1118-58-7

Basic information

• Product Name: TRANS-2-METHYL-1,3-PENTADIENE
• Synonyms: 1,3-Dimethyl-1,3-butadiene;1,3-pentadiene,2-methyl-;2,4-Dimethyl-1,3-butadiene;2-Methyl-1,3-pentadiene,c&t;2-methyl-1,3-pentadiene,cis/transmixture;2-methyl-1,cis-3-pentadiene;2-methyl-3-pentadiene;2-methyl-penta-1,3-diene
• CAS NO: 1118-58-7
• Molecular Formula: C₆H₁₀
• Molecular Weight: 82.14
• EINECS: 214-264-1
• Mol File: 1118-58-7.mol
• Article Data: 7

Chemical Properties

• Melting Point: -14.9°C
• Boiling Point: 75-76 °C(lit.)
• Flash Point: -10 °C
• Appearance: /
• Density: 0,72 g/cm3
• Vapor Pressure: 113mmHg at 25°C
• Refractive Index: n20/D 1.451
• CAS DataBase Reference: TRANS-2-METHYL-1,3-PENTADIENE(CAS DataBase Reference)
• NIST Chemistry Reference: TRANS-2-METHYL-1,3-PENTADIENE(1118-58-7)
• EPA Substance Registry System: TRANS-2-METHYL-1,3-PENTADIENE(1118-58-7)

Safety Data

• Hazard Codes: F,Xi
• Statements: 11-36/37/38
• Safety Statements: 9-16-29-33-36-26
• RIDADR: 2461
• HazardClass: 3.1
• PackingGroup: II
• Hazardous Substances Data: 1118-58-7(Hazardous Substances Data)

Usage

General Description

Trans-2-Methyl-1,3-Pentadiene is an organic compound that consists of a five-carbon chain with one methyl group attached and two carbon-carbon double bonds positioned at the 1st and 3rd positions on the chain. It's isomeric, meaning it can exist in multiple forms that have the same chemical formula but different molecular structures. TRANS-2-METHYL-1,3-PENTADIENE is used in the chemical industry as a starting material for various chemical synthesis procedures. However, it should be handled with care due to its reactivity and potential to be a skin and eye irritant.

InChI:InChI=1/C6H10/c1-4-5-6(2)3/h4-5H,2H2,1,3H3/b5-4+

Upstream product

• 5182-37-6 2,4,4,6-tetramethyl-1,3-dioxane 
• 107-41-5 2-methyl-2,4-pentanediol 
• 67845-37-8 acetic acid-(1,3-dimethyl-but-3-enyl ester) 
• 1003-17-4 2,2-dimethyltetrahydrofuran 
• 7553-56-2 iodine 
• 7732-18-5 water 
• 63468-05-3 2-methyl-pent-3-en-2-ol 
• 7664-93-9 sulfuric acid 
• 2004-67-3 4-methyl-4-penten-2-ol 
• 4325-82-0 4-methyl pent-3-en-2-ol 
• 10035-10-6 hydrogen bromide 
• 763-30-4 2-methyl-1,4-pentadiene 
• 4798-45-2 4-methyl-pent-1-en-3-ol 
• 624-97-5 2-methylpent-4-en-2-ol 

Downstream Products

• 7584-11-4 4,6-dimethylpyridine-2-carbonitrile 
• 638-00-6 2,4-dimethylthiophene 
• 10033-92-8 2,4-Dimethyl-2,5-dihydro-thiophen-1,1-dioxid 
• 625-27-4 2-methyl-2-pentene 
• 27068-65-1 4,6-dimethyl-2-phenyl pyridine 
• 860376-98-3 2,4-dimethyl-cyclohex-3-enecarboxylic acid 
• 68039-49-6 2,4-dimethyl-3-cyclohexenecarboxaldehyde 
• 761-87-5 3,5-Dimethyl-1,4-hexadien 
• 5675-29-6 4-methyl-1,4-heptadiene 
• 159849-68-0 4,6-Dimethyl-3,6-dihydro-2H-pyran-2-carbaldehyde 
• 108-75-8 2,4,6-trimethyl-pyridine 
• 64-18-6 formic acid 
• 64-19-7 acetic acid 
• 127-17-3 2-oxo-propionic acid 

Relevant articles and documents

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Preparation method of 2-methyl-1,3-pentadiene

The invention relates to a preparation method of 2-methyl-1,3-pentadiene. The preparation method comprises the following steps: in the presence of a supported metal catalyst and a catalyst assistant,carrying out a dehydration reaction on 2-methyl-2,4-pentanediol to obtain 2-methyl-1,3-pentadiene. According to the method, strong acid is not used as a catalyst, so the selectivity of a product is effectively improved, higher yield can be obtained, the problem of equipment corrosion is avoided, the service life of equipment is prolonged, environmental protection benefits are remarkable, and the method is environment-friendly. The 2-methyl-1,3-pentadiene prepared by the method is high in selectivity and high in yield, the generation of a byproduct, namely 4-methyl-1,3-pentadiene is effectivelyreduced, the cyclic application of the catalyst is realized, and the industrial large-scale production of ligustral is facilitated.

A process for preparing 2 - methyl - 1, 3 - pentadiene method (by machine translation)

A process for preparing 2 - methyl - 1, 3 - pentadiene method, relates to 2 - methyl - 1, 3 - pentadiene. The 2 - methyl - 2, 4 pentanediol remove one molecule of water, to obtain the 4 - methyl - 4 - pentene - 2 - ol; the 4 - methyl - 4 - pentene - 2 - ol to remove a water molecule, to obtain 2 - methyl - 1, 3 - pentadiene. The 2 - methyl - 1, 3 - pentadiene yield, 2 - methyl - 1, 3 - pentadiene and 4 - methyl - 1, 3 pentadiene ratio can be increased to 9:1, 2 - methyl - 1, 3 - pentadiene and production yield is greater than 80%. The use of weakly acidic catalyst, to reduce the loss of the device. Selecting mild catalyst, to reduce the loss of the device, improves the reaction environment-friendly. The method of dewatering step by step, the reaction greatly reduces the 4 - methyl - 1, 3 pentadiene generation, improves the 2 - methyl - 1, 3 pentadiene yield. (by machine translation)

Process for dehydrating 2-methylpentane-2,4-diol

A process for dehydrating 2-methylpentanediol-2,4 to a mixture of 2-methyl-1,3-pentadiene and 4-methyl-1,3-pentadiene at elevated temperature in the presence of an acid catalyst using a polyglycol ether as a heat carrier, wherein a polyglycol ether containing from 80 to 100% by weight of a polyethylene glycol dimethyl ether of the formula CH3(OCH2CH2)nOCH3 where n=2-8 and from 0 to 20% by weight of a polyethylene glycol monomethyl ether of the formula CH3(OCH2CH2)nOH where n=2-8 based in each case on the total mass of polyglycol ether, is used.