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ChemicalBook >> CAS DataBase List >> Diethyl squarate

Diethyl squarate

Diethyl squarate price.
  • $8 - $2624.35
  • Product name: Diethyl squarate
  • CAS: 5231-87-8
  • MF: C8H10O4
  • MW: 170.16
  • EINECS:
  • MDL Number:MFCD00001333
  • Synonyms:3,4-DIETHOXYCYCLOBUTANE-1,2-DIONE;Diethyl squarate, Squaric acid diethyl ester;SQUARIC ACID DIETHYL ESTER,(DIETHYL SQUARATE, 3,4-DIETHOXY-3-CYCLOBUTENE-1,2-DIONE);DIETHOXYCYCLOBUTENEDIONE;3,4-DIETHOXY-3-CYCLOBUTENE-1,2-DIONE 98%;SQUARICACIDDIETHYLESTER/3,4-DIETHOXY-3-CYCLOBUTENE-1,2-DIONE;3,4-Diethoxy-3-cyclobuten-1,2-dion;Diethyl quadratate
Price83 Properties Safety Information Description
83 prices
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Brand
  • aablocks
  • ACHEMBLOCK
  • Activate Scientific
  • AHH
  • AK Scientific
  • Alichem
  • American Custom Chemicals Corporation
  • Apolloscientific
  • Arctom
  • Atlantic Research Chemicals
  • Biosynth
  • Chemenu
  • Crysdot
  • Frontier Specialty Chemicals
  • Matrix Scientific
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  • TCI Chemical
  • Thermo Scientific Chemicals
  • TRC
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  • Manufactureraablocks
  • Product numberAA0033FP
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 98%
  • Packaging1g
  • Price$8
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0033FP
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 98%
  • Packaging5g
  • Price$12
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0033FP
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 98%
  • Packaging10g
  • Price$22
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0033FP
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 98%
  • Packaging25g
  • Price$42
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0033FP
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 98%
  • Packaging100g
  • Price$166
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0033FP
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 98%
  • Packaging500g
  • Price$686
  • Updated2026-05-28
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberP45520
  • Product descriptiondiethoxycyclobut-3-ene-1,2-dione 97%
  • Packaging100G
  • Price$165
  • Updated2026-05-27
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberP45520
  • Product descriptiondiethoxycyclobut-3-ene-1,2-dione 97%
  • Packaging5G
  • Price$20
  • Updated2026-05-27
  • Buy
  • ManufacturerActivate Scientific
  • Product numberAS32398
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 98%
  • Packaging5g
  • Price$25
  • Updated2026-06-04
  • Buy
  • ManufacturerActivate Scientific
  • Product numberAS32398
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 98%
  • Packaging25g
  • Price$84
  • Updated2026-06-04
  • Buy
  • ManufacturerActivate Scientific
  • Product numberAS32398
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 98%
  • Packaging100g
  • Price$280
  • Updated2026-06-04
  • Buy
  • ManufacturerAHH
  • Product numberMT-09000
  • Product description3,4-Diethoxy-3-cyclobutene-1,2-dione 97%
  • Packaging100g
  • Price$365
  • Updated2026-05-26
  • Buy
  • ManufacturerAK Scientific
  • Product numberP013
  • Product descriptionDiethyl squarate 98%(GC)
  • Packaging500g
  • Price$792
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ91160
  • Product descriptionDiethyl squarate 95%
  • Packaging500g
  • Price$591
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ20011
  • Product descriptionDiethyl squarate 99%(GC)
  • Packaging100g
  • Price$272
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ91160
  • Product descriptionDiethyl squarate 95%
  • Packaging100g
  • Price$151
  • Updated2026-06-04
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA0033FP 3,4-Diethoxy-3-cyclobutene-1,2-dione 98% 1g $8 2026-05-28 Buy
aablocks AA0033FP 3,4-Diethoxy-3-cyclobutene-1,2-dione 98% 5g $12 2026-05-28 Buy
aablocks AA0033FP 3,4-Diethoxy-3-cyclobutene-1,2-dione 98% 10g $22 2026-05-28 Buy
aablocks AA0033FP 3,4-Diethoxy-3-cyclobutene-1,2-dione 98% 25g $42 2026-05-28 Buy
aablocks AA0033FP 3,4-Diethoxy-3-cyclobutene-1,2-dione 98% 100g $166 2026-05-28 Buy
aablocks AA0033FP 3,4-Diethoxy-3-cyclobutene-1,2-dione 98% 500g $686 2026-05-28 Buy
ACHEMBLOCK P45520 diethoxycyclobut-3-ene-1,2-dione 97% 100G $165 2026-05-27 Buy
ACHEMBLOCK P45520 diethoxycyclobut-3-ene-1,2-dione 97% 5G $20 2026-05-27 Buy
Activate Scientific AS32398 3,4-Diethoxy-3-cyclobutene-1,2-dione 98% 5g $25 2026-06-04 Buy
Activate Scientific AS32398 3,4-Diethoxy-3-cyclobutene-1,2-dione 98% 25g $84 2026-06-04 Buy
Activate Scientific AS32398 3,4-Diethoxy-3-cyclobutene-1,2-dione 98% 100g $280 2026-06-04 Buy
AHH MT-09000 3,4-Diethoxy-3-cyclobutene-1,2-dione 97% 100g $365 2026-05-26 Buy
AK Scientific P013 Diethyl squarate 98%(GC) 500g $792 2026-06-04 Buy
AK Scientific J91160 Diethyl squarate 95% 500g $591 2026-06-04 Buy
AK Scientific J20011 Diethyl squarate 99%(GC) 100g $272 2026-06-04 Buy
AK Scientific J91160 Diethyl squarate 95% 100g $151 2026-06-04 Buy
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Properties

Melting point :13-18 °C
Boiling point :95 °C0.1 mm Hg(lit.)
Density :1.15 g/mL at 25 °C(lit.)
refractive index :n20/D 1.509(lit.)
Flash point :>230 °F
storage temp. :2-8°C
form :Liquid
color :Clear yellow to light brownish
Water Solubility :insoluble
BRN :640626
InChI :1S/C8H10O4/c1-3-11-7-5(9)6(10)8(7)12-4-2/h3-4H2,1-2H3
InChIKey :DFSFLZCLKYZYRD-UHFFFAOYSA-N
SMILES :CCOC1=C(OCC)C(=O)C1=O
CAS DataBase Reference :5231-87-8(CAS DataBase Reference)
NIST Chemistry Reference :3,4-Diethoxy-3-cyclobutene-1,2-dione(5231-87-8)

Safety Information

Symbol(GHS): Exclamation Mark (GHS07)Health Hazard (GHS08)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352 IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Description

3,4-Dethoxy-3-cyclobutene-1,2-dione is used as a starting material for synthesis of furanonesand quinones.It undergoes ethoxy substitution with aminesand unsaturated organosilanes.

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Suppliers and manufacturers

ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD
Diethyl squarate
$2.00
Diethyl squarate CAS:5231-87-8
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Capot Chemical Co.,Ltd.
Henan Tianfu Chemical Co.,Ltd.
CONIER CHEM AND PHARMA LIMITED
Shaanxi Dideu Medichem Co. Ltd
SIMAGCHEM CORP
Hefei TNJ Chemical Industry Co.,Ltd.
Win-Win chemical CO., Limited
Honest Joy Holdings Limited