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Methyllithium

Also known as: Methyllithium, Methyl lithium, Lithium methanide, Lithium methide, Lithium methyl, MeLi, Methyllithium solution

Methyllithium (CAS 917-54-4) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula CH3Li and a molecular weight of 21.97550 g/mol. Key properties include a melting point of 70-71ºC, a boiling point of 35ºC, a density of 0.85 g/mL at 20 °C and a flash point of -15.0 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H250 and H260. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.
917-54-4
Jingsj CID
J-43333-0
Molecular Formula
CH3Li
Molecular Weight
21.97550 g/mol
Category
Organic Compounds
Last updated
11/2/2026
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Physicochemical Properties

Melting Point70-71ºC
Boiling Point35ºC
Density0.85 g/mL at 20 °C
Flash Point-15.0 °C
Exact Mass22.03950
LogP0.58380
Additional Property3 (vs air)

GHS Safety & Compliance

Flammable / Corrosion / IrritantSignal word: Danger
  • H225 — Highly flammable liquid and vapour
  • H250
  • H260
  • H302 — Harmful if swallowed
  • H314 — Causes severe skin burns and eye damage
  • H336 — May cause drowsiness or dizziness

Frequently Asked Questions

What is the CAS number of Methyllithium?

The CAS number of Methyllithium is 917-54-4.

What are the molecular formula and molecular weight of Methyllithium?

Methyllithium has molecular formula CH3Li and molecular weight 21.97550 g/mol.

Is Methyllithium hazardous?

Methyllithium has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H250; H260.

What are the upstream and downstream products of Methyllithium?

For Methyllithium, Upstream Products: n-Butyllithium, iodomethane, Methyl bromide; Downstream Products: 1-(2-Chloropyrimidin-5-yl)ethanone, 2-(2-Chloropyrimidin-5-yl)propan-2-ol, 2-Phenyl-2-butanol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Methyllithium (CAS 917-54-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-43333-0 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.