Description

Phe-Leu-Glu-Glu-Ile Ammonium is a high-purity, synthetic pentapeptide ammonium salt with the sequence Phenylalanine-Leucine-Glutamic Acid-Glutamic Acid-Isoleucine. This compound is a critical building block and reference standard for advanced research and development in the life sciences. It is primarily utilized by pharmaceutical R&D teams, academic research institutions, and biotechnology companies engaged in peptide synthesis, metabolic studies, and biochemical assay development.

Application

• Pharmaceutical Research & Development: Serves as a key intermediate or reference standard in the synthesis and study of novel peptide-based therapeutics and active pharmaceutical ingredients (APIs).
• Biochemical Assay Development: Used as a substrate, inhibitor, or calibrant in enzymatic assays and other in-vitro diagnostic test development.
• Metabolic Pathway Studies: Employed in research focused on protein digestion, amino acid transport, and related metabolic processes.
• Academic & Institutional Research: A vital reagent for universities and research institutes conducting fundamental studies in biochemistry, molecular biology, and medicinal chemistry.
• Peptide Library Synthesis: Acts as a specific sequence component in the construction of combinatorial peptide libraries for drug discovery screening.
• Quality Control & Analytical Standards: Functions as a certified reference material (CRM) for the qualification and calibration of analytical equipment like HPLC and Mass Spectrometry in QC laboratories.

Basic Information

Product Name	Phe-Leu-Glu-Glu-Ile Ammonium
CAS No.	104180-31-6
Molecular Formula	C31H49N5O11 • xNH3
Molecular Weight	Contact for details
Synonyms	FLEEI Ammonium Salt; H-Phe-Leu-Glu-Glu-Ile-OH Ammonium Salt; Phenylalanyl-Leucyl-Glutamyl-Glutamyl-Isoleucine Ammonium; Ammonium 5-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-3-phenylpropanoyl]amino]-4-methylpentanoyl]amino]-4-carboxybutanoyl]amino]-4-carboxybutanoyl]amino]-3-methylpentanoate; L-Phenylalanine-L-leucine-L-glutamic acid-L-glutamic acid-L-isoleucine ammonium salt; Pentapeptide FLEEI ammonium; (S)-2-((S)-2-((S)-2-((S)-2-Amino-3-phenylpropanamido)-4-methylpentanamido)-4-carboxybutanamido)pentanedioic acid ammonium salt
EINECS	Contact for details

Quality Control

Our Phe-Leu-Glu-Glu-Ile Ammonium is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity, chiral analysis, and identity confirmation (IR, MS), to ensure it meets the high standards required for research and development. Certificates of Analysis (COA) with detailed chromatographic data are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept in a desiccated environment to maintain stability and purity. For long-term storage, consider storing under an inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC)	Conforms
Identification (MS)	Conforms
Purity (HPLC)	≥ 95.0%
Single Impurity (HPLC)	≤ 1.0%
Water Content (KF)	≤ 5.0%
Heavy Metals	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.