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513-81-5 Usage

General Description

2,3-Dimethyl-1,3-butadiene is a chemical compound classified as a hydrocarbon diene. It has the molecular formula C6H10 and is primarily used in the industrial production of chemical products where it serves as an important reactive intermediate. Its exact nature involves two double bonds, indicating its potential for reactions. It appears as a clear, colorless to light yellow liquid and has a characteristic, strong odor. As a chemical substance, it needs to be handled with care due to potential harm which may include skin and eye irritation or respiratory issues. Additionally, it poses particular risks in relation to fire and explosion hazards.

Check Digit Verification of cas no

The CAS Registry Mumber 513-81-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,1 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 513-81:
55 % 10 = 5
So 513-81-5 is a valid CAS Registry Number.

513-81-5 Well-known Company Product Price

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  • Alfa Aesar

  • (L04207)  2,3-Dimethyl-1,3-butadiene, 98%, stab. with 100ppm BHT   

  • 513-81-5

  • 10g

  • 457.0CNY

  • Detail
  • Alfa Aesar

  • (L04207)  2,3-Dimethyl-1,3-butadiene, 98%, stab. with 100ppm BHT   

  • 513-81-5

  • 50g

  • 1316.0CNY

  • Detail
  • Sigma-Aldrich

  • (39718)  2,3-Dimethyl-1,3-butadiene  analytical standard

  • 513-81-5

  • 39718-1ML

  • 676.26CNY

  • Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name 2,3-Dimethyl-1,3-butadiene

1.2 Other means of identification

Product number -
Other names 1,3-Butadiene, 2,3-dimethyl-

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:513-81-5 SDS

513-81-5Relevant articles and documents

Stable vapor-phase catalytic conversion of pinacolone into 2,3-dimethyl-1,3-butadiene

Sato, Satoshi,Sato, Natsumi,Yamada, Yasuhiro

, p. 831 - 833 (2012)

In the vapor-phase synthesis of 2,3-dimethyl-1,3-butadiene from pinacolone over modified alumina catalysts, it was found that alumina modified with transition metals such as Co stabilized the conversion of pinacolone and produced 2,3- dimethyl-1,3-butadiene selectively under hydrogen flow conditions, whereas the catalytic activity of pure alumina was seriously deteriorated irrespective of its high initial activity.



, p. 1619 (1963)




, p. 947 - 950 (1977)


Control of Polymorphisms and Functions in All-Inorganic Ionic Crystals Based on Polyaluminum Hydroxide and Polyoxometalates

Mizuno, Kosuke,Mura, Takuto,Uchida, Sayaka

, p. 4968 - 4974 (2016)

Two kinds of polymorphs of all-inorganic ionic crystals were obtained by the combination of oppositely charged molecular ions (macroions) with Td symmetry, Keggin-type polyaluminum hydroxide [?-Al13O4(OH)24(H2O)12]7+ (Al13) and polyoxometalates (POMs) [α-CoW12O40]6- (POM6), [α-1,2,3-SiVV3W9O40]7- (POM7), or [α-1,2,3-SiVIVVV2W9O40]8- (POM8) in aqueous solutions. The needle-type crystals were grown by dissolution-recrystallization of the precipitates, which formed immediately by combining Al13 and POMs. On the other hand, the plate-type crystals were grown by adding inorganic salts (e.g., NaCl) into the aqueous solution containing the needle-type crystals: Dissolution of the needle-type crystals occurred followed by precipitation of the plate-type crystals, which is the more insoluble and stable polymorph with larger numbers of hydrogen bonds between the constituent ions. The plate-type crystals possess one-dimensional channels with large apertures (ca. 12 ? × 6 ?) and showed high activities as heterogeneous solid acid catalysts in pinacol rearrangement.


