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5231-87-8 - 3,4-Diethoxy-3-cyclobutene-1,2-dione, 98% - Diethyl squarate - Squaric acid diethyl ester - A19248 - Alfa Aesar

A19248 3,4-Diethoxy-3-cyclobutene-1,2-dione, 98%

CAS Number
5231-87-8
Synonyms
Diethyl squarate
Squaric acid diethyl ester

Size Price ($) Quantity Availability
1g 46.50
5g 152.00
25g 572.00
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3,4-Diethoxy-3-cyclobutene-1,2-dione, 98%

MDL
MFCD00001333

Chemical Properties

Formula
C8H10O4
Formula Weight
170.16
Boiling Point
95°/0.1mm
Flash Point
>110°(230°F)
Density
1.162
Refractive Index
1.5090

Literature References

For reaction with 1-lithiofuran and thermal rearrangement of the resulting 1-hydroxy-1-furanyl derivative to give, after oxidation, a furanoquinone, see: Org. Synth. Coll., 8, 179 (1993); other examples of annulated quinones are also listed.

/n

GHS Hazard and Precautionary Statements

Hazard Statements: H334-H315-H319-H317-H335

May cause allergy or asthma symptoms or breathing difficulties if inhaled. Causes skin irritation. Causes serious eye irritation. May cause an allergic skin reaction. May cause respiratory irritation.

Precautionary Statements: P285-P261-P280-P305+P351+P338-P304+P340-P342+P311-P362-P312-P405-P501a

In case of inadequate ventilation wear respiratory protection. Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. If experiencing respiratory symptoms: Call a POISON CENTER or doctor/physician. Take off contaminated clothing and wash before reuse. Call a POISON CENTER or doctor/physician if you feel unwell. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Other References

Beilstein
640626
Harmonized Tariff Code
2914.50
TSCA
No
RTECS
GU1772466

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