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CAS

  • or

303-04-8

2,3-DICHLOROHEXAFLUORO-2-BUTENE is a clear colorless liquid that exists in both cis and trans isomers. These isomers can be separated through a reaction with dry diglyme and sodium borohydride, followed by hydrolysis and purification using preparative vapor phase chromatography technique.

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  • 303-04-8 Structure

  • Basic information

    1. Product Name: 2,3-DICHLOROHEXAFLUORO-2-BUTENE
    2. Synonyms: 2,3-dichloro-1,1,1,4,4,4-hexafluoro-2-buten;2,3-Dichloro-1,1,1,4,4,4-hexafluorobutene-2;2,3-dichlorohexafluoro-2-buten;2,3-dichlorohexafluoro-2-butene,mixtureofcisandtrans;2-Butene, 2,3-dichloro-1,1,1,4,4,4-hexafluoro-;2-Butene, 2,3-dichlorohexafluoro-;2-Butene,2,3-dichloro-1,1,1,4,4,4-hexafluoro-;cfc1316
    3. CAS NO:303-04-8
    4. Molecular Formula: C4Cl2F6
    5. Molecular Weight: 232.94
    6. EINECS: 206-133-2
    7. Product Categories: Alkenyl;Halogenated Hydrocarbons;Organic Building Blocks
    8. Mol File: 303-04-8.mol

  • Chemical Properties

    1. Melting Point: -67 °C
    2. Boiling Point: 66-68 °C(lit.)
    3. Flash Point: 3.2°C
    4. Appearance: /
    5. Density: 1.605 g/mL at 25 °C(lit.)
    6. Vapor Density: 8 (vs air)
    7. Vapor Pressure: 4.42 psi ( 20 °C)
    8. Refractive Index: n20/D 1.3458(lit.)
    9. Storage Temp.: N/A
    10. Solubility: N/A
    11. CAS DataBase Reference: 2,3-DICHLOROHEXAFLUORO-2-BUTENE(CAS DataBase Reference)
    12. NIST Chemistry Reference: 2,3-DICHLOROHEXAFLUORO-2-BUTENE(303-04-8)
    13. EPA Substance Registry System: 2,3-DICHLOROHEXAFLUORO-2-BUTENE(303-04-8)

  • Safety Data

    1. Hazard Codes: T+,Xi,T,C
    2. Statements: 26-34
    3. Safety Statements: 26-28-36/37/39-45
    4. RIDADR: UN 3389 6.1/PG 1
    5. WGK Germany: 3
    6. RTECS: EM4910000
    7. HazardClass: 8
    8. PackingGroup: III
    9. Hazardous Substances Data: 303-04-8(Hazardous Substances Data)

303-04-8 Usage

Uses

Used in Chemical Synthesis:
2,3-DICHLOROHEXAFLUORO-2-BUTENE is used as a chemical intermediate for the synthesis of various compounds due to its unique structure and reactivity. The presence of chlorine and fluorine atoms in the molecule allows for further functionalization and the formation of a wide range of products.
Used in Pharmaceutical Industry:
2,3-DICHLOROHEXAFLUORO-2-BUTENE is used as a building block for the development of new pharmaceutical compounds. Its unique structure and properties make it a valuable candidate for the creation of novel drugs with potential applications in various therapeutic areas.
Used in Polymer Industry:
2,3-DICHLOROHEXAFLUORO-2-BUTENE can be used as a monomer in the polymer industry to produce polymers with specific properties, such as increased thermal stability, chemical resistance, or improved mechanical strength. These polymers can be utilized in various applications, including automotive, aerospace, and electronics industries.
Used in Agrochemical Industry:
2,3-DICHLOROHEXAFLUORO-2-BUTENE can be employed as a starting material for the synthesis of agrochemicals, such as pesticides and herbicides. Its unique chemical properties can contribute to the development of more effective and environmentally friendly products in this industry.
Used in Material Science:
2,3-DICHLOROHEXAFLUORO-2-BUTENE can be utilized in the development of new materials with specific properties, such as improved fire resistance, self-healing capabilities, or enhanced mechanical properties. These materials can find applications in various fields, including construction, automotive, and aerospace industries.

Check Digit Verification of cas no

The CAS Registry Mumber 303-04-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,0 and 3 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 303-04:
(5*3)+(4*0)+(3*3)+(2*0)+(1*4)=28
28 % 10 = 8
So 303-04-8 is a valid CAS Registry Number.
InChI:InChI=1/C4Cl2F6/c5-1(3(7,8)9)2(6)4(10,11)12/b2-1-

303-04-8SDS

SAFETY DATA SHEETS

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.Identification

1.1 GHS Product identifier

Product name 2,3-DICHLOROHEXAFLUORO-2-BUTENE

1.2 Other means of identification

Product number -
Other names 2,3-DICHLOROHEXAFLUOROBUT-2-ENE

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:303-04-8 SDS

303-04-8Relevant articles and documents

Gas-phase continuous synthesis method of cis-1,1,1,4,4,4-hexafluoro-2-butene

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Paragraph 0026-0028; 0031-0033; 0036-0038; 0041-0043; 0046, (2020/01/03)

