Croconic acid
Croconic acid (CAS 488-86-8), with the molecular formula C5H2O5 and a molecular weight of 142.07 g/mol, is a cyclopentenone derivative and a weak organic acid. It appears as a crystalline solid and finds utility in various chemical research applications, particularly within cell biology and histology. Its distinctive chemical properties make it a compound of interest for studies involving stains and dyes.
- IUPAC
- 4,5-Dihydroxy-4-cyclopentene-1,2,3-trione

Histology and Hematology Stains
Croconic acid is employed as a component in certain histological and hematological stains. Its chemical structure allows for interactions that aid in the differential staining of cells and tissues, assisting in microscopic examination and diagnosis.
Cell Biology Research
In cell biology, croconic acid serves as a research chemical. It may be used in studies investigating cellular processes or as a reagent in specific experimental protocols where its acidic or reactive properties are relevant.
Dye Synthesis and Applications
As a compound related to the field of dyes, croconic acid can be a precursor or reagent in the synthesis of novel colourants. Its chromophoric structure makes it suitable for applications where specific spectral properties are required.
| Molecular weight | 142.07 |
|---|---|
| Empirical formula | C5H2O5 |
| Assay | 98% |
| Melting point | >300 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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 Croconic acid primarily used for?
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Croconic acid is primarily used in research settings, particularly within cell biology and histology, often in applications involving stains and dyes.
What is the CAS number and formula for Croconic acid?
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The CAS number for Croconic acid is 488-86-8, and its molecular formula is C5H2O5.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Croconic acid with an assay of 98%. This product is intended for research and laboratory use and is not supplied as USP, BP, EP, or any pharmacopoeia grade.
How should Croconic acid be handled safely?
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Handling Croconic acid requires appropriate personal protective equipment, including eyeshields and gloves. A respirator filter suitable for type N95 (US) or type P1 (EN143) is recommended due to potential respiratory irritation.
Is Croconic acid a controlled substance?
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The provided data does not indicate that Croconic acid is a controlled substance.
How is Croconic acid packed and shipped?
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Croconic acid is carefully packed to ensure safe transit and is exported globally by Tech Serve Solutions. Specific packaging details are available upon request.
How can I request a quote or sample for Croconic acid?
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To request a quote or sample for Croconic acid, please contact the Tech Serve Solutions sales team through our website or designated contact channels.
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