Ethyl Hydrogen Maleate - ≥95%(T) , CAS No.3990-03-2

CAS: 3990-03-2 Cat. No.: Z135126 Molecular Weight: 144.13 EC Number: 223-635-7
AVAILABLE TO ORDER
GRADE & PURITY ≥95%(T)
Synonyms
Maleinsaureathylester | (2Z)-2-Butenedioic Acid 1-Ethyl Ester | Maleic acid, monoethyl ester | Thulol | 2-Butenedioic acid (2Z)-, monoethyl ester | maleic acid, ethyl ester | M0614 | Sipomer MEM | T-2 | UNII-AK5N1DQX7U | Maleic Acid Monoethyl Ester | (~{Z
Storage
Store at 2-8°C
Shipped In
Wet ice
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
25ml
Z135126-25ml
3
$74.90
100ml
Z135126-100ml
3

$85.90

$156.90
Save $71.00 (45.25%)
500ml
Z135126-500ml
1
$342.90
Enter a quantity for the sizes you want to add.
🧪

Why this grade

≥95%(T) for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Store at 2-8°C Ships Wet ice Check lot-specific COA for exact specifications.

📋

Quality documents

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

📚

Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
Maleinsaureathylester | (2Z)-2-Butenedioic Acid 1-Ethyl Ester | Maleic acid, monoethyl ester | Thulol | 2-Butenedioic acid (2Z)-, monoethyl ester | maleic acid, ethyl ester | M0614 | Sipomer MEM | T-2 | UNII-AK5N1DQX7U | Maleic Acid Monoethyl Ester | (~{Z
Specifications & Purity
≥95%(T)
Storage
Store at 2-8°C
Shipped In
Wet ice
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥95%(T)
Names and Identifiers
Pubchem Sid504763670
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504763670
Canonical SmilesCCOC(=O)C=CC(=O)O
IUPAC Name(Z)-4-ethoxy-4-oxobut-2-enoic acid
InChIKeyXLYMOEINVGRTEX-ARJAWSKDSA-N
INCHI1S/C6H8O4/c1-2-10-6(9)4-3-5(7)8/h3-4H,2H2,1H3,(H,7,8)/b4-3-
Isomeric SMILES CCOC(=O)/C=C\C(=O)O
RTECS EM6538750
Molecular Weight 144.13
Reaxy-Rn 10061275
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=10061275&ln=

Documentation

📋 Safety Data Sheet (SDS)

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

Download SDS →

✅ Certificate of Analysis (COA)

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

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassLipids and lipid-like molecules
ClassFatty Acyls
SubclassFatty acid esters
Intermediate Tree Nodes Not available
Direct ParentFatty acid esters
Alternative Parents Unsaturated fatty acids  Dicarboxylic acids and derivatives  Enoate esters  Carboxylic acids  Organic oxides  Hydrocarbon derivatives  Carbonyl compounds  
Molecular FrameworkAliphatic acyclic compounds
Substituents Fatty acid ester - Unsaturated fatty acid - Dicarboxylic acid or derivatives - Alpha,beta-unsaturated carboxylic ester - Enoate ester - Carboxylic acid ester - Carboxylic acid - Carboxylic acid derivative - Organic oxygen compound - Organic oxide - Hydrocarbon derivative - Organooxygen compound - Carbonyl group - Aliphatic acyclic compound
DescriptionThis compound belongs to the class of organic compounds known as fatty acid esters. These are carboxylic ester derivatives of a fatty acid.
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.

5 results found

Lot NumberCertificate TypeDateItem
L1804116Certificate of AnalysisFeb 05, 2026 Z135126
H2519104Certificate of AnalysisAug 27, 2025 Z135126
F1713038Certificate of AnalysisJan 24, 2023 Z135126
L1804117Certificate of AnalysisAug 09, 2022 Z135126
J1809084Certificate of AnalysisJun 17, 2022 Z135126
Chemical and Physical Properties
SensitivityHeat Sensitive
Refractive Index1.46
Molecular Weight144.120 g/mol
XLogP30.200
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count4
Rotatable Bond Count4
Exact Mass144.042 Da
Monoisotopic Mass144.042 Da
Topological Polar Surface Area63.600 Ų
Heavy Atom Count10
Formal Charge0
Complexity159.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count1
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds1
Covalently-Bonded Unit Count1
Solution Calculators
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