Reinecke, Manfred G.,Newsom, James G.,Almqvist, Anders

, p. 4151 - 4157 (1981)

Flow vacuum thermolysis (FVT) of thiophene-2,3-di-carboxylic anhydride (2) in the presence of 2,3-dimethylbutadiene (6) gives, in addition to 5,6-dimethylthianaphthene (9), small quantities of a dihydrodimethylthianaphthene (12) and another dimethylthianaphthene (13) which is probably also formed by dehydrogenation of 12 with chloranil.The partial structures of these minor products are consistent with their being formed by a -cycloaddition between 6 and an intermediate aryne, 2,3-didehydrothiophene (1), followed by a rearrangement of the resulting adduct 11 and dehydrogenation.FVT of 2 in the presence of 2,5- (17b) or 3,4-dimethylthiophene (17c) also gave a mixture of the dimethylthianaphthenes (18, 22, 23) which can be rationalized as arising by a - and two -cycloadditions of the aryne 1 to the thiophenes 17 with subsequent desulfurization.The lack of equilibration of the products 18, 22, and 23 was demonstrated and their origin as a function of the structure and reactivity of the aryne 1 discussed.

The Tetramethyleneethane Radical Cation. An ESR and ENDOR Study

Gerson, Fabian,Meijere, Armin de,Qin, Xue-Zhi

, p. 1135 - 1136 (1989)


Isomeric effects on the acidity of Al13Keggin clusters in porous ionic crystals

Ogiwara, Naoki,Tamai, Nanako,Uchida, Sayaka,Weng, Zhewei,Yan, Li-Kai,Zhao, Congcong,Zhou, Wei

, p. 8893 - 8896 (2021)

We demonstrate a facile synthesis method of a porous ionic crystal (PIC) composed of the little-known δ-Keggin-type cationic polyoxoaluminum cluster ([δ-Al13O4(OH)24(H2O)12]7+, δ-Al13) with an oppositely-charged polyoxometalate, which enabled us to investigate the activity as a solid acid. The δ-Al13based PIC exhibited much higher activity in pinacol rearrangement, a typical acid-catalyzed reaction, than the PIC based on the well-known and thermodynamically stable rotational isomer (ε-Al13). This work is a rare example of rotational isomers of polyoxoaluminum clusters exhibiting remarkably different catalytic activities.

1,1-Dimetallagermacyclopent-3-enes: Precursors to Transition Metal Substituted Germylenes (Germanediyls)

Lei, Deqing,Hampden Smith, Mark J.

, p. 1211 - 1213 (1989)

Transition metal substituted germylenes have been generated by pyrolysis of 1,1-dimetallagermacyclopent-3-enes and by the metathesis reaction between GeI2 and -(Cp = C5H5).

Nickel-catalyzed reductive 1,3-diene formation from the cross-coupling of vinyl bromides

Sha, Yunfei,Liu, Jiandong,Wang, Liang,Liang, Demin,Wu, Da,Gong, Hegui

supporting information, p. 4887 - 4890 (2021/06/16)

Facile construction of 1,3-dienes building upon cross-electrophile coupling of two open-chain vinyl halides is disclosed in this work, showing moderate chemoselectivities between the terminal bromoalkenes and internal vinyl bromides. The present method is mild and tolerates a range of functional groups and can be applied to the total synthesis of a tobacco fragrance solanone.

A method of preparing 1,2,4,5-benzenetetracarboxylic acid or trimellitic acid from pinacol


Paragraph 0055-0060, (2018/04/01)

The invention relates to a method of preparing 1,2,4,5-benzenetetracarboxylic acid or trimellitic acid from pinacol. The method includes a first step of selectively dehydrating the pinacol in an acid/ionic liquid catalytic system to generate 2,-3-dimethyl-1,3-butadiene; a second step of subjecting the 2,-3-dimethyl-1,3-butadiene and maleate or acrylate to a D-A cycloaddition/dehydrogenation tandemreaction to generate an aromatic ring product; and a third step of subjecting the aromatic ring product to hydrolysis and oxidation to prepare the 1,2,4,5-benzenetetracarboxylic acid or the trimellitic acid. The catalytic system adopted in the method is green, and can be recycled. The raw material is a biomass-based platform chemical, and is cheap and easily available. All reaction processes aresimple. The pinacol dehydration reaction, the dehydrogenation reaction of a D-A product and an oxidation reaction are high in activity and selectivity. The novel method for preparing the 1,2,4,5-benzenetetracarboxylic acid and the trimellitic acid which are fine chemicals from the pinacol that is a lignocelluloses based platform chemical is provided by the invention.

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