Description

H-Arg-Arg-Arg-Arg-Arg-Arg-Arg-OH is a synthetic heptapeptide composed of seven consecutive arginine residues, a structure that confers strong cationic and cell-penetrating properties. This compound is highly significant for research and development in advanced drug delivery systems and molecular biology. It is primarily needed by biotechnology, pharmaceutical R&D, and diagnostic reagent manufacturers for applications requiring efficient intracellular transport.

Application

• Cell-Penetrating Peptide (CPP) Research: As a model cationic CPP for studying mechanisms of cellular uptake and intracellular trafficking.
• Drug Delivery Vector: Conjugation with therapeutic agents (e.g., nucleic acids, proteins, small molecules) to enhance their cellular membrane permeability and bioavailability.
• Bioconjugation & Protein Labeling: Used as a polyarginine tag to facilitate the purification or fluorescent labeling of proteins and other biomolecules.
• Biomaterial & Nanocarrier Development: Functionalization of nanoparticles, liposomes, or hydrogels to improve targeting and cellular interaction.
• Diagnostic Probe Development: Serving as a carrier for imaging agents to improve their delivery into cells for diagnostic assays.
• Antimicrobial Peptide Studies: Investigation of structure-activity relationships in cationic antimicrobial peptides.

Basic Information

Product Name	H-Arg-Arg-Arg-Arg-Arg-Arg-Arg-OH
CAS No.	165893-48-1
Molecular Formula	C42H84N28O8
Molecular Weight	1085.3 g/mol
Synonyms	Heptaarginine; Polyarginine (R7); Arg7; H-Arg-Arg-Arg-Arg-Arg-Arg-Arg-OH; R7 Peptide; (Arg)7; Cell-Penetrating Peptide R7; L-Arginine Heptapeptide; Poly-L-arginine (n=7); Hepta-L-arginine
EINECS	Contact for details

Quality Control

Our H-Arg-Arg-Arg-Arg-Arg-Arg-Arg-OH is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity, MS for identity confirmation, and tests for residual solvents and endotoxins where applicable. We provide full traceability and Certificates of Analysis (COA) are available upon request to ensure compliance with your research and development specifications.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below in a dry environment. This product is hygroscopic (moisture-sensitive). Allow the vial to equilibrate to room temperature in a desiccator before opening to minimize moisture uptake.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC/MS)	Conforms
Purity (HPLC)	≥ 95%
Single Impurity (HPLC)	≤ 1.0%
Amino Acid Composition	Conforms
Water Content (KF)	≤ 5.0%
Acetate Content (HPLC)	≤ 10.0%

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