Squaric acid
Agent Name
Squaric acid
Alternative Name
3,4-Dihydroxy-3-cyclobutene-1,2-dione
CAS Number
2892-51-5
Formula
C4-H2-O4
Major Category
Other Classes
Synonyms
1,2-Dihydroxycyclobutene-3,4-dione; 1,2-Diketo-3,4-dihydroxycyclobutene; 3,4-Dihydroxy-3-cyclobuten-1,2-dion; 3,4-Dihydroxy-3-cyclobutene-1,2-dione; 3,4-Dihydroxy-cyclobutene-1,2-dione; Cyclobutene-1,2-dione, 3,4-dihydroxy-; Dihydroxycyclobutenedione; Quadratic acid; Quadratsaeure; Squaric acid; 3-Cyclobutene-1,2-dione, 3,4-dihydroxy-; Cyclobutenedione, dihydroxy- (8CI); [ChemIDplus] 1,2-Dihydroxycyclobutenedione; Diketocyclobutenediol; [Merck Index]
Category
Aliphatic Ketones, Other
Description
Solid; [Merck Index] Gray crystalline solid; [Sigma-Aldrich MSDS]
Sources/Uses
Used to make pharmaceutical intermediates, squarylium dyes, and photoconducting squaraines; The dibutylester is used as a contact sensitizer in the treatment of alopecia and warts; [Merck Index]
Comments
A skin and strong eye irritant; May cause skin sensitization; [Sigma-Aldrich MSDS] Search for (2892-51-5[EC/RN Number]) AND (dermatitis OR allergic OR sensitizer OR sensitization): no reports of skin sensitization; [PubMed]
Biomedical References
Diseases, Processes, and Activities Linked to This Agent
Other Information
No other related information on this agent was found.