에틸벤젠

에틸벤젠 속성

에틸벤젠 C화학적 특성, 용도, 생산

물성

방향족 탄화수소로 특유한 냄새가 나는 무색의 액체로서, 분자량 106.2, 녹는점 -94.98℃, 끓는점 136.19℃, 비중 0.86705(20℃), 굴절률=1.49588이다.

생산/준비/합성

공업적으로는 염화알루미늄·삼플루오르화붕소·인산등을촉매로하여벤젠에에틸렌을불어넣어제조한다.

물성

멘톨 크리스탈있습니다 냉각, 상큼, 및 기분좋게 강한 박하 아로마. 그들은 자주 화장품, salves, 발삼, 약용 크림, 목이 로젠, 치약, 구강, 껌 발 스프레이, 통증 완화 또는 냉각 바디 제품, 샴푸, 에어컨 liniments, 면도 크림, 구강 또는 목이 스프레이, 압축, 약용 오일, 냉각 젤. 멘톨 크리스탈 우수한 제품을 사용 도움이 완화 근육 통증, 기침, 주문폭주, 독감, 상부 호흡기. 이후 멘톨 크리스탈 너무 집중, 아주 작은 금액 내에서 필요한 제품.

용도

페놀프탈레인은 약한 유기산.용액 ph가 8.2 미만인 경우 무색의 락톤 형 구조.적색 퀴 노이드 구조에 대한 ph> 8.2 일 때.페놀프탈레인 색상 범위는 8.2 ~ 10.0, 그래서 phenolphthalein은 알칼라인성 검사 만 할 수 있습니다. 산성 시험.
1. 제약 산업 제약 원료:약물 요법,장 벽을 자극 할 수있다., 배변을 촉진하는 장 연동.
2. 유기 합성에 사용:주로 플라스틱의 합성에 사용,특히 디 나이트 로젠 나프탈렌 폴리 (아릴 에테르 케톤 케톤 폴리머 폴리) 아릴 에테르 케톤의 합성.고분자는 내열성이 우수하다.,방수,내식성,노화 방지 성 및 양호한 성형 성.섬유로 만든, 코팅 및 그 복합 재료는 많은 분야에서 널리 응용되고있다., 전자 제품, 기계 설비, 교통, 항공 우주, 핵 엔지니어링 및 군사 및 기타 분야.
3. 알칼리 표시기에 사용:비 수용액 적정 지시약, 크로마토 그래피 분석 시약.

화학적 성질

Ethylbenzene is a colorless liquid. Pungent aromatic odor. The Odor Threshold is 0.092
0.60 ppm

물리적 성질

Clear, colorless liquid with a sweet, gasoline-like odor. At 40 °C, the average odor threshold concentration and the lowest concentration at which an odor was detected were 550 and 150 μg/L, respectively. Similarly, at 25 °C, the average taste threshold concentration and the lowest concentration at which a taste was detected were 780 and 390 μg/L, respectively (Young et al., 1996). The average least detectable odor threshold concentrations in water at 60 °C and in air at 40 °C were 2.4 and 72 μg/L, respectively (Alexander et al., 1982). Cometto-Mu?iz and Cain (1994) reported an average nasal pungency threshold concentration of 10,100 ppm_v.

출처

Has apparently not been reported to occur in nature.

용도

Anesthetic.
Ethylbenzene is almost exclusively (> 99%) used as an intermediate for the production of styrene monomer. Less than 1 % of the ethylbenzene produced is used as a paint solvent or as an intermediate for the production of diethylbenzene and acetophenone (IARC 2000).
Ethylbenzene is a constituent (15-20%) of commercial xylene (“mixed xylenes”), and hence used as a component of solvents, as a diluent in paints and lacquers, and as a solvent in the rubber and chemical manufacturing industries (WHO 1996).
Ethylbenzene has been added to motor and aviation fuels because of its anti-knock properties. Estimates of ethylbenzene in gasoline have ranged from <1-2.7%. (IARC 2000).

제조 방법

By Friedel-Crafts reaction on benzene, ethylbromide and aluminium chloride (Arc tander, 1969).
Ethylbenzene is manufactured by alkylation from benzene and ethylene.

정의

ethylbenzene: A colourless flammableliquid, C₆H₅C₂H₅; r.d. 0.867;m.p. –95°C; b.p. 136°C. It is madefrom ethene and ethybenzene by aFriedel–Crafts reaction and is usedin making phenylethene (for polystyrene).

생산 방법

Ethylbenzene is produced by alkylation of benzene with ethylene, except for a very small fraction that is recovered from mixed C8 aromatics by superfractionation. The reaction takes place on acidic catalysts and can be carried out either in the liquid or vapor phase.

일반 설명

A clear colorless liquid with an aromatic odor. Flash point 59°F. Less dense than water (at 7.2 lb / gal) and insoluble in water. Hence floats on water. Vapors heavier than air. Used as a solvent and to make other chemicals.

공기와 물의 반응

Highly flammable. Insoluble in water.

