1,2-Ethanedithiol - ≥97% , CAS No.540-63-6

CAS: 540-63-6 Cat. No.: E106222 Formula: C2H6S2 Molecular Weight: 94.19 Beilstein Registry Number: 505946 EC Number: 208-752-3
AVAILABLE TO ORDER
GRADE & PURITY ≥97%
Synonyms
1,2-Dimercaptoethane | Ethylene mercaptan | Dithioglycol
Storage
Room temperature,Argon charged
Shipped In
Normal
★
Size
USA
Germany (EU)*
Price
Qty
25g
E106222-25g
8 In stock
—
$22.90
100g
E106222-100g
2 In stock
—
$66.90
500g
E106222-500g
In stock ≥10
6 In stock
$229.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥97% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature,Argon charged 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 111 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

1,2-Ethanedithiol (EDT) is an organosulfur compound that is used as an organic building block in chemical synthesis. It is also used as a ligand for metal ions to prepare metal complexes. 

Application:
1,2-Ethanedithiol can be used to synthesize:
1,3-Dithiolanes by reacting with aldehydes or ketones.
Dithiazepan-3-yl-alkanoic acids by cyclocondensation reaction with amino acids and formaldehyde.
EDT can also be used as a scavenger in solid phase peptide synthesis for the efficient deprotection of the peptide resin.

Specifications

Synonyms
1,2-Dimercaptoethane | Ethylene mercaptan | Dithioglycol
Specifications & Purity
≥97%
Biochemical and Physiological Mechanisms
1,2-Ethanedithiol is a metal complexing agent. It is a reagent for converting carbonyls to thioacetals under mild conditions, as well as reverses the inhibition of alphaketoaldehydes on mitosis in E. coli.
Storage
Room temperature,Argon charged
Shipped In
Normal
Purity
≥97%
Product Line
E106222-25g
Names and Identifiers
Pubchem Sid
Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/504752025
Canonical Smiles
C(CS)S
IUPAC Name
ethane-1,2-dithiol
InChIKey
VYMPLPIFKRHAAC-UHFFFAOYSA-N
INCHI
1S/C2H6S2/c3-1-2-4/h3-4H,1-2H2
Isomeric SMILES
C(CS)S
WGK Germany
3
RTECS
KI3325000
UN Number
3071
Molecular Weight
94.19
Beilstein
505946
Reaxy-Rn
505946
Reaxys-RN_link_address
https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=505946&ln=

Documentation

📋 Safety Data Sheet (SDS)

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

<<<<<<< HEAD Download SDS → ======= Download SDS → >>>>>>> release248-p3

✅ 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
SuperclassOrganosulfur compounds
ClassThiols
SubclassAlkylthiols
Intermediate Tree Nodes Not available
Direct ParentAlkylthiols
Alternative Parents Hydrocarbon derivatives  
Molecular FrameworkAliphatic acyclic compounds
Substituents Alkylthiol - Hydrocarbon derivative - Aliphatic acyclic compound
DescriptionThis compound belongs to the class of organic compounds known as alkylthiols. These are organic compounds containing the thiol functional group linked to an alkyl chain.
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.

26 results found

Lot NumberCertificate TypeDateItem
J2210372J2210372Certificate of AnalysisJul 03, 2026 E106222
J2620085J2620085Certificate of AnalysisMar 13, 2026 E106222
C2625422C2625422Certificate of AnalysisMar 13, 2026 E106222
C2625574C2625574Certificate of AnalysisMar 13, 2026 E106222
C2203244C2203244Certificate of AnalysisDec 16, 2025 E106222
J2522587J2522587Certificate of AnalysisOct 16, 2025 E106222
J2522582J2522582Certificate of AnalysisOct 16, 2025 E106222
G2106134G2106134Certificate of AnalysisApr 03, 2025 E106222
C2512704C2512704Certificate of AnalysisMar 03, 2025 E106222
C2512739C2512739Certificate of AnalysisMar 03, 2025 E106222
K2407359K2407359Certificate of AnalysisOct 31, 2024 E106222
K2407358K2407358Certificate of AnalysisOct 31, 2024 E106222
F2411376F2411376Certificate of AnalysisMay 28, 2024 E106222
F2421266F2421266Certificate of AnalysisMar 26, 2024 E106222
F2421257F2421257Certificate of AnalysisMar 26, 2024 E106222
C2422223C2422223Certificate of AnalysisMar 15, 2024 E106222
A2424174A2424174Certificate of AnalysisJan 15, 2024 E106222
A2424173A2424173Certificate of AnalysisJan 15, 2024 E106222
I2306438I2306438Certificate of AnalysisAug 18, 2023 E106222
I2306439I2306439Certificate of AnalysisAug 18, 2023 E106222
I2306440I2306440Certificate of AnalysisAug 18, 2023 E106222
J2210373J2210373Certificate of AnalysisSep 09, 2022 E106222
J2210456J2210456Certificate of AnalysisSep 09, 2022 E106222
H1801056H1801056Certificate of AnalysisJun 08, 2022 E106222
C2203239C2203239Certificate of AnalysisDec 27, 2021 E106222
C2203194C2203194Certificate of AnalysisDec 27, 2021 E106222
Chemical and Physical Properties
SolubilitySoluble in ethanol, acetone, ether, and benzene. Insoluble in water.
SensitivityAir Sensitive
Refractive Index1.559
Flash Point(°F)111.2 °F
Flash Point(°C)44℃
Boil Point(°C)146°C
Melt Point(°C)-41.2°C
Molecular Weight94.200 g/mol
XLogP30.800
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count2
Rotatable Bond Count1
Exact Mass93.9911 Da
Monoisotopic Mass93.9911 Da
Topological Polar Surface Area2.000 Ų
Heavy Atom Count4
Formal Charge0
Complexity6.000
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
Documents & Articles
A Complete Guide to Choosing Resins for SPPS (Solid-Phase Peptide Synthesis): Fmoc/Boc Routes, C-Terminal Acid/Amide, and a Key-Parameter Navigator
Self-Assembled Monolayers (SAMs): Selection & Methodology Process Window and Verification/Troubleshooting Along the Alkanethiol/Au Route (with Selection Guide and Product Tables 1–3)
Decision Logic for Peptide Synthesis Routes: Applicability and Criteria for Choosing among SPPS, LPPS, and Recombinant Expression
Boc₂O Selection Cannot Be Judged by Protection Installation Alone: Experimental Decision-Making from Substrate Nucleophilicity and Medium Effects to Deprotection Pathways
How to Troubleshoot Abnormal Impurities in Peptide Synthesis? Locating Process Issues Through Amino-Related Side Reactions
Formation and Control of Carboxyl- and Hydroxyl-Related Impurities in Peptide Synthesis — Using Asp/Glu and Ser/Thr Residue Side Reactions as Examples
Route Selection for Thiol Synthesis: C–S Bond Construction, Sulfur Source Forms, and Thiol Release
Citations of This Product
Solution Calculators
Reviews

Customer Reviews

Frequently Asked Questions

What is the purity of this product?
This product is supplied at ≥97% purity (chemical assay). Lot-specific values are stated on the Certificate of Analysis.
How should this product be stored?
Store at room temperature under argon. It is supplied under an argon blanket; reseal under inert gas after each use.
How is this product shipped?
This product ships under standard ambient conditions. No temperature-controlled packaging is required.
What are the CAS number, molecular formula and molecular weight?
The CAS Number is 540-63-6, the molecular formula is C2H6S2, and the molecular weight is 94.19 g/mol. InChIKey VYMPLPIFKRHAAC-UHFFFAOYSA-N.
What documentation is provided?
Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.

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