8-Hydroxy-2-quinolinecarboxylic acid (8HQC) is a tridentate chelating agent. It reacts with 2-aminophenol to form a benzoxazole derivative, which can undergo fluorescence quenching in water, making it a viable candidate for developing a probe for detecting water in aprotic organic solvents. The analysis of mid-IR and Raman spectra of 8HQC shows the presence of seven tautomers.

Application：

8-Hydroxy-2-quinolinecarboxylic acid may be used in the preparation of bis (8-hydroxyquinoline-2-carboxylato-Κ3N,O,O′) cobalt (II) trihydrate

Specifications

Synonyms

Specifications & Purity

≥98%

Storage

Room temperature

Shipped In

Normal

Action Type

INHIBITOR

Purity

≥98%

Names and Identifiers

Pubchem Sid	488184863
Pubchem Sid Url	https://pubchem.ncbi.nlm.nih.gov/substance/488184863
Canonical Smiles	C1=CC2=C(C(=C1)O)N=C(C=C2)C(=O)O
IUPAC Name	8-hydroxyquinoline-2-carboxylic acid
InChIKey	UHBIKXOBLZWFKM-UHFFFAOYSA-N
INCHI	1S/C10H7NO3/c12-8-3-1-2-6-4-5-7(10(13)14)11-9(6)8/h1-5,12H,(H,13,14)
Isomeric SMILES	C1=CC2=C(C(=C1)O)N=C(C=C2)C(=O)O
WGK Germany	3
RTECS	UZ9450000
Molecular Weight	189.17
Beilstein	146082
Reaxy-Rn	146082
Reaxys-RN_link_address	https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=146082&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

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✅ Certificate of Analysis (COA)

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📊 Datasheet

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

Kingdom Organic compounds
- Superclass Organoheterocyclic compounds
  - Class Quinolines and derivatives
    - Subclass Quinoline carboxylic acids

Kingdom	Organic compounds
Superclass	Organoheterocyclic compounds
Class	Quinolines and derivatives
Subclass	Quinoline carboxylic acids
Intermediate Tree Nodes	Not available
Direct Parent	Quinoline carboxylic acids
Alternative Parents	Hydroxyquinolines 8-hydroxyquinolines Pyridinecarboxylic acids 1-hydroxy-4-unsubstituted benzenoids 1-hydroxy-2-unsubstituted benzenoids Heteroaromatic compounds Monocarboxylic acids and derivatives Carboxylic acids Azacyclic compounds Organopnictogen compounds Organooxygen compounds Organonitrogen compounds Organic oxides Hydrocarbon derivatives
Molecular Framework	Aromatic heteropolycyclic compounds
Substituents	Quinoline-2-carboxylic acid - Hydroxyquinoline - 8-hydroxyquinoline - Pyridine carboxylic acid - Pyridine carboxylic acid or derivatives - 1-hydroxy-4-unsubstituted benzenoid - 1-hydroxy-2-unsubstituted benzenoid - Benzenoid - Pyridine - Heteroaromatic compound - Carboxylic acid derivative - Carboxylic acid - Monocarboxylic acid or derivatives - Azacycle - Organic nitrogen compound - Hydrocarbon derivative - Organooxygen compound - Organonitrogen compound - Organic oxide - Organopnictogen compound - Organic oxygen compound - Aromatic heteropolycyclic compound
Description	This compound belongs to the class of organic compounds known as quinoline carboxylic acids. These are quinolines in which the quinoline ring system is substituted by a carboxyl group at one or more positions.
External Descriptors	Not available
1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61. DOI: 10.1186/s13321-016-0174-y

3D Structure

Associated Targets(Human)

ALOX5 Tclin Arachidonate 5-lipoxygenase (6568 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

TYR Tclin Tyrosinase (717 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

MMP3 Tchem Matrix metalloproteinase 3 (3433 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

MMP8 Tchem Matrix metalloproteinase 8 (1942 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

GAPDH Tchem Glyceraldehyde-3-phosphate dehydrogenase liver (1284 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

MMP1 Tchem Matrix metalloproteinase-1 (7046 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

QPCT Tchem Glutaminyl-peptide cyclotransferase (1121 Activities)

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KDM4E Tchem Lysine-specific demethylase 4D-like (40243 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

GMNN Tbio Geminin (128009 Activities)

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KMT2A Tchem Histone-lysine N-methyltransferase MLL (17327 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

MBNL1 Tbio Muscleblind-like protein 1 (34431 Activities)

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BAZ2B Tchem Bromodomain adjacent to zinc finger domain protein 2B (56204 Activities)

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CGA Tbio Glycoprotein hormones alpha chain (29278 Activities)

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Associated Targets(non-human)

Nos2 Nitric oxide synthase, inducible (3573 Activities)

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Mmp2 Matrix metalloproteinase-2 (12 Activities)

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Mmp9 Matrix metalloproteinase 9 (38 Activities)

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lef Anthrax lethal factor (7585 Activities)

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blaVIM-2 Beta-lactamase VIM-2 (381 Activities)

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fba Fructose-bisphosphate aldolase (8 Activities)

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fba Putative fructose-1,6-bisphosphate aldolase (15559 Activities)

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ffp 4'-phosphopantetheinyl transferase ffp (24982 Activities)

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CIT2 Citrate synthase, peroxisomal (26 Activities)

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Mechanisms of Action

Certificates（CoA,COO,BSE/TSE and Analysis Chart)

C of A & Other Certificates(BSE/TSE, COO):

Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

6 results found

Lot Number	Certificate Type	Date	Item
G2219593	Certificate of Analysis	May 08, 2026	H167592
G2219594	Certificate of Analysis	May 08, 2026	H167592
L2008099	Certificate of Analysis	Sep 11, 2024	H167592
L2008097	Certificate of Analysis	Sep 11, 2024	H167592
D23142468	Certificate of Analysis	Jun 04, 2022	H167592
G2219595	Certificate of Analysis	Jun 04, 2022	H167592

Chemical and Physical Properties

Melt Point(°C)	211 °C
Molecular Weight	189.170 g/mol
XLogP3	1.700
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	1
Exact Mass	189.043 Da
Monoisotopic Mass	189.043 Da
Topological Polar Surface Area	70.400 Å²
Heavy Atom Count	14
Formal Charge	0
Complexity	231.000
Isotope Atom Count	0
Defined Atom Stereocenter Count	0
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	0
Undefined Bond Stereocenter Count	0
The total count of all stereochemical bonds	0
Covalently-Bonded Unit Count	1

Citations of This Product

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References

1. Siying Che, Yiwan Zhuge, Xinxiang Shao, Xiutan Peng, Haiyan Fu, Yuanbin She. (2024) A fluorescence ionic probe utilizing Cu2+ assisted competition for detecting glyphosate abused in green tea. FOOD CHEMISTRY, [PMID:38479145] [10.1016/j.foodchem.2024.138859]

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