Dibutyl squarate

Product Name: Dibutyl squarate
CAS No.: 2892-62-8
Chemical Name: Dibutyl squarate
Synonyms: SADBE;SQUARIC ACID DIBUTYL ESTER;DIBUTYL SQUARATE;di-n-butyl squarate;TIMTEC-BB SBB007902;SQUARIC ACID DI-N-BUTYL ESTER;Squaric acid dibutyl ester,97%;Di-n-butyl squarate~Squaric ac;3,4-DIBUTOXYCYCLOBUT-3-ENE-1,2-DIONE;3,4-DIBUTOXY-3-CYCLOBUTENE-1,2-DIONE
CBNumber: CB5400591
Molecular Formula: C12H18O4
Formula Weight: 226.27
MOL File: 2892-62-8.mol

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Dibutyl squarate Property

Boiling point:: 139 °C0.5 mm Hg(lit.)
Density: 1.047 g/mL at 25 °C(lit.)
refractive index: n20/D 1.494(lit.)
Flash point:: >230 °F
storage temp.: Sealed in dry,Room Temperature
form: Liquid
color: Clear colorless to yellow
Water Solubility: INSOLUBLE
BRN: 1968189
InChI: InChI=1S/C12H18O4/c1-3-5-7-15-11-9(13)10(14)12(11)16-8-6-4-2/h3-8H2,1-2H3
InChIKey: XBRWELTXMQSEIN-UHFFFAOYSA-N
SMILES: C1(=O)C(OCCCC)=C(OCCCC)C1=O
CAS DataBase Reference: 2892-62-8(CAS DataBase Reference)
NIST Chemistry Reference: Dibutyl squarate(2892-62-8)

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Safety

Hazard Codes: Xn
Risk Statements: 36/37/38-42/43
Safety Statements: 26-27-36/37/39-45
WGK Germany: 3
RTECS: GU1772066
HS Code: 29145090

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H317May cause an allergic skin reaction

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 339792
Product name: 3,4-Dibutoxy-3-cyclobutene-1,2-dione
Purity: 98%
Packaging: 5g
Price: $100
Updated: 2025/07/31

Sigma-Aldrich

Product number: 339792
Product name: 3,4-Dibutoxy-3-cyclobutene-1,2-dione
Purity: 98%
Packaging: 25g
Price: $444
Updated: 2025/07/31

TCI Chemical

Product number: D2203
Product name: 3,4-Dibutoxy-3-cyclobutene-1,2-dione
Purity: >97.0%(GC)
Packaging: 5g
Price: $68
Updated: 2025/07/31

TCI Chemical

Product number: D2203
Product name: 3,4-Dibutoxy-3-cyclobutene-1,2-dione
Purity: >97.0%(GC)
Packaging: 25g
Price: $267
Updated: 2025/07/31

TRC

Product number: B415698
Product name: 3,4-Dibutoxycyclobut-3-ene-1,2-dione
Packaging: 50mg
Price: $45
Updated: 2021/12/16

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Dibutyl squarate Chemical Properties,Usage,Production

Chemical Properties

clear colorless to yellow liquid

Uses

3,4-Dibutoxy-3-cyclobutene-1,2-dione was used in the synthesis of novel semisquarylium dye, useful for highly selective Hg2+ sensing in aqueous media. It was also employed in the synthesis of 3-butoxy-4-(1,3,3-trimethyl-2,3-dihydro-1H-2-indolylidenemethyl)-3-cyclobutene-1,2-dione, intermediate for the synthesis of squaryl dyes.

Uses

Squaric acid and its derivatives (Dibutyl squarate) are used in synthesis of pharmaceutical intermediates, squarylium dyes, and photoconducting squaraines.

Definition

ChEBI: A cyclic ketone and diether that is a dibutyl ether derivative of squaric acid.

General Description

3,4-Dibutoxy-3-cyclobutene-1,2-dione is the dialkyl ester of squaric acid.

