols may be reduced open-chain , and converted to 1,4-diaminobutane. Pyridazine is widely used as pharmaceutical raw materials, such as long-term sulfa SMP which is pyridazine derivative, 4-amino-cinnoline which belongs to antimalarials, blood pressure drug hydralazine, etc. all use pyridazine as raw materials; it can also be used as raw material of pesticides, for the production of herbicides, "herbicide-sensitive", "Milstem", "bromine herbicide-sensitive", "Kusakira," "maleic hydrazide", "Norflurazon", "pyridate "" insecticide "," imputed phosphorus "and so on.
Synthesis and Structure
Pyridazines are heterocyclic compounds with an N-N bond in their ring structure. The pyridazine molecule is a π-deficient heteroaromatic compound similar to pyridine. Due to the presence of the π-deficient nitrogen aromatic heterocycles these compounds are more easily soluble in water when compared to other hydrocarbons. The basic aromatic ring system of pyridazine contains two adjacent nitrogen atoms.
The parent heterocycle was first prepared by oxidation of benzocinnoline to the pyridazinetetracarboxylic acid followed by decarboxylation. A better route to this otherwise esoteric compound starts with the maleic hydrazide. These heterocycles are often prepared via condensation of 1,4-diketones or 4-ketoacids with hydrazines.
Pyridazines are effective water oxidation catalysts with high efficiency turnover numbers up to 700.
Chemical Properties
Pyridazine is a nitrogen-containing six-membered heterocyclic compound belonging to the azine class, being an isomer of pyrimidine and pyrazine. It exists as a clear yellowish-brown liquid, insoluble in petroleum ether but readily soluble in methanol, ethanol, and diethyl ether. It is miscible with water, benzene, and dimethylformamide. Pyridazine is a weak base capable of forming salts with picric acid, hydrochloric acid, and similar compounds. It exhibits limited reactivity towards aromatic nucleophilic and electrophilic substitution reactions and demonstrates stability towards potassium permanganate. Reduction with sodium or alcohols cleaves the chain, converting it into 1,4-diaminobutane.
Uses
Pyrrolo[1,2-b]pyridazine 1 is a N-bridgehead aromatic heterocycle containing two nitrogen atoms, is obtained by the condensation of pyridazine and pyrrole.
Definition
ChEBI: Pyridazine is a member of pyridazines and a diazine.
Preparation
Pyridazine is obtained by the condensation of butenedial and hydrazine.
General Description
Pyridazine is a mono-basic 1,2-diazine compound, which is commonly prepared by the reaction of 1,4-dicarbonyls with hydrazines. Pyridazine ring is found in many herbicides like credazine, pyridatol and many pharmaceutical drugs like cefozopran, olaparib, talazoparib, and cadralazine.
Safety Profile
Moderately toxic by intraperitoneal route. When heated to decomposition it emits toxic vapors of NOx.
Pyridazine Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from Pyridazine manufacturers
- Product
- Pyridazine 289-80-5
- Price
- US $200.00-1.00/KG
- Min. Order
- 1KG
- Purity
- 99%, 99.5% Sublimated
- Supply Ability
- g-kg-tons, free sample is available
- Release date
- 2023-12-30
- Product
- Pyridazine 289-80-5
- Price
- US $0.00-0.00/kg
- Min. Order
- 0.10000000149011612kg
- Purity
- 98%
- Supply Ability
- 100kg
- Release date
- 2023-03-08
- Product
- Pyridazine 289-80-5
- Price
- US $0.00-0.00/kg
- Min. Order
- 0.0001kg
- Purity
- 98%minGC
- Supply Ability
- 100kgs/month
- Release date
- 2022-06-07