1-ペンタノール 化学特性,用途語,生産方法
外観
無色澄明の液体
溶解性
水にわずかに可溶 (2.79g/100ml 水, 22℃), アルコール, エーテル混和。エタノール及びアセトンに極めて溶けやすく、水に溶けにくい。
解説
1-ペンタノール，ペンタノール，ペンチルアルコール，n-アミルアルコールともいう．炭素数5の脂肪族飽和アルコールには異性体が8種類あり，このうち直鎖状，末端炭素にヒドロキシ基をもつ異性体のことをいう．ブテンからオキソ合成法で製造される．特臭のある無色の液体．融点－78.2 ℃，沸点138.00 ℃．d2540.8112．n25D1.4081．爆発範囲(下限)1.19体積％．エタノール，エーテルに易溶，水に微溶．おもに溶剤および酢酸エステルの合成原料として用いられる．
用途
医薬品原料、香料
用途
溶剤、エステル合成の中間体、食品添加物、香味料。
説明
1-Pentanol is a monohydroxy alcohol. It is a colorless liquid with a characteristic odor. Its combustion properties have been studied as it shows promising features to be an alternative to gasoline and diesel fuels. The conversion of 1-pentanol to di-n-pentyl ether (DNPE) in liquid phase at 423K in a batch reactor using ion exchange resins as catalysts.
化学的特性
1-Pentanol is a clear, colorless liquid at ambient temperatures.The air odor detection level (lowest perceptible level) was
reported as 10 ppm for 1-pentanol .
天然物の起源
Reported found in banana, sweet cherry, cranberry, bourbon, vanilla, rice bran and Brazil nut.
使用
Raw material for pharmaceutical preparations;organic synthesis solvent.
1-Pentanol is used as a key starting material in the production of dichloro-acetic acid pentyl ester, 2-methyltetrahydrofuran, di-n-penyl ether (DNPE), pentyl butyrate and amyl acetate. As a solvent, it is used for coating CDs and DVDs. It has been considered to be a replacement for gasoline and diesel fuels due to its combustion properties. Further, it is used as a reagent to prepare derivatives of ferulic acid and caffeic acid, which shows anticancer properties.
定義
ChEBI: An alkyl alcohol that is pentane in which a hydrogen of one of the methyl groups is substituted by a hydroxy group. It has been isolated from Melicope ptelefolia.
調製方法
1-Pentanol is made primarily by the oxo process, which
involves the reaction of butenes with carbon monoxide and hydrogen in the presence of a catalyst, followed by
hydrogenation. 1-Pentanol is used as a solvent,
as a chemical intermediate for esters, and as a food additive
and flavoring substance. The primary routes
of industrial exposure are by dermal contact and inhalation.
一般的な説明
A colorless liquid with a mild to moderately strong odor. Less dense than water. Flash point 91°F. Boiling point 280°F. Vapors heavier than air. Moderately toxic by ingestion. Vapors may irritate skin and eyes. Used as a solvent and to make other chemicals.
Pentanol is incompatible with strong oxidising agents, alkali metals, alkaline earth metals, halogens, hydrogen trisulphide, acids, acetaldehyde, acid anhydrides, acid chlorides, lithium aluminium hydride, isocyanates, dialkylmagnesiums, n-halomides, ethylene oxide, hypochlorous acid, hydrogen peroxide and sulphuric acid, nitrogen tetraoxide, nitryl hypochlorite, permonosulphuric acid, and tri-isobutyl aluminium.
空気と水の反応
Highly flammable. Soluble in water.
反応プロフィール
Moderately toxic, flammable if exposed to powerful oxidizers. Incompatible with oxidizing materials, hydrogen trisulfide [Sax, 9th ed., 1996, p. 224].
危険性
Lower explosive level in air 1.2% by volume. Moderate fire risk.
健康ハザード
Irritation of skin, eyes, and respiratory tract; headache and vertigo; dyspnea and cough; nausea, vomiting, and diarrhea. Double vision, deafness, delirium, and occasionally fatal poisoning, preceded by severe nervous symptoms, have been reported. Coma, glycosuria, and methemoglobinemia can occur.
火災危険
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
安全性プロファイル
Moderately toxic by
ingestion and skin contact. An eye and
upper respiratory irritant by inhalation. A
severe skin and eye irritant. Ingestion can cause headache, nausea, vomiting, delirium,
and methemoglobin formation. Mutation
data reported. Extremely flammable if
exposed to heat, flame, or powerful
oxiduers. Moderately explosive when
exposed to flame. Incompatible with
oxidzing materials, hydrogen trisulfide. To
fight fire, use alcohol foam, dry chemical.
職業ばく露
(n-isomer); Suspected reprotoxic hazard,
Primary irritant (w/o allergic reaction), (iso-, primary):
Possible risk of forming tumors, Primary irritant (w/o allergic
reaction), (sec-, active primary-, and other isomers)
Primary irritant (w/o allergic reaction). Used as a solvent in
organic synthesis and synthetic flavoring, pharmaceuticals,
corrosion inhibitors; making plastics and other chemicals;
as a flotation agent. The (n-isomer) is used in preparation
of oil additives, plasticizers, synthetic lubricants, and as a
solvent.
輸送方法
UN2811 Pentanols, Hazard Class: 3; Labels: 3-
Flammable liquid. UN1987 Alcohols, n.o.s., Hazard Class:
3; Labels: 3-Flammable liquid.
純化方法
Dry 1-pentanol with anhydrous K2CO3 or CaSO4, filter and fractionally distil it. It has also been treated with 1-2% of sodium and heated at reflux for 15hours to remove water and chlorides. Traces of water can be removed from the near-dry alcohol by refluxing it with a small amount of sodium in the presence of 2-3% n-amyl phthalate or succinate followed by distillation (see ethanol). Small amounts of amyl alcohol have been purified by esterifying with p-hydroxybenzoic acid, recrystallising the ester from CS2, saponifying with ethanolic-KOH, drying with CaSO4 and fractionally distilling [Olivier Recl Trav Chim Pays-Bas 55 1027 1936]. [Beilstein 1 IV 1640.]
不和合性
Forms an explosive mixture with air.
Contact with strong oxidizers and hydrogen trisulfide may
cause fire and explosions. Incompatible with strong acids.
Violent reaction with alkaline earth metals forming hydrogen,
a flammable gas.
廃棄物の処理
Dissolve or mix the material
with a combustible solvent and burn in a chemical incinerator
equipped with an afterburner and scrubber. All federal,
state, and local environmental regulations must be
observed.
1-ペンタノール 上流と下流の製品情報
原材料
準備製品