乙炔

乙炔用途

用途一：用作有机化工原料，也用于工业气焊、气割
用途二：广泛用于金属焊接和气源切割，同时还可用于医药加工、仪器分析和有机合成等领域
用途三：乙炔在高温下分解为碳和氢，由此可制备乙炔炭黑。一定条件下乙炔聚合生成苯，甲苯，二甲苯，,萘，蒽，苯乙烯，茚等芳烃。通过取代反应和加成反应，可生成一系列极有价值的产品。例如乙炔二聚生成乙烯基乙炔，进而与氯化氢进行加成反应得到氯丁二烯；乙炔直接水合制取乙醛；乙炔与氯化氢进行加成反应而制取氯乙烯；乙炔与乙酸反应制得乙酸乙烯；乙炔与氰化氢反应制取丙烯腈；乙炔与氨反应生成甲基吡啶和2-甲基-5-乙基吡啶；乙炔与甲苯反应生成二甲笨基乙烯，进一步催化剂裂化生成三种甲基苯乙烯的异构体：乙炔与一分子甲醛缩合为丙炔醇，与二分子甲醛缩合为丁炔二醇；乙炔与丙酮进行加成反应可制取甲基炔醇，进而反应生成异戊二烯；乙炔和一氧化碳及其他化合物(如水，醇，硫醇)等反应制取丙烯酸及其衍生物。

乙炔名称

[ CAS 号 ]:
74-86-2

[ 中文名 ]:
乙炔

[ 英文名 ]:
Acetylene

[中文别名 ]:

电石气

[英文别名 ]:

Welding Gas
MFCD00008567
4-01-00-00939
Ethyne
C2H2
Ethine
vinylene
Acetylen
EINECS 200-816-9
ethenylene

乙炔物理化学性质

[ 密度 ]:
0.6±0.1 g/cm3

[ 沸点 ]:
-28 ºC

[ 熔点 ]:
-88°C

[ 分子式 ]:
C₂H₂

[ 分子量 ]:
26.037

[ 闪点 ]:
-18 ºC

[ 精确质量 ]:
26.015650

[ LogP ]:
0.37

[ 外观性状 ]:
一种无色气体带有一种微弱像大蒜一样的气味

[ 蒸汽压 ]:
69690.6±0.1 mmHg at 25°C

[ 折射率 ]:
1.316

[ 储存条件 ]:
库房通风低温干燥,轻装轻卸,与氧气、空气、氯气气体钢瓶分开存放

[ 水溶解性 ]:
0.106 g/100 mL

乙炔MSDS

详细MSDS(安全技术说明书)

乙炔毒性和生态

CHEMICAL IDENTIFICATION

RTECS NUMBER :: AO9600000

CHEMICAL NAME :: Acetylene

CAS REGISTRY NUMBER :: 74-86-2

LAST UPDATED :: 199712

DATA ITEMS CITED :: 22

MOLECULAR FORMULA :: C2-H2

MOLECULAR WEIGHT :: 26.04

WISWESSER LINE NOTATION :: 1UU1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Human

DOSE/DURATION :: 20 pph

TOXIC EFFECTS :: Behavioral - headache Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: 34ZIAG "Toxicology of Drugs and Chemicals," Deichmann, W.B., New York, Academic Press, Inc., 1969 Volume(issue)/page/year: -,67,1969

TYPE OF TEST :: LCLo - Lowest published lethal concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Human

DOSE/DURATION :: 50 pph/5M

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: TABIA2 Tabulae Biologicae. (The Hague, Netherlands) V.1-22, 1925-63. Discontinued. Volume(issue)/page/year: 3,231,1933

TYPE OF TEST :: LCLo - Lowest published lethal concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Mammal - species unspecified

DOSE/DURATION :: 50 pph/5M

REFERENCE :: AEPPAE Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. (Berlin, Ger.) V.110-253, 1925-66. For publisher information, see NSAPCC. Volume(issue)/page/year: 138,65,1928 *** REVIEWS *** ACGIH TLV-Simple asphyxiant, NO TWA DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD:ASPHYXIANTS/GASES DTLWS* "Documentation of the Threshold Limit Values for Substances in Workroom Air," Supplements. For publisher information, see 85INA8. Volume(issue)/page/year: 3,8,1973 OSHA PEL (Construc):simple asphyxiant - inert gas and vapor CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):Simple asphyxiant - inert gas and vapor CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):Simple asphyxiant - inert gas and vapor CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-ARAB Republic of Egypt:TWA 1 ppm (14 mg/m3) JAN 1993 OEL-AUSTRALIA:Asphyxiant JAN 1993 OEL-BELGIUM:Asphyxiant JAN 1993 OEL-HUNGARY:Asphyxiant JAN 1993 OEL-THE NETHERLANDS:Asphyxiant JAN 1993 OEL-SWITZERLAND:TWA 1000 ppm (1080 mg/m3) JAN 1993 OEL-UNITED KINGDOM:Asphyxiant JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO ACETYLENE-air:CL 2500 ppm/15M REFERENCE : NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda. Volume(issue)/page/year: DHHS #92-100,1992 NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 03298 No. of Facilities: 85909 (estimated) No. of Industries: 341 No. of Occupations: 111 No. of Employees: 704679 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 03298 No. of Facilities: 2514 (estimated) No. of Industries: 41 No. of Occupations: 52 No. of Employees: 48962 (estimated) No. of Female Employees: 3072 (estimated)

乙炔安全信息

[ 危害码 (欧洲) ]:
F+:Highlyflammable;

[ 风险声明 (欧洲) ]:
R5

[ 安全声明 (欧洲) ]:
S9-S16-S33

[ 危险品运输编码 ]:
UN 1001

[ 危险类别 ]:
2.1

[ 海关编码 ]:
2901292000

乙炔上下游产品

乙炔上游产品

乙炔下游产品

乙炔制备

1.电石法：由电石（碳化钙）与水作用得到乙炔。

2.天然气制乙炔法：预热到６００～６５０℃的原料天然气和氧进入多管式烧嘴板乙炔炉，在１５００℃下，甲烷裂解制得８％左右的稀乙炔，再用犖甲基吡咯烷酮提浓制得９９％的乙炔成品。

乙炔海关

[ 海关编码 ]: 2901292000

[ 中文概述 ]:
2901292000 乙炔。监管条件:AB(入境货物通关单,出境货物通关单)。增值税率:17.0%。退税率:9.0%。最低关税:2.0%。普通关税:45.0%

[ 申报要素 ]: 品名, 成分含量, 用途, 用作气体燃料的应报明包装容器容积, 散装货物应报明

[ 监管条件 ]: A.入境货物通关单 B.出境货物通关单

[ 检验检疫 ]: M.进口商品检验 N.出口商品检验

[ Summary ]:
2901292000 ethyne。supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward)。VAT:17.0%。tax rebate rate:9.0%。MFN tarrif:2.0%。general tariff:45.0%

乙炔相关知识

乙炔的化学式是什么？乙炔燃烧的化学式是什么?

2019-07-10 16:50:23

乙炔（acetylene）最简单的炔烃，又称电石气。分子式CH≡CH，是最简单的炔烃，化学式C2H2，分子结构：C原子以sp杂化轨道成键、分子为直线形的非极性分子。无色有芳香气味的易燃气体。熔点－80.8℃，沸点－84℃，相对密度0.6208(－82／4℃)。在液态和固态下或在气态和一定压力下有猛...

乙炔