반응 프로필

Ethylenzene can react vigorously with strong oxidizing materials .

위험도

Toxic by ingestion, inhalation, and skin absorption; irritant to skin and eyes. Flammable, dangerous fire risk. Possible carcinogen.

건강위험

The acute toxicity of Ethylbenzene is low.At high concentrations its exposure producesnarcotic effects similar to benzene andtoluene. A 4-hour exposure to a concentrationof 4000 ppm proved fatal to rats. The lethaldose varies with species. Deaths resulted fromintense congestion and edema of the lungs.
Other than the narcotic effects, Ethylbenzeneexhibits irritant properties that are somewhatgreater than those of benzene or toluene.It is an irritant to the skin, eyes, and nose.Repeated contact with the liquid may causereddening of the skin and blistering. Thevapors at 200 ppm may cause mild irritationof the eyes in humans, which may becomesevere and lacrimating at 2000–3000 ppm.
The oral toxicity in animals was foundto be low to very low. An LD50 value of3500 mg/kg for rats has been documented(NIOSH 1986). No adverse effects werenoted in animals subjected to chronic inhalationexposure at below 400 ppm. At higherdosages only the liver was affected (ACGIH1986). Ethylbenzene is eliminated from thebody by metabolic excretion. The urinarymetabolites in humans are mainly mandelicacid, C6H5CH(OH)COOH, and benzoylformicacid, C6H5COCOOH.

화학 반응

Reactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. Mildly toxic by inhalation and skin contact. An experimental teratogen. Other experimental reproductive effects. Human systemic effects by inhalation: eye, sleep, and pulmonary changes. An eye and skin irritant. Human mutation data reported. The liquid is an irritant to the skin and mucous membranes. A concentration of 0.1% of the vapor in air is an irritant to human eyes, and a concentration of 0.2% is extremely irritating at first, then causes dizziness, irritation of the nose and throat, and a sense of constriction in the chest. Exposure of guinea pigs to 1% concentration has been reported as causing ataxia, loss of consciousness, tremor of the extremities, and finally death through respiratory failure. The pathological findings were congestion of the brain and lungs with edema. A very dangerous fire and explosion hazard when exposed to heat or flame; can react vigorously with oxidizing materials. To fight fire, use foam, CO2, dry chemical. Emitted from modern budding materials (CENEAR 69,22,91). When heated to decomposition it emits acrid smoke and irritating fumes.

잠재적 노출

Ethylbenzene is used in styrene manufacture and in synthesis of p-nitroacetophenone; in the manufacture of cellulose acetate, and synthetic rubber. It is also used as a solvent or diluent; and as a component of automotive and aviation gasoline. Significant quantities of EB are present in mixed xylenes. These are used as dilatants in the paint industry, in agricultural sprays for insecticides and in gasoline blends (which may contain as much as 20% EB). In light of the large quantities of EB produced and the diversity of products in which it is found, there may exist environmental sources for ethylbenzene, e.g., vaporization during solvent use; pyrolysis of gasoline and emitted vapors at filling stations. Groups of individuals who are exposed to EB to the greatest extent and could represent potential pools for the expression of EB toxicity include: (1) individuals in commercial situations where petroleum products or by-products are manufactured e.g., rubber or plastics industry); (2) individuals residing in areas with high atmospheric smog generated by motor vehicle emissions

신진 대사

The main oxidation of ethyl benzene occurs at the activated α-methylene group to yield methylphenylcarbinol which is also the precursor of hippuric and mandelic acids. Both optical isomers of methylphenylcarbinol are formed, probably in equal amounts, and these have been isolated from the urine of rabbits as the corresponding glucuronides. The two optical forms of mandelic acid have also been found (Williams, 1959).

운송 방법

UN1175 Ethylbenzene, Hazard Class: 3; Labels: 3-Flammable liquid

비 호환성

Vapors may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids,oxoacids, and epoxides. Attacks plastics and rubber. May accumulate static electrical charges, and may cause ignition of its vapors.

폐기물 처리

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

에틸벤젠 준비 용품 및 원자재

원자재

준비 용품

에틸벤젠 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Hebei Mojin Biotechnology Co., Ltd	+8613288715578	sales@hbmojin.com	China	12456	58
Henan Fengda Chemical Co., Ltd	+86-371-86557731 +86-13613820652	info@fdachem.com	China	7845	58
Capot Chemical Co.,Ltd.	571-85586718 +8613336195806	sales@capotchem.com	China	29797	60
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21691	55
career henan chemical co	+86-0371-86658258	sales@coreychem.com	China	29914	58
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28180	58
Hebei Guanlang Biotechnology Co., Ltd.	+86-19930503282	alice@crovellbio.com	China	8823	58
Hubei xin bonus chemical co. LTD	86-13657291602	linda@hubeijusheng.com	CHINA	22968	58
Standardpharm Co. Ltd.	86-714-3992388	overseasales1@yongstandards.com	United States	14336	58
Shanghai Longyu Biotechnology Co., Ltd.	+8615821988213	info@longyupharma.com	China	2531	58

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