Ethyl 3,4-Dihydroxybenzoate - ≥98% , CAS No.3943-89-3

CAS: 3943-89-3 Cat. No.: E133835 Molecular Weight: 182.18 EC Number: 223-529-0
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
F0001-1109 | Trimellitic anhydride acid chloride | Tox21_113836 | W-106433 | XV6ER0C1DT | Protocatechuic acid ethyl ester, 97% | BDBM50428394 | InChI=1/C9H10O4/c1-2-13-9(12)6-3-4-7(10)8(11)5-6/h3-5,10-11H,2H2,1H | PS-4053 | DTXSID2057732 | EDHB | Ethyl 3,
Storage
Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
5g
E133835-5g
6
$9.90
10g
E133835-10g
6
$10.90
25g
E133835-25g
7
$11.90
50g
E133835-50g
2

$19.90

$29.90
Save $10.00 (33.44%)
100g
E133835-100g
2

$38.90

$58.90
Save $20.00 (33.96%)
500g
E133835-500g
1

$98.90

$148.90
Save $50.00 (33.58%)
Enter a quantity for the sizes you want to add.
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Why this grade

≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature Ships Normal 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.

Overview

Ethyl 3,4-Dihydroxybenzoate is an antioxidant compound. It also exhibits anti-inflammatory, anti-parasitic, antibacterial, anti-metastatic, and anticancer activities. Protocatechuic acid inhibits TNF-induced expression and release of adhesion molecules and pro-inflammatory cytokines as well as ADP-induced expression of platelet P-selectin. This compound increases quinone reductase activity and acts as a radical scavenger. Protocatechuic acid ethyl ester inhibits RhoB activation, decreasing expression of matrix metalloproteinase 2 (MMP2) and inactivating NF-κB and also inhibits human topoisomerase II.
An antioxidant

