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化工社化工社 化学情報印刷レポート · 研究参考用
HCID 9261作成日:2026年10月26日

ピラジン

ピラジン · 1,4-ジアジン · ピラジン, 99+% (DRY WT.) WATER <1.0% · ピラジン, 98% · Pyrazin · PyBO · Piazine · FEMA 4015

https://huagongshe.com/ja/chemical/9261

ピラジン の分子構造式

識別子と物理属性

CAS No.290-37-9
分子式C4H4N2
平均分子量80.09 g/mol
単同位体質量80.03744813 g/mol
SMILESc1cnccn1
InChIKeyKYQCOXFCLRTKLS-UHFFFAOYSA-N
PubChem CID9261
ChEMBLCHEMBL15797
ChEBICHEBI:30953
EC No.206-027-6
DTXSIDDTXSID8049410
現地名ピラジン

化学・物理的性質

XLogP-0.2
極性表面積25.8
水素結合供与体数0
水素結合受容体数2
回転可能結合数0
重原子数6
形式電荷0
複雑度26.5
物質分類Nitrogen Compounds -> Pyrazines
SpringerMaterials PropertiesSchoenflies notation
LogP(分配係数)-0.26-0.05
食品添加物FLAVORING AGENT OR ADJUVANT -> FDA Substance added to food
香味料EU Flavoring substances
溶解度freely soluble in water, organic solventsvery soluble (in ethanol)溶ける
沸点115.00 to 116.00 °C. @ 760.00 mm Hg115-118 °C115-116 °C (lit.)
融点54 - 56 °C50-56 °C (lit.)
Physical DescriptionSolid with a strong odor like pyridine[Merck Index] White crystalline solid with a strong odor[Alfa Aesar MSDS]deliquescent crystals or wax-like solid with a pungent, sweet, corn-like, nutty odour
Ionization EfficiencyPositive0.172.7Agilent XCTElectrospray ionizationformic acid (5.3nM)
密度1.031 g/mL at 25 °C (lit.)
屈折率1.5235
FEMA4015 | PYRAZINE
引火点132 °F
貯蔵条件Store below +30°C.
pKa(酸解離定数)0.65(at 27℃)
外観・状態クリスタル
色白い
比重1.031
臭いプロピレングリコール中0.10%。ローストしたヘーゼルナッツバーリーのような刺激的なスイートコーン
においのタイプナッティ
由来生物synthetic
Merck14,7957
JECFA Number951
BRN103905
誘電率2.7999999999999998
安定性安定。とても燃えやすい。酸、酸化剤と相容れない。
InChI1S/C4H4N2/c1-2-6-4-3-5-1/h1-4H
InChIKeyKYQCOXFCLRTKLS-UHFFFAOYSA-N
SMILESc1cnccn1
LogP(分配係数)-0.26
CAS データベース290-37-9(CAS DataBase Reference)
NISTの化学物質情報Pyrazine(290-37-9)
EPAの化学物質情報Pyrazine (290-37-9)

化学的特性

Pyrazine has a strong pyridine-like odor. Some reports compare the taste of pyrazine to cooked spinach or rancid peanuts

化学性质

色結晶,融点55℃,沸点116℃,水?エタノールに可溶

安全性と法規制

GHS 分類DangerH225 (47.9%): Highly Flammable liquid and vapor [Danger Flammable liquids]P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 165 reports by companies from 15 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
規制情報Chemical: PyrazineCommission Regulation (EC) No 1565/2000 (Repealed by Com. Implementing Reg. (EU) No 872/2012)Pyrazine: Does not have an individual approval but may be used under an appropriate group standard
有害性の概要Intraperitoneal LD50 (mouse) = 2,730 mg/kg[RTECS] Safe when used as a flavoring agent in food[JECFA] A skin and strong eye irritant[Alfa Aesar MSDS]
Hazard Classes and CategoriesFlam. Liq. 2 (47.9%)
水環境危害等級(WGK)3
TSCA 収載状態TSCA listed
RTECS 番号UQ2015000
輸送番号(UN)UN 1325 4.1/PG 2
税関コード29339990
危険文句(R)36/37/38-11
化審法(5)-3827
危険表示Xi,F
安全措置(S)26-36-16
危険等級4.1Flam. Sol. 1
包装等級III
貯蔵分類4.1B - Flammable solid hazardous materials

用途

解説

1,4‐ジアジンの別名。窒素2原子をもつ6員環芳香族複素環化合物の一つ。窒素2原子がパラ位に位置しているのでパラジアジンともよばれた。ヘリオトロープ様の芳香をもつ。ピラジン,パラジアジンともいう.アミノアセトアルデヒドを塩化水銀(Ⅱ)と水酸化ナトリウムとで酸化的自己縮合させると得られる.ヘリオトロープ様の香りをもつ無色の結晶.融点57 ℃,沸点116 ℃.d611.031.n61D1.4953.水,エタノール,エーテルに可溶.昇華性があり,水蒸気蒸留ができる.芳香族性と第三級アミンの性質をもつ.還元すればピペラジンになる.

用途

ピラジンの誘導体には香料?農薬など様々な用途がある。

天然物の起源

Pyrazine has been detected in several food products including papayas, asparagus, peanuts, popcorn, soybeans, corn, French fries, bread, cheese, milk, eggs (boiled), chicken (fried), beef (cooked), shrimp, clams, beer, sherry, malt, coffee and tea (green).

使用

Pyrazine is used as a flavoring agent. It serves as a component of some herbs in traditional Chinese medicine. It is employed as pharmaceutical intermediates, perfume intermediates and involved in the preparation of other chemicals. In addition to this, it is used in the production of pyrazine 1-oxide.

一般的な説明

Pyrazine is a 1,4-diazine and an electron-deficient N-heteroarene found in several natural products, APIs, agrochemicals, and functional materials.

製法・合成法

製造方法

Prepared by cyclization of α-amino ketones, which were produced by the reduction of isonitroso ketones to yield the dihydropyrazines, which are dehydrogenated with mercury(I) oxide or copper(II) sulfate or sometimes with atmospheric oxygen.

純化方法

Distil pyrazine in steam and crystallise it from water. Purify also by zone melting. [Beilstein 23 H 91, 23 II 80, 23 III/IV 899, 23/5 V 351.]