Diethyl squarate

Modify Date: 2025-08-25 23:50:52

Diethyl squarate structure	Common Name	Diethyl squarate
	CAS Number	5231-87-8	Molecular Weight	170.163
	Density	1.2±0.1 g/cm3	Boiling Point	325.7±0.0 °C at 760 mmHg
	Molecular Formula	C₈H₁₀O₄	Melting Point	19 °C
	MSDS	Chinese USA	Flash Point	135.4±30.7 °C
	Symbol	GHS07, GHS08	Signal Word	Danger

Name	3,4-Diethoxy-3-cyclobutene-1,2-dione
Synonym	More Synonyms

Density	1.2±0.1 g/cm3
Boiling Point	325.7±0.0 °C at 760 mmHg
Melting Point	19 °C
Molecular Formula	C₈H₁₀O₄
Molecular Weight	170.163
Flash Point	135.4±30.7 °C
Exact Mass	170.057907
PSA	52.60000
LogP	-0.15
Vapour Pressure	0.0±0.7 mmHg at 25°C
Index of Refraction	1.477
InChIKey	DFSFLZCLKYZYRD-UHFFFAOYSA-N
SMILES	CCOc1c(OCC)c(=O)c1=O
Storage condition	2-8°C
Water Solubility	insoluble

Diethyl squarate MSDS(Chinese)

Symbol	GHS07, GHS08
Signal Word	Danger
Hazard Statements	H315-H317-H319-H334-H335
Precautionary Statements	P261-P280-P284-P304 + P340-P305 + P351 + P338-P342 + P311
Personal Protective Equipment	Eyeshields;Faceshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
Hazard Codes	Xn:Harmful;
Risk Phrases	R36/37/38;R42/43
Safety Phrases	S7-S26-S37/39-S24-S23
RIDADR	NONH for all modes of transport
WGK Germany	3
RTECS	GU1772466

Ethanol

CAS#:64-17-5

Squaric acid

CAS#:2892-51-5

~86%

Diethyl squarate

CAS#:5231-87-8

Literature: Ohno, Masatomi; Yamamoto, Yoshihiko; Shirasaki, Yuhichi; Eguchi, Shoji Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1993 , # 2 p. 263 - 272

Triethyl orthof...

CAS#:122-51-0

Squaric acid

CAS#:2892-51-5

~83%

Diethyl squarate

CAS#:5231-87-8

Literature: Busschaert, Nathalie; Kirby, Isabelle L.; Young, Sarah; Coles, Simon J.; Horton, Peter N.; Light, Mark E.; Gale, Philip A. Angewandte Chemie - International Edition, 2012 , vol. 51, # 18 p. 4426 - 4430

Ethanol

CAS#:64-17-5

Triethyl orthof...

CAS#:122-51-0

Squaric acid

CAS#:2892-51-5

~91%

Diethyl squarate

CAS#:5231-87-8

Literature: Liu, Hiu; Tomooka, Craig S.; Moore, Harold W. Synthetic Communications, 1997 , vol. 27, # 12 p. 2177 - 2180

2,3-diethoxy-1,...

CAS#:1007834-24-3

Diethyl squarate

CAS#:5231-87-8

Literature: Fu, Nanyan; Allen, Annette D.; Kobayashi, Shinjiro; Tidwell, Thomas T.; Vukovic, Sinisa; Matsuoka, Takeshi; Mishima, Masaaki Journal of Organic Chemistry, 2008 , vol. 73, # 5 p. 1768 - 1773

Ethanol

CAS#:64-17-5

2-Cyclobuten-1-...

CAS#:3200-96-2

~28%

Diethyl squarate

CAS#:5231-87-8

Literature: Dehmlow, Eckehard V.; Schell, Hans G. Chemische Berichte, 1980 , vol. 113, # 1 p. 1 - 8

Precursor 4
CAS#:64-17-5 Ethanol CAS#:2892-51-5 Squaric acid CAS#:122-51-0 Triethyl orthof... CAS#:3200-96-2 2-Cyclobuten-1-...
DownStream 9
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