Specifications

Synonyms
F0001-1109 | Trimellitic anhydride acid chloride | Tox21_113836 | W-106433 | XV6ER0C1DT | Protocatechuic acid ethyl ester, 97% | BDBM50428394 | InChI=1/C9H10O4/c1-2-13-9(12)6-3-4-7(10)8(11)5-6/h3-5, 10-11H, 2H2, 1H | PS-4053 | DTXSID2057732 | EDHB | Ethyl 3,
Specifications & Purity
≥98%
Biochemical and Physiological Mechanisms
Phenolic compound. Substrate analog and competitive inhibitor of prolyl 4-hydroxylase. Protocatechuic acid ( Asc 2937 ) derivative. Shows cardioprotective, neuroprotective and antimicrobial effects in vivo.
Storage
Room temperature
Shipped In
Normal
Action Type
ACTIVATOR
Note
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour. Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.
Purity
≥98%
Names and Identifiers
Pubchem Sid488185422
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488185422
Canonical SmilesCCOC(=O)C1=CC(=C(C=C1)O)O
IUPAC Nameethyl 3,4-dihydroxybenzoate
InChIKeyKBPUBCVJHFXPOC-UHFFFAOYSA-N
INCHI1S/C9H10O4/c1-2-13-9(12)6-3-4-7(10)8(11)5-6/h3-5,10-11H,2H2,1H3
Isomeric SMILES CCOC(=O)C1=CC(=C(C=C1)O)O
WGK Germany 3
Molecular Weight 182.18
Reaxy-Rn 2097435
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=2097435&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
SuperclassBenzenoids
ClassBenzene and substituted derivatives
SubclassBenzoic acids and derivatives
Intermediate Tree Nodes Benzoic acid esters - p-Hydroxybenzoic acid esters
Direct Parentp-Hydroxybenzoic acid alkyl esters
Alternative Parents m-Hydroxybenzoic acid esters  Hydroxybenzoic acid derivatives  Catechols  Benzoyl derivatives  1-hydroxy-4-unsubstituted benzenoids  1-hydroxy-2-unsubstituted benzenoids  Carboxylic acid esters  Monocarboxylic acids and derivatives  Organooxygen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic homomonocyclic compounds
Substituents P-hydroxybenzoic acid alkyl ester - M-hydroxybenzoic acid ester - Dihydroxybenzoic acid - Benzoyl - Catechol - 1-hydroxy-4-unsubstituted benzenoid - 1-hydroxy-2-unsubstituted benzenoid - Phenol - Carboxylic acid ester - Monocarboxylic acid or derivatives - Carboxylic acid derivative - Organooxygen compound - Organic oxygen compound - Hydrocarbon derivative - Organic oxide - Aromatic homomonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as p-hydroxybenzoic acid alkyl esters. These are aromatic compounds containing a benzoic acid, which is esterified with an alkyl group and para-substituted with a hydroxyl group.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Associated Targets(Human)
CA1 Tclin Carbonic anhydrase 1 (1 Activities)
Activity TypeActivity Value -log(M)Mechanism of ActionActivity ReferencePublications (PubMed IDs)
CA2 Tclin Carbonic anhydrase 2 (1 Activities)
Activity TypeActivity Value -log(M)Mechanism of ActionActivity ReferencePublications (PubMed IDs)
CA12 Tclin Carbonic anhydrase 12 (1 Activities)
Activity TypeActivity Value -log(M)Mechanism of ActionActivity ReferencePublications (PubMed IDs)
CA14 Tclin Carbonic anhydrase 14 (1 Activities)
Activity TypeActivity Value -log(M)Mechanism of ActionActivity ReferencePublications (PubMed IDs)
CA9 Tclin Carbonic anhydrase 9 (1 Activities)
Activity TypeActivity Value -log(M)Mechanism of ActionActivity ReferencePublications (PubMed IDs)
CA7 Tclin Carbonic anhydrase 7 (1 Activities)
Activity TypeActivity Value -log(M)Mechanism of ActionActivity ReferencePublications (PubMed IDs)
CA2 Tclin Carbonic anhydrase II (17698 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
CA1 Tclin Carbonic anhydrase I (13240 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
CA14 Tclin Carbonic anhydrase XIV (1305 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
CA12 Tclin Carbonic anhydrase XII (6231 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
CA9 Tclin Carbonic anhydrase IX (8255 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Associated Targets(non-human)
Ca7 Carbonic anhydrase VII (3 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Coxsackievirus B3 (1096 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
MDCK (10148 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Vero (26788 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
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.

14 results found

Lot NumberCertificate TypeDateItem
G2403532Certificate of AnalysisApr 03, 2026 E133835
G2403533Certificate of AnalysisApr 03, 2026 E133835
G2403534Certificate of AnalysisApr 03, 2026 E133835
E2220109Certificate of AnalysisDec 12, 2025 E133835
E2220118Certificate of AnalysisDec 12, 2025 E133835
E2220126Certificate of AnalysisDec 12, 2025 E133835
E2220127Certificate of AnalysisDec 12, 2025 E133835
E2220128Certificate of AnalysisDec 12, 2025 E133835
C2320443Certificate of AnalysisJan 15, 2025 E133835
D2301018Certificate of AnalysisJan 15, 2025 E133835
G2403535Certificate of AnalysisMay 11, 2024 E133835
K1709063Certificate of AnalysisMay 10, 2023 E133835
G1521027Certificate of AnalysisFeb 03, 2023 E133835
E2220123Certificate of AnalysisMar 17, 2022 E133835

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Chemical and Physical Properties
SolubilitySoluble in Methanol
Melt Point(°C)133 °C
Molecular Weight182.170 g/mol
XLogP31.800
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count4
Rotatable Bond Count3
Exact Mass182.058 Da
Monoisotopic Mass182.058 Da
Topological Polar Surface Area66.800 Ų
Heavy Atom Count13
Formal Charge0
Complexity180.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Solution Calculators
Reviews

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