The invention discloses a gas-phase continuous synthesis method of cis-1,1,1,4,4,4-hexafluoro-2-butene. The method includes the following preparation steps: (1) mixing 1,1,1-trifluorotrichloroethane with hydrogen for a reaction so as to obtain a product stream I, transferring the product stream I to a first separation tower, absorbing the mixed product stream obtained at the tower top through a HCl absorption tower, and returning the mixed product stream to a reactor I so as to obtain 1,1,1,4,4,4-hexafluoro-2,3-dichloro-2-butene in the tower kettle; (2) transferring the tower kettle liquid obtained in the step (1) to a preheater II, introducing hydrogen at the same time, performing mixing and preheating until 200 DEG C, transferring the preheated mixture to a reactor II, performing a hydrodechlorination reaction under the action of a catalyst so as to obtain a product stream II, transferring the product stream II to a second separation tower, and circulating the tower kettle liquid tothe reactor II; and (3) transferring the tower top product obtained in the step (2) to a preheater III, performing preheating to 260 DEG C, transferring the preheated product to a reactor III, performing an isomerization reaction under the action of a catalyst so as to obtain a product stream III, transferring the product stream III to a third separation tower so as to obtain cis-1 1,1,4,4,4-hexafluoro-2-butene in the tower kettle.

Preparation method of 1,1,1,4,4,4-hexafluoro-2-butene

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Page/Page column 6-8, (2019/12/25)

The invention discloses a preparation method of 1,1,1,4,4,4-hexafluoro-2-butene. The method comprises the following preparation steps: (1) reacting a raw material 1,1,1-trifluorotrichloroethane with hydrogen under the action of a catalyst to obtain a first product 1,1,1,4,4,4-hexafluoro-2,3-dichloro-2-butene; (2) reacting the 1,1,1,4,4,4-hexafluoro-2,3-dichloro-2-butene obtained in step (1) with hydrogen under the action of a catalyst to obtain a second product 1,1,1,4,4,4-hexafluoro-2-chloro-2-butene; (3) carrying out a gas-phase dehydrochlorination reaction on the 1,1,1,4,4,4-hexafluoro-2-chloro-2-butene obtained in step (2) under the action of a catalyst to obtain a third product hexafluoro-2-butyne; and (4) carrying out a selective hydrogenation reaction on the hexafluoro-2-butyne under the action of a catalyst to obtain the final product 1,1,1,4,4,4-hexafluoro-2-butene. The preparation method has the advantages of conventional and easily obtained raw material, simple process, convenience in operation, environmentally-friendly preparation process, small pollution, and suitableness for industrial production, and the prepared 1,1,1,4,4,4-hexafluoro-2-butene has an excellent selectivity and an excellent conversion rate.

Method for preparing 1,1,1,4,4,4-hexafluoro-2-butene

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Paragraph 0031; 0032, (2018/04/02)

The invention relates to a method for preparing 1,1,1,4,4,4-hexafluoro-2-butene. The method for preparing the 1,1,1,4,4,4-hexafluoro-2-butene comprises the following steps: (1) carrying out a reactionon 1,1,1-trifluorochloroethane and/or 1,1,1-trifluoro-2,2-dichloroethane used as raw materials in lights by using chlorine as a catalyst to generate 1,1,1,4,4,4,4-hexafluoro-2,2,3,3-tetrachlorobutane; (2) dechlorinating the 1,1,1,4,4,4,4-hexafluoro-2,2,3,3-tetrachlorobutane obtained in step (1) with zinc powder to prepare 1,1,1,4,4,4-hexafluoro-2,3-dichlorobutene; and (3) reacting the 1,1,1,4,4,4-hexafluoro-2,3-dichlorobutene obtained in step (2) with hydrogen in the presence of a hydrogenation catalyst to obtain the 1,1,1,4,4,4-hexafluoro-2-butene. The method has the advantages of easily available catalyst and raw materials, production of the final product from the above intermediate in multiple paths, and high yield.

Preparation method of 1,1,1,2,4,4,4-heptafluoro-2-butene

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Paragraph 0027; 0028; 0229; 0030; 0031; 0036; 0041, (2019/01/07)

The invention discloses a preparation method of 1,1,1,2,4,4,4-heptafluoro-2-butene. The method uses hexachlorobutadiene and hydrogen fluoride as raw materials and uses a chromium-based catalyst as a fluorine-chlorine exchange catalyst to form the 1,1,1,2,4,4,4-heptafluoro-2-butene under gas phase conditions through a plurality of gas-phase catalytic reactions. Compared with the prior art, the preparation method of the 1,1,1,2,4,4,4-heptafluoro-2-butene provided by the invention has the following advantages: 1, the gas phase fluorination method adopted in the method is a cycle fluorination method, has less three industrial wastes (waste water, waste gases and solid waste), and greatly reduces the production costs; 2, the method can realize rapid and multiple-cycle fluorination, improve a product yield, and have simple separation and purification of the product; and 3, the method has the advantages of cheap raw materials, convenient sources and simple operation, and is suitable for industrialized production.

