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Organometallic compounds

2-Thienyllithium

Also known as 2-lithiothiophene, lithium, 2H-thiophen-2-ide, Thiophen-2-yllithium

CAS 2786-07-4Formula C4H3LiSMolar mass 90.08 g/molEC 220-504-6
GHS signal word: Danger. Pictograms: Flammable, Corrosive, Harmful or irritant
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2-Thienyllithium chemical structure, C4H3LiS, CAS 2786-07-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2786-07-4
Formula
C4H3LiS
Molar mass
90.08 g/mol
EC number
220-504-6
HS code
293499
Category
Organometallic compounds

What is 2-Thienyllithium?

Plain description, key identifiers and synonyms

2-Thienyllithium is a chemical substance with the molecular formula C4H3LiS and a molar mass of 90.08 g/mol. Its CAS registry number is 2786-07-4. The IUPAC name is lithium 2H-thiophen-2-ide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
lithium 2H-thiophen-2-ide
CAS number
2786-07-4 CAS number cross-checked
EC number
220-504-6
Molecular formula
C4H3LiS
InChIKey
SNHOZPMHMQQMNI-UHFFFAOYSA-N
InChI
InChI=1S/C4H3S.Li/c1-2-4-5-3-1;/h1-3H;/q-1;+1
SMILES (canonical and isomeric)
[Li+].C1=CS[C-]=C1

Synonyms

  • 2-lithiothiophene
  • lithium, 2H-thiophen-2-ide
  • Thiophen-2-yllithium
  • 2-thienyl lithium
  • Lithium, 2-thienyl-
  • lithium thiophen-2-ide
  • lithiothiophene
  • thienyllithium
  • Thienyl lithium
  • 2-thienyl-lithium
  • (2-thienyl)-lithium

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
90.08 g/molcalc.
Exact mass
90.0116 Dacalc.
LogP (octanol/water)
-1.45calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccsc1

c1ccsc1

1 ring, 5 atoms, the Thiophene ring system.

22,643 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H250Catches fire spontaneously if exposed to air.
  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H314Causes severe skin burns and eye damage.
  • H318Causes serious eye damage.
  • H332Harmful if inhaled.
Precautionary statements (27)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P222Do not allow contact with air.
  • P231Handle and store contents under inert gas.
  • P233Keep container tightly closed.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P335 + P334If on skin: Brush off loose particles from skin. Immerse in cool water or wrap in wet bandages.
  • P302 + P352If on skin: Wash with plenty of water.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P363Wash contaminated clothing before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

2-Thienyllithium suppliers

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2-Thienyllithium price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 2-Thienyllithium is traded under.

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for 2-Thienyllithium is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 2-Thienyllithium, based on the data on this page

What is 2-Thienyllithium?

2-Thienyllithium is a chemical substance with the molecular formula C4H3LiS and a molar mass of 90.08 g/mol. Its CAS registry number is 2786-07-4. The IUPAC name is lithium 2H-thiophen-2-ide.

What is the CAS number of 2-Thienyllithium?

The CAS registry number of 2-Thienyllithium is 2786-07-4.

What is the molecular formula and weight of 2-Thienyllithium?

The molecular formula of 2-Thienyllithium is C4H3LiS and its molar mass is 90.08 g/mol.

Is 2-Thienyllithium hazardous?

2-Thienyllithium carries the GHS signal word "Danger". Main hazards: catches fire spontaneously if exposed to air, harmful if swallowed, harmful in contact with skin. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 2-Thienyllithium?

2-Thienyllithium is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 2-Thienyllithium?

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What is the price of 2-Thienyllithium?

Suppliers quote 2-Thienyllithium on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle 2-Thienyllithium

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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