3,4-Dihydroxy-3-cyclobutene-1,2-dione
3,4-Dihydroxy-3-cyclobutene-1,2-dione (CAS 2892-51-5), a cyclobutenedione derivative with the linear formula (HO)2C4(=O)2 and a molecular weight of 114.06 g/mol, serves as a valuable building block in organic synthesis. Its unique structure facilitates diverse chemical transformations, making it a key intermediate in the development of novel materials and compounds for research purposes. This chemical is supplied by Tech Serve Solutions for laboratory and industrial applications.
- IUPAC
- Squaric acid
- Synonyms
- 2892-51-5(HO)2C4(=O)2Squaric acid

Organic Synthesis Intermediate
This dione is utilised as a foundational molecule in complex organic syntheses. Its reactive functional groups allow for its incorporation into various synthetic pathways to create novel organic structures.
Materials Science Research
The compound's structure makes it a candidate for research into new materials, particularly in areas like organic electronics. It can be modified to impart specific properties to advanced materials.
Chemical Reagent
As a synthetic tool, 3,4-Dihydroxy-3-cyclobutene-1,2-dione is employed in research laboratories for developing new chemical entities. Its availability as a reagent supports innovation in chemical science.
| Molecular weight | 114.06 |
|---|---|
| Linear formula | (HO)2C4(=O)2 |
| Assay | 98.50-101.00% (w/w) (HPLC) |
| Impurities tested | ≤0.5 % (w/w) water (Karl Fischer) |
| Melting point | >300 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38-43 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 3,4-Dihydroxy-3-cyclobutene-1,2-dione used for?
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3,4-Dihydroxy-3-cyclobutene-1,2-dione is primarily used as a building block in organic synthesis and for research in materials science, particularly in organic and printed electronics.
What are the CAS number and formula for 3,4-Dihydroxy-3-cyclobutene-1,2-dione?
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The CAS number is 2892-51-5, and its linear formula is (HO)2C4(=O)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3,4-Dihydroxy-3-cyclobutene-1,2-dione with an assay of 98.50-101.00% (w/w) (HPLC). It is not supplied as USP, BP, or EP grade.
What are the safety and handling considerations for this chemical?
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This compound is classified with GHS07 and a warning signal word. It causes skin irritation (H315), may cause an allergic skin reaction (H317), causes serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask (N95), eyeshields, face shields, and gloves, is required. Handle in a well-ventilated area.
How is 3,4-Dihydroxy-3-cyclobutene-1,2-dione packed and shipped?
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3,4-Dihydroxy-3-cyclobutene-1,2-dione is packed according to industry standards for chemical reagents and is exported globally by Tech Serve Solutions.
How can I request a sample or quote?
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To request a sample or a quote, please contact Tech Serve Solutions directly through our website or by phone, providing the product name and CAS number.
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