Croconic acid, 98%

Name: Croconic acid, 98%
Brand: Vaqora Chemicals
SKU: VQ-000545

About Croconic acid, 98%

Croconic acid (CAS 488-86-8) is a biological stain offered by Vaqora Chemicals (Puriss grade), specified at 98% purity. The compound has the formula C5H2O5, corresponding to a molecular weight of 142.07 g/mol. Systematically, it is named 4,5-dihydroxycyclopent-4-ene-1,2,3-trione. Alternative names: 4,5-Dihydroxy-4-cyclopentene-1,2,3-trione and Crocic acid.

It is supplied as a yellow to dark yellow powder. Literature values give a melting point of above 300 °C and a density of ~2.3 g/cm3. Keep the container tightly sealed and store it in a cool, dry area. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

It is commonly used for histology and cytology staining, microscopy, clinical laboratories and organic synthesis. It is used across academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Available in 100 mg, 500 mg, 1 g and 5 g packs, Croconic acid is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Organic synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Croconic acid, 98%
Catalogue No.	VQ-000545
CAS Number	488-86-8
IUPAC name	4,5-dihydroxycyclopent-4-ene-1,2,3-trione
Molecular formula	C₅H₂O₅
Molecular weight	142.07 g/mol
Exact mass	141.9902
Grade	Puriss
Purity / assay	98%
HSN code	29142990
InChIKey	RBSLJAJQOVYTRQ-UHFFFAOYSA-N
SMILES	C1(=C(C(=O)C(=O)C1=O)O)O
PubChem CID	546874

Physical properties
Physical form	Powder
Appearance	Yellow to dark yellow powder
Melting point	>300 °C
Density	~2.3 g/cm3
LogP (XLogP3)	-0.8
H-bond donors / acceptors	2 / 5
TPSA	91.7 Å²
Synonyms	4,5-Dihydroxy-4-cyclopentene-1,2,3-trione, Crocic acid, Croconic acid, 98%, 4,5-Dihydroxy-4-cyclopentene-1,2,3-trione #, 4-Cyclopentene-1,2,3-trione, 4,5-dihydroxy-, C5H2O5, 1,2-Dihydroxy-3,4,5-trioxocyclopent-1-ene, 6HGY35

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Croconic acid, 98%?

The CAS Registry Number of Croconic acid, 98% is 488-86-8. It is also known as 4,5-Dihydroxy-4-cyclopentene-1,2,3-trione, Crocic acid, Croconic acid, 98%.

What is the molecular formula and molecular weight of Croconic acid, 98%?

Croconic acid, 98% has the molecular formula C5H2O5 and a molecular weight of 142.07 g/mol. Its IUPAC name is 4,5-dihydroxycyclopent-4-ene-1,2,3-trione.

Which grade and pack sizes of Croconic acid, 98% can I order?

We supply Croconic acid, 98% in Puriss (98%) grade, in 100 mg, 500 mg, 1 g, 5 g, 25 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Croconic acid, 98%?

Yes. Every lot of Croconic acid, 98% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Croconic acid, 98% be shipped internationally?

Yes. Croconic acid, 98% is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.