PROCESS FOR THE PREPARATION OF FLUORINATED CIS-ALKENE

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Page/Page column 4, (2011/12/12)

Disclosed is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkane with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents of the chlorofluoroalkane with hydrogen to produce a fluorine-containing olefin. Also disclosed are catalyst compositions for the hydrodechlorination of chlorofluoroalkanes comprising copper metal deposited on a support, and comprising palladium deposited on calcium fluoride, poisoned with lead and reducing the in the presence or absence of a dehydrochlorination catalyst under conditions effective to form a product stream comprising cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336).

PROCESS FOR CIS 1,1,1,4,4,4-HEXAFLUORO-2-BUTENE

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Page/Page column 3, (2011/12/12)

Disclosed is a process for preparing cis-1,1,1,4,4,4-hexafluoropropene comprising the steps of (a) reacting CCl4 with a compound having the formula CF3CX═CXH, where each X is independently halogen or hydrogen, to form a compound having the formula CF3CXClCXHCCl3; (b) fluorinating the compound formed in step (a) to form a compound having the formula CF3CXHCXHCF3; (c) converting the compound formed in step (b) by a reaction selected from the group consisting of dehydrohalogenation, dehalogenation and both reactions, to form a compound having the formula CF3C≡CCF3; and (d) catalytically reducing the compound formed in step (c) with hydrogen to form the compound having the formula:

Process for the (CFC-113a) dimerization

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Page column 4-5, (2008/06/13)

A reductive dimerization process of 1,1,1-trifluoro, 2,2,2-trichloroethane (CFC-113a) with hydrogen, with formation of 1,1,1,4,4,4-hexafluoro-2,2,3,3-tetrachlorobutane and 1,1,1,4,4,4-hexafluoro-2,2-dichlorobutene, and mixtures thereof, wherein the catalyst is constituted by metal ruthenium supported on graphitized carbon obtainable by treatment of the carbon at temperatures higher than 2000° C., in inert gas, or aluminum fluoride having an high surface area.

A Novel Hydrodechlorinative Dimerization of Chlorofluorocarbons over Supported Ni Catalysts

Tomioka, Satoshi,Mori, Tohru,Ueda, Wataru,Morikawa, Yutaka,Ikawa, Tsuneo

, p. 1825 - 1826 (2007/10/02)

1,1,1-Trichloro-2,2,2-trifluoroethane or 1,1-dichloro-1,2,2,2-tetrafluoroethane, both of which have CF3 group, dimerizes over supported Ni catalysts at an elevated temperature (723 K) into corresponding C4-compounds in good to moderate yields.

LASER-POWERED HOMOGENEOUS DECOMPOSITION OF 1-BROMO-1-CHLORO-2,2,2-TRIFLUOROETHANE

Pola, Josef,Chvatal, Zdenek

, p. 233 - 244 (2007/10/02)

CW CO2 photosensitized (SF6) homogeneous decomposition of 1-bromo-1-chloro-2,2,2-trifluoroethane yields various halobutenes and haloethanes.The former are suggested to arise from a sequence of C-Br cleavage, radical recombinations to halobutanes and conse

PREPARATION OF SOME HIGHLY HALOGENATED DERIVATIVES OF FURAN

Dmowski, W.,Voellnagel-Neugebauer, H.

, p. 223 - 242 (2007/10/02)

Direct chlorination of 2-(2H-hexafluoropropyl)-tetrahydrofuran 1 gave high yield of 2-(2-chlorohexafluoropropyl)-pentachloro-2,5-dihydrofuran 2.Bromination of 1 gave very complex mixture of products, from which three compounds, viz. 2-bromo-5-(2H-hexafluoropropyl)-furan 3, 3-bromo-5-(2Hhexafluoropropyl)-furan 4, and 2,4-dibromo-5-(2H-hexafluoropropyl)-furan 5 were isolated.Exchange fluorination of 2 with dry KF at 240 - 300 deg led to a stepwise substitution of fluorines for chlorines to give mixtures of chloro-fluoro-2-(2-chlorohexafluoropropyl)-dihydrofurans 7,8,9 and 10 together with small amounts of 2-(2-chlorohexafluoropropyl)-3,4,5-trichlorofuran 6.Exchange fluorination of 3,4-dihalo-2,2,5,5-tetrafluoro-2,5-dihydrofurans 11a and 11b led to a substitution of fluorine for one vinylic halogen to give 3-halo-2,2,4,5,5-pentafluoro-2,5-dihydrofurans 12a and 12b in good yields.Compounds 2 - 12 were characterized by n.m.r., m.s., and i.r. spectroscopy and elemental analysis.