Dopaquinone

Name: Dopaquinone
Brand: Vaqora Chemicals
SKU: VQ-039706

About Dopaquinone

Dopaquinone (CAS 25520-73-4) is a high-purity reference standard of Levodopa offered by Vaqora Chemicals. Formula C9H9NO4, molecular weight 195.17 g/mol. The IUPAC name is (2S)-2-amino-3-(3,4-dioxocyclohexa-1,5-dien-1-yl)propanoic acid. Alternative names: Dopaquinone Sulphate and L-Dopaquinone.

The product is provided as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. Good laboratory practice and suitable PPE are recommended during handling.

Laboratories use this Levodopa standard for identity and assay testing, system suitability checks and method validation supporting ANDA and DMF filings. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

We offer Dopaquinone in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Identification & assay
Method development & validation
QC reference material

Industries

Related to Levodopa

View every impurity, metabolite and intermediate we list for Levodopa.

Levodopa impurities

Specifications & identifiers

Chemical identifiers
Product name	Dopaquinone
Catalogue No.	VQ-039706
CAS Number	25520-73-4
IUPAC name	(2S)-2-amino-3-(3,4-dioxocyclohexa-1,5-dien-1-yl)propanoic acid
Molecular formula	C₉H₉NO₄
Molecular weight	195.17 g/mol
Exact mass	195.0532
Grade	Reference Standard
HSN code	38229090
InChIKey	AHMIDUVKSGCHAU-LURJTMIESA-N
SMILES	C1=CC(=O)C(=O)C=C1C[C@@H](C(=O)O)N
PubChem CID	439316

Physical properties
Physical form	Solid
LogP (XLogP3)	-3.4
H-bond donors / acceptors	2 / 5
TPSA	97.5 Å²
Synonyms	Dopaquinone Sulphate, L-Dopaquinone, o-Dopaquinone, 4-(2-Carboxy-2-aminoethyl)-1,2-benzoquinone, (alphaS)-alpha-Amino-3,4-dioxo-1,5-cyclohexadiene-1-propanoic acid, (S)-2-Amino-3-(3,4-dioxocyclohexa-1,5-dien-1-yl)propanoic acid, (S)-alpha-Amino-3,4-dioxo-1,5-cyclohexadiene-1-propanoic acid, 1,5-Cyclohexadiene-1-propanoic acid, alpha-amino-3,4-dioxo-, (S)-, 3-(3,4-dioxocyclohexa-1,5-dien-1-yl)-L-alanine, (S)-2-amino-3-(3,4-dioxocyclohexa-1,5-dien-1-yl)propanoate, (alpha-S)-alpha-Amino-3,4-dioxo-1,5-cyclohexadiene-1-propanoic acid, (2S)-2-azanyl-3-[3,4-bis(oxidanylidene)cyclohexa-1,5-dien-1-yl]propanoic acid

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 Dopaquinone?

The CAS Registry Number of Dopaquinone is 25520-73-4. It is also known as Dopaquinone Sulphate, L-Dopaquinone, o-Dopaquinone.

What is the molecular formula and molecular weight of Dopaquinone?

Dopaquinone has the molecular formula C9H9NO4 and a molecular weight of 195.17 g/mol. Its IUPAC name is (2S)-2-amino-3-(3,4-dioxocyclohexa-1,5-dien-1-yl)propanoic acid.

What is Dopaquinone used for?

Dopaquinone is supplied as a characterised reference material related to Levodopa. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Dopaquinone can I order?

We supply Dopaquinone in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Dopaquinone?

Yes. Every lot of Dopaquinone 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 Dopaquinone be shipped internationally?

Yes. We export Dopaquinone worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.