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HONGKUN / PRODUCT DIRECTORY

Quinolinic acid | CAS 89-00-9

A pyridine dicarboxylic acid studied as a tryptophan-pathway metabolite and NMDA-receptor agonist, with procurement centred on exact acid form, concentration assignment and suitability for the intended biochemical assay.

CAS89-00-9
Molecular formulaC7H5NO4
Molecular weight167.12 g/mol

Product overview

Quinolinic acid is pyridine-2,3-dicarboxylic acid: two adjacent carboxyl groups on a pyridine ring. This tryptophan metabolite is used in studies of neuronal excitation and NMDA-receptor-related mechanisms. It also provides a defined dicarboxylic-acid scaffold for chemical work. Selection for biochemical assays requires attention to the free-acid form, assigned content and water, together with the conditions used to prepare quantitative solutions. These measurements help establish the amount introduced into the assay and support comparison across experimental batches.

Chemical identity

Chemical name
Quinolinic acid
CAS number
89-00-9
Molecular formula
C7H5NO4
Molecular weight
167.12 g/mol

Application context

Neurochemical research uses quinolinate to investigate excitatory signalling, including comparisons with NMDA and responses to receptor antagonists. It has also been studied in oxidative-stress assays using brain preparations. For these experimental systems, define the solution concentration, pH and matrix controls alongside chemical identity. Quinolinic acid and kynurenic acid have different identities and experimental roles. If quantitative analysis requires a calibrated reference, request the assigned value and certificate appropriate to that purpose; for general reagent use, agree the assay basis and preparation requirements.

Chemistry and synthetic role

The pyridine nitrogen and adjacent carboxyl groups define a molecule whose protonation state depends on the solution environment. Free acid and a separately supplied quinolinate salt are different procurement descriptions; record the form used when calculating solution concentration.

Quality review

Specify free acid or a defined salt

The CAS in this entry refers to quinolinic acid. Confirm any counterion and composition before substituting a quinolinate salt in an assay.

Establish concentration traceability

For quantitative work, request the assay basis and water information needed to convert weighed mass into a defensible solution concentration.

Match qualification to the assay matrix

Agree how solution preparation, pH and any interfering impurities will be controlled. Sterility, endotoxin or trace-metal testing is application-dependent and is not implied by reagent identity.

Preparing a specification

State CAS 89-00-9, free-acid form, required assay and identity methods, and whether the material is a synthesis reagent, biochemical reagent or value-assigned reference. Add water and assay-specific interference criteria where the intended test requires them.

Packaging and storage

Packaging format, closure and net weight should be agreed for the selected grade, order quantity and destination. Request the actual supplier SDS and confirm its storage and transport instructions before receipt.

Documentation

Request a COA and SDS, plus the method and basis of content assignment. For reference-material use, confirm availability of a suitable certificate; for biological work, ask only for the additional testing actually required by the receiving laboratory.

Procurement questions

Is quinolinic acid a quinoline compound?

The established name refers to pyridine-2,3-dicarboxylic acid; the structure is not a fused quinoline.

Can kynurenic acid be used interchangeably?

No. It is a different chemical identity and must be specified separately.

What is needed to prepare quantitative assay solutions?

Specify the acid or salt form, content basis and water result, then define concentration, pH and matrix controls for the assay.

Technical sources
  1. PubChem CID 1066NCBI / PubChem
  2. Quinolinic Acid MeSH D017378US National Library of Medicine
  3. A comparison of the effects of N-methyl-D-aspartate and quinolinate on central neurones of the ratMcLennan / Neuroscience Letters; PubMed
  4. N-methyl-D-aspartate receptors are involved in the quinolinic acid, but not in the malonate pro-oxidative activity in vitroPuntel et al. / Neurochemical Research; PubMed
  5. Quinolinic acid product 14941Cayman Chemical