L-Carnitine — Compound Overview
A researcher-focused overview of L-carnitine: what the compound is, its chemistry, how it appears in the published literature, and how Index Peptides documents each batch.
Last updated: 2026-08-21 · By: Index Peptides technical team
Key facts
| Compound | L-Carnitine |
|---|---|
| CAS number | 541-15-1 |
| Molecular formula | C7H15NO3 |
| Molecular weight | 161.2 g/mol |
| Supplied formats | 10ml liquid · 500mg/ml |
| Intended use | In-vitro laboratory research only |
What is L-carnitine?
L-Carnitine is a naturally occurring quaternary ammonium compound involved in fatty-acid transport biochemistry. Index Peptides supplies it as a ready-to-use 10ml liquid research solution at 500mg/ml concentration, with identity verified per batch.
In this context L-carnitine is supplied strictly as a laboratory research material, not for human or animal consumption.
L-Carnitine in the research literature
L-Carnitine appears across a very large biochemistry and cell-biology literature concerned with mitochondrial fatty-acid metabolism and related analytical work. Index Peptides takes no position on any application and supplies the material for laboratory research only.
Form, handling and storage
L-Carnitine is supplied as a ready-to-use liquid solution in a sealed vial. Store as directed on the batch record; stability data are batch-specific and recorded against the batch.
Batch documentation at Index Peptides
Every released batch of L-carnitine is identity verified, with documentation published on the product page and verifiable by lot number through the batch lookup tool.
Frequently asked questions
Is L-carnitine approved for human use?
As a supplement it is widely sold in other markets, but Index Peptides supplies it strictly for laboratory research — not for human or animal consumption, administration or any in-vivo use.
What is the CAS number for L-carnitine?
541-15-1, with a molecular weight of approximately 161.2 g/mol.
How is each batch verified?
Identity is verified per batch with documentation published on the product page, and any batch can be checked by lot number on the verify page.
How do I reconstitute L-Carnitine?
Reconstitution is a laboratory handling procedure, not a use instruction. Our documentation-led reconstitution guide covers the mechanics of dissolving lyophilised peptide powders: https://indexpeptides.uk/guides/peptide-reconstitution-guide. Handling is the responsibility of the qualified researcher.
What is the shelf life of L-Carnitine?
L-Carnitine is supplied as a liquid. Storage follows the label, and stability is documented per batch on the certificate of analysis; treat the batch record as the authoritative reference for that lot.
What is the difference between the sizes?
The difference is the nominal peptide content per vial. L-Carnitine is supplied as 10ml liquid at 500mg/ml. Every format carries the same batch documentation and purity testing.
What does the certificate of analysis show?
Every released batch of L-Carnitine is documented with its certificate of analysis: the purity results, identity confirmation and the lot number, published on the product page and checkable through the batch lookup tool. The COA is the authoritative record for that batch.
References
Research use only. Not for human or animal consumption.