Humic acid, sodium salt - AR , CAS No.68131-04-4

CAS: 68131-04-4 Cat. No.: H102874 EC Number: 268-608-0
AVAILABLE TO ORDER
GRADE & PURITY AR ? Analytical Reagent grade — high-purity chemicals meeting strict assay limits for lab analysis. Use when accuracy matters and trace impurities could skew results.
Synonyms
NaHA | disodium bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate | F88108 | FS-10466 | SCHEMBL3278537 | disodium;bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate | C9H8Na2O4 | Sodium bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate | Disodium bicyclo[2.2.1]hept-5-en-2,3-di
Storage
Desiccated,Room temperature
Shipped In
Normal
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Size
Status
Price
Qty
500g
H102874-500g
1

$17.90

$25.90
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Why this grade

AR AR for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Desiccated,Room temperature Ships Normal Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 60 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

Humic acid sodium salt is a complex mixture of multiple acids, which functions as a dibasic or tribasic acid. Structurally, Humic acid sodium salt is composed of carboxyl and phenolate groups, which result in this dibasic nature. This acid mixture is usually found in dead organic matter via biodegradation. Humic acid sodium salt can protonate carboxyl groups at a pK1 value of 4 and protonate phenolate groups at a pK1 value of 8. It is known that Humic acid sodium salt is important in regulating the bioavailability of metal ions as a result of its chelating properties to metal ions.
A principal component of humic substances

Specifications

Synonyms
NaHA | disodium bicyclo[2.2.1]hept-5-ene-2, 3-dicarboxylate | F88108 | FS-10466 | SCHEMBL3278537 | disodium;bicyclo[2.2.1]hept-5-ene-2, 3-dicarboxylate | C9H8Na2O4 | Sodium bicyclo[2.2.1]hept-5-ene-2, 3-dicarboxylate | Disodium bicyclo[2.2.1]hept-5-en-2, 3-di
Specifications & Purity
AR
Storage
Desiccated, Room temperature
Shipped In
Normal
Grade
AR
Names and Identifiers
Pubchem Sid504769084
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504769084
Canonical SmilesC1C2C=CC1C(C2C(=O)[O-])C(=O)[O-].[Na+].[Na+]
IUPAC Namedisodium;bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate
InChIKeyHMGUIQPKFUZDPV-UHFFFAOYSA-L
INCHI1S/C9H10O4.2Na/c10-8(11)6-4-1-2-5(3-4)7(6)9(12)13;;/h1-2,4-7H,3H2,(H,10,11)(H,12,13);;/q;2*+1/p-2
Isomeric SMILES C1C2C=CC1C(C2C(=O)[O-])C(=O)[O-].[Na+].[Na+]
WGK Germany 3
RTECS MT6550000
Reaxy-Rn 13931453
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=13931453&ln=

Documentation

📋 Safety Data Sheet (SDS)

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

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✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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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

KingdomOrganic compounds
SuperclassOrganic acids and derivatives
ClassCarboxylic acids and derivatives
SubclassDicarboxylic acids and derivatives
Intermediate Tree Nodes Not available
Direct ParentDicarboxylic acids and derivatives
Alternative Parents Carboxylic acid salts  Carboxylic acids  Organic sodium salts  Organic oxides  Hydrocarbon derivatives  Carbonyl compounds  Organic cations  
Molecular FrameworkAliphatic homopolycyclic compounds
Substituents Dicarboxylic acid or derivatives - Carboxylic acid salt - Organic alkali metal salt - Carboxylic acid - Organic oxygen compound - Organic oxide - Hydrocarbon derivative - Organic sodium salt - Organic salt - Organooxygen compound - Carbonyl group - Organic cation - Aliphatic homopolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as dicarboxylic acids and derivatives. These are organic compounds containing exactly two carboxylic acid groups.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





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.

16 results found

Lot NumberCertificate TypeDateItem
F2215244Certificate of AnalysisMar 18, 2026 H102874
F2215245Certificate of AnalysisMar 18, 2026 H102874
A2627004Certificate of AnalysisMay 10, 2025 H102874
A2629428Certificate of AnalysisMay 10, 2025 H102874
A2629429Certificate of AnalysisMay 10, 2025 H102874
A2629430Certificate of AnalysisMay 10, 2025 H102874
E2523220Certificate of AnalysisMay 10, 2025 H102874
E2523296Certificate of AnalysisMay 10, 2025 H102874
E2523310Certificate of AnalysisMay 10, 2025 H102874
E2523353Certificate of AnalysisMay 10, 2025 H102874
I2511330Certificate of AnalysisMay 10, 2025 H102874
I2511331Certificate of AnalysisMay 10, 2025 H102874
I2511332Certificate of AnalysisMay 10, 2025 H102874
I2511362Certificate of AnalysisMay 10, 2025 H102874
B2108015Certificate of AnalysisDec 05, 2024 H102874
E2231296Certificate of AnalysisMar 21, 2022 H102874

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Chemical and Physical Properties
Melt Point(°C)300°C
Molecular Weight226.140 g/mol
XLogP3
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count4
Rotatable Bond Count0
Exact Mass226.022 Da
Monoisotopic Mass226.022 Da
Topological Polar Surface Area80.300 Ų
Heavy Atom Count15
Formal Charge0
Complexity255.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count4
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count3
Citations of This Product
References
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58. Rui Zhang, Shaoyin Peng, Zhenbei Wang, Fei Qi, Chen Li, Yatao Liu, Fan Li, Amir Ikhlaq, Jolanta Kumirska, Ewa Maria Siedlecka, Oksana Ismailova, Zukhra Kadirova.  (2025)  Mechanistic insights for DOM removal and membrane fouling mitigation: Optimizing Ferrate(VI)/AlCl₃ pretreatment and revealing the synergistic effect.  CHEMICAL ENGINEERING JOURNAL,      [PMID:] [10.1016/j.cej.2025.170406]
59. Juanjuan Zhou, Yan Xia, Zhanjun Li.  (2025)  Multicycle Calcined Regeneration of Nano-MgO and Phosphate Accumulation from Humic Acid–Contaminated Wastewater.  JOURNAL OF ENVIRONMENTAL ENGINEERING,  151  (11): (04025070).  [PMID:] [10.1061/JOEEDU.EEENG-8034]
60. Wu Wei, Ma Xiaoqian, Wang Rui, Hao Mengqi.  (2026)  The effect of electrostatic interaction and wettability of Fe3O4 nano-composites on demulsification of O/W (hexadecane) nanoemulsion.  WATER SCIENCE AND TECHNOLOGY,      [PMID:] [10.2166/wst.2026.228]
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