反式2-戊烯

Name: 反式2-戊烯
Brand: 济南圣和化工有限公司

CAS 646-04-8C5H10MW 70.13

济南圣和化工有限公司现供应有机化学品——反式2-戊烯（CAS 646-04-8），分子式 C5H10，分子量 70.13。本页理化参数仅供参考，实际常规纯度按批次COA提供(不公开发布)，以批次 COA 及订单确认为准，支持批量采购与长期供货协议。

产品概览

CAS号	646-04-8
分子式	C5H10
分子量	70.13
熔点	-140.2 °C
沸点	36.3 °C
LogP	2.1
纯度	按批次COA提供(不公开发布)
包装	按订单/批次确认(不公开发布)
应用领域	有机化学品
类别	有机化学品

应用领域

有机化学品

该产品的下游应用集中在有机化学品。不同客户工艺差异较大，我们支持按需提供样品与小批量试用。

包装与储存

包装规格按订单/批次确认(不公开发布)

纯度规格按批次COA提供(不公开发布)

储存条件密封、阴凉干燥处保存

运输常规化工运输

样品可协商提供

交期现货/按订单安排

供应说明：反式2-戊烯常规包装为按订单/批次确认(不公开发布)，储存时应密封置于阴凉干燥处，避免与氧化剂混放。济南圣和化工有限公司支持国内物流发货，大货交期与运费以订单确认为准。

质量与文件

每批产品随货提供 COA（分析证书）；可按需提供 MSDS/技术数据表及第三方检测报告。纯度与包装以批次 COA 及订单确认为准。

关于供应商

济南圣和化工有限公司位于山东济南，主营化工原料供应，精选产品齐全，覆盖有机化学品、无机化学品、食品添加剂、医药中间体等多个大类。我们随货提供 COA 分析证书，一个工作日内回复报价，欢迎国内外采购方长期合作。

常见问题

反式2-戊烯的 CAS 号是多少？

反式2-戊烯的 CAS 号为 646-04-8。

该产品的纯度和包装规格是什么？

常规纯度规格为按批次COA提供(不公开发布)，包装为按订单/批次确认(不公开发布)，随货提供 COA。

反式2-戊烯有什么用途？

主要应用于有机化学品。

如何购买或获取报价？

请发送邮件至 info@591daili.com 或通过 WhatsApp 联系，注明产品名称、CAS 号与需求数量，一个工作日内回复报价。供应商：济南圣和化工有限公司。

PubChem 公开数据

Description

trans-2-Pentene · CAS 646-04-8 · C5H10. UNII YCO1SJQ98H. Boiling Point: 36.3 °C; Melting Point: -140.2 °C; Flash Point: less than -4 °F (NFPA, 2010).

Identification

CAS Registry Number	646-04-8
PubChem CID	5326161
Molecular formula	C5H10
IUPAC name	(E)-pent-2-ene
UNII (FDA)	YCO1SJQ98H

Computed Descriptors

Molecular Weight	70.13
XLogP3	2.1
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	0
Rotatable Bond Count	1
Exact Mass	70.078250319
Monoisotopic Mass	70.078250319
Topological Polar Surface Area	0
Heavy Atom Count	5
Formal Charge	0

Physical & Chemical Properties

Boiling Point	36.3 °C
Melting Point	-140.2 °C
Flash Point	less than -4 °F (NFPA, 2010)
Solubility	In water, 203 mg/l @ 25 °C
Density	0.6431 @ 25 °C/4 °C
Density	Density: 0.6482 @ 20 °C/4 °C; 0.5824 @ 80 °C/4 °C; 0.6675 @ 0 °C/4 °C
Vapor Density	2.4 (Air= 1)
Vapor Pressure	506.0 [mmHg]
Vapor Pressure	5.06X10+2 mm Hg @ 25 °C
Surface Tension	16.41 dyne/cm @ 25 °C

Physical description & handling notes

2-pentene, (e)- is a colorless liquid with a hydrocarbon odor. Usually in technical grade as a mixture of isomers. Used as a solvent, in organic synthesis, and as a polymerization inhibitor.
Liquid; bp = 36.3 deg C; [HSDB] Colorless liquid with an odor of hydrocarbons; Technical grade is mixture of isomers; [CAMEO] Colorless liquid; bp = 36-37 deg C; [MSDSonline]
Liquid
BELOW -4 °F (BELOW -20 °C) (CLOSED CUP)
Soluble in benzene; miscible in ethanol, ethyl ether
When heated to decomposition it emits acrid smoke and irritating fumes.

Regulatory Status

GHS notification summary	1.2% (1 / 84)

GHS Hazard Classification

GHS notification summary	1.2% (1 / 84)
Reported hazard statements	H224 (75%), H225 (23.8%), H302 (26.2%), H304 (70.2%), H315 (56%), H319 (56%), H332 (26.2%), H335 (54.8%)

This chemical does not meet GHS hazard criteria for 1.2% (1 of 84) of reports.

H224 (75%): Extremely flammable liquid and vapor [Danger Flammable liquids]

Documented Uses

Used as a polymerization inhibitor, solvent, and to make petroleum resins and sec-amyl alcohols; [HSDB]
Polymerization inhibitor; organic synth /2-Pentene/
CHEM INT FOR PETROLEUM RESINS (AS MIXED PENTENES)
CHEM INT FOR SEC-AMYL ALCOHOLS (ISOMERIC MIXT)
Prepn of mixture of cis & trans isomers by dehydration of 2-pentanol ... Prepn of the ... trans form from 1-ethyl-2-iodobutyric acid with sodium carbonate ... prepn of both isomers from sec-amyl alc with H2SO4 and diatomaceous earth @ 90-110 °C for 3 hr
CRACKING OF PETROLEUM DISTILLATES FOLLOWED BY SEPARATION

Synonyms

trans-2-Pentene; 646-04-8; (E)-2-Pentene; (E)-pent-2-ene; 2-PENTENE; 2-Pentene, (E)-; Methylbut-1-ene; 2-Pentene, (2E)-; (2E)-2-Pentene; 3-Pentene; MFCD00009384; sym-Methylethylethylene; EINECS 261-403-7; YCO1SJQ98H; 58718-78-8; trans-beta-Amylene

Frequently Asked Questions

What are the CAS number and molecular formula of trans-2-Pentene?

CAS 646-04-8; molecular formula C5H10; molecular weight — g/mol.

What other names is trans-2-Pentene known by?

trans-2-Pentene, 646-04-8, (E)-2-Pentene, (E)-pent-2-ene, 2-PENTENE, 2-Pentene, (E)-.

Is trans-2-Pentene classified as hazardous?

1.2% of GHS notifications report no hazard classification (1 of 84).

What are the key physical properties of trans-2-Pentene?

Boiling Point: 36.3 °C; Melting Point: -140.2 °C; Flash Point: less than -4 °F (NFPA, 2010); Solubility: In water, 203 mg/l @ 25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.