[Leu5]-Enkephalin

Also known as: Leu-Enkephalin, Leu5-Enkephalin, Leucine enkephalin, Leucyl-enkephalin, L-Tyr-Gly-Gly-Phe-Leu-OH, Tyr-Gly-Gly-Phe-Leu, YGGFL, H-Tyr-Gly-Gly-Phe-Leu-OH, Enkephalin L, Leucine-enkephalin (human, porcine, bovine, rat, mouse), ICI-114740, MFCD00076406, SGS 518 oxalate

[Leu5]-Enkephalin (CAS 58822-25-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C28H37N5O7 and a molecular weight of 555.62300 g/mol. Key properties include a boiling point of 998.8ºC at 760 mmHg, a density of 1.274 g/cm3 and a flash point of 557.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 58822-25-6
Jingsj CID: J-10338-5
Molecular Formula: C₂₈H₃₇N₅O₇
Molecular Weight: 555.62300 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Boiling Point	998.8ºC at 760 mmHg
Density	1.274 g/cm3
Flash Point	557.8ºC
Exact Mass	555.26900
PSA	199.95000
LogP	2.10130
Refractive Index	1.586
Storage Conditions	-20°C
Additional Property	Soluble in water (1 mg/ml ).

Activity & Biological Data

Target	Opioid receptors[1]
Additional Information	[1]. Leu-enkephalin is a five amino acid endogenous peptide that acts as an agonist at opioid receptors. [2]. Meunier JC, et al. Binding of Leu5-enkephalin and Met5-enkephalin to a particulate fraction from rat cerebrum. FEBS Lett. 1977 May 15;77(2):209-13.

Frequently Asked Questions

What is the CAS number of [Leu5]-Enkephalin?

The CAS number of [Leu5]-Enkephalin is 58822-25-6.

What are the molecular formula and molecular weight of [Leu5]-Enkephalin?

[Leu5]-Enkephalin has molecular formula C28H37N5O7 and molecular weight 555.62300 g/mol.

What are the upstream and downstream products of [Leu5]-Enkephalin?

For [Leu5]-Enkephalin, Downstream Products: L-Leucine, L-Tyrosine, DL-Leucine.

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

Last updated: 8/21/2026

How to cite: Jingsj. "[Leu5]-Enkephalin (CAS 58822-25-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-10338-5 (accessed 2026-11-06).

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