Synthesis

2892-51-5

71-36-3

2892-62-8

General procedure for the synthesis of di-n-butyl squarate from squaric acid (1) (2.00 g, 17.54 mmol) and n-butanol: Squaric acid (1) was dissolved in n-butanol (50 mL) and the reaction was carried out under stirring conditions at reflux for 3 hours. After completion of the reaction, the mixture was cooled in an ice bath, followed by the addition of diethyl ether (Et2O, 50 mL). The mixture was washed sequentially with cold distilled water, cold saturated aqueous NaHCO3 solution and cold distilled water. The organic layer was separated and dried with anhydrous sodium sulfate. The solvent was removed by distillation under reduced pressure to give the brown oily product di-n-butyl squarate (2.92 g, 74% yield). The product was chromatographically pure and could be used in subsequent reactions without further purification.

References

[1] Canadian Journal of Chemistry, 1986, vol. 64, p. 2267 - 2273
[2] Bulletin de la Societe Chimique de France, 1990, # 3, p. 367 - 374
[3] Bioorganic and Medicinal Chemistry, 2017, vol. 25, # 14, p. 3803 - 3814
[4] Journal of Molecular Structure, 2009, vol. 936, # 1-3, p. 239 - 249
[5] Comptes Rendus Chimie, 2012, vol. 15, # 5, p. 454 - 462

Dibutyl squarate Preparation Products And Raw materials

Raw materials

Preparation Products

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Dibutyl squarate Suppliers

Americas 1 Belgium 2 Canada 1 China 145 Europe 1 Germany 3 India 4 Japan 2 Switzerland 2 United Kingdom 7 United States 30 Global 198

Adamas Reagent, Ltd.

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INTATRADE GmbH

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Energy Chemical

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Shijiazhuang Sdyano Fine Chemical Co., Ltd.

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Shanghai Longsheng chemical Co.,Ltd.

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View Lastest Price from Dibutyl squarate manufacturers

ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD

Product: Dibutyl squarate 2892-62-8
Price: US $2.00-5.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 100kg
Release date: 2025-06-27

Hebei Chuanghai Biotechnology Co., Ltd

Product: Dibutyl squarate 2892-62-8
Price: US $30.00-10.00/KG
Min. Order: 50KG
Purity: 99%
Supply Ability: 500000kg
Release date: 2024-10-24

Hebei Zhuanglai Chemical Trading Co.,Ltd

Product: Dibutyl Squarate 2892-62-8
Price: US $75.00-25.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 20ton
Release date: 2024-05-27

2892-62-8, Dibutyl squarateRelated Search:

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3,4-DI-N-BUTOXY-3-CYCLOBUTEN-1,2-DIONE

3,4-DI-N-BUTOXY-3-CYCLOBUTENE-1,2-DIONE

3,4-DIBUTOXY-3-CYCLOBUTENE-1,2-DIONE

3,4-DIBUTOXYCYCLOBUT-3-ENE-1,2-DIONE

DIBUTYL SQUARATE

3,4-Dibutoxycyclobut-3-ene-1,2-dione 98%

Di-n-butyl squarate~Squaric acid di-n-butyl ester

3,4-DIBUTOXY-3-CYCLOBUTENE-1,2-DIONE, 98 %

di-n-butyl squarate

Squaric acid dibutyl ester, (Dibutyl squarate, 3,4-Dibutoxy-3-cyclobutene-1,2-dione)

SADBE

Squaric acid dibutyl ester,97%

Dibutyl squarate 3,4-Di-n-butoxy-3-cyclobutene-1,2-dione

3,4-Dibutoxy-3-cyclobutene-1,2-dione 98%

3,4-Dibutoxy-3-cyclobutene-1,2-dione, >=99%

SQUARIC ACID DIBUTYL ESTER

SQUARIC ACID DI-N-BUTYL ESTER

TIMTEC-BB SBB007902

Dibutyl Squarate Squaric Acid Dibutyl Ester SADBE

3-Cyclobutene-1,2-dione,3,4-dibutoxy-

Di-n-butyl squarate~Squaric ac

3,4-Dibutoxy-3-cyclobutene-1,2-dione&gt

squaric acid dibutyl ester(2892-62-8)

3,4-Di-n-butyloxy-3-cyclobutene-1,2-dione

2892-62-8

CH3CH23O2C4O2

Simple 4-Membered Ring Compounds

Cyclobutanes & Cyclobutenes

Organic Building Blocks

Ketones

Carbonyl Compounds

C11 to C12

Building Blocks

Cyclobutanes & Cyclobutenes

Simple 4-Membered Ring Compounds

API intermediates