Is MK 677 a Peptide Technical Deep Dive on Purity Specifications Manufacturing and Sourcing for Labs

Introduction

In the rapidly evolving landscape of research peptides and cosmetic raw materials, one compound frequently generates technical debate: is mk 677 a peptide? This question is critical for laboratory procurement officers, cosmetic formulation scientists, and bulk raw material buyers who require precise molecular classification to ensure regulatory compliance and product efficacy. MK-677, also known as Ibutamoren, is a growth hormone secretagogue that mimics the action of ghrelin. While it is often grouped with peptides in commercial catalogs, its chemical structure as a non-peptide small molecule demands careful technical scrutiny. This article delivers a deep, E-E-A-T compliant analysis of MK-677’s molecular identity, purity specifications, manufacturing protocols, and sourcing best practices for professional B2B buyers.

Core Molecular Specs & Technical Index

Understanding the fundamental properties of MK-677 is essential for any laboratory considering its integration into research or formulation workflows. The compound’s technical profile directly impacts handling, stability, and experimental reproducibility.

Basic Properties and Classification

MK-677 (Ibutamoren mesylate) has a molecular formula of C27H36N4O5S·CH4O3S and a molecular weight of approximately 624.77 g/mol. It is a white to off-white crystalline powder. Critically, it is not a peptide; it is a synthetic small molecule that acts as a ghrelin receptor agonist. This distinction is vital for labs that must classify compounds correctly for internal documentation and regulatory reporting.

Purity and Solubility Specifications

• Purity Grade: Standard research grade is ≥98% by HPLC, with premium grades reaching ≥99% for advanced studies.
• Solubility: Freely soluble in DMSO and ethanol; sparingly soluble in water. For aqueous formulations, use of co-solvents is recommended.
• Storage Conditions: Store at -20°C in a desiccated, light-protected environment. Long-term stability is maintained for 24 months under these conditions.
• Appearance: White to off-white crystalline powder, free of visible aggregates or discoloration.
• Heavy Metal Content: Compliant with ICH Q3D guidelines, with lead, arsenic, cadmium, and mercury levels below 1 ppm each.

Industry data from the 2023 Peptide & Small Molecule Quality Report indicates that 78% of laboratory procurement managers prioritize HPLC purity certificates over price when sourcing compounds like MK-677, reflecting a market shift toward verified quality over cost savings.

Manufacturing & Quality Control

The production of high-purity MK-677 involves a multi-step synthetic process that demands rigorous quality control at every stage. Laboratories sourcing this compound must understand the manufacturing chain to evaluate supplier reliability.

Production Process

MK-677 is synthesized via a convergent organic synthesis route, typically starting from a substituted benzamide core. The process involves amide coupling, sulfonylation, and final salt formation with methanesulfonic acid. Each intermediate is purified by column chromatography or recrystallization to ensure minimal by-product carryover.

Purification and Analytical Testing

After synthesis, the crude product undergoes preparative HPLC purification to achieve target purity. The final material is then subjected to a battery of tests:

• HPLC (High-Performance Liquid Chromatography): Confirms purity and identifies any residual solvents or impurities.
• Mass Spectrometry (MS): Verifies molecular weight and structural integrity.
• NMR (Nuclear Magnetic Resonance): Provides structural confirmation and detects stereochemical impurities.
• Residual Solvent Analysis (GC): Ensures solvents like methanol or ethyl acetate are below ICH limits.
• Heavy Metal Testing (ICP-MS): Validates compliance with pharmacopeial standards.

Third-Party Certification

Reputable suppliers provide a Certificate of Analysis (CoA) from an independent GMP-compliant laboratory. This document should include batch number, purity percentage, retention time, and all impurity peaks. For B2B buyers, requesting a CoA from a third-party lab is a non-negotiable step in supplier qualification.

Commercial Application Scenarios

MK-677’s unique mechanism as a ghrelin mimetic opens several commercial applications, particularly in cosmetic formulation and laboratory research. Understanding these scenarios helps buyers align their sourcing with end-use requirements.

Cosmetic Formulation

In the cosmetic industry, MK-677 is explored for its potential to support dermal matrix maintenance. Formulators incorporate it into anti-aging serums and creams at low concentrations (typically 0.1-0.5%). The compound’s stability in lipid-based carriers makes it suitable for oil-in-water emulsions. However, formulators must verify that the raw material is free of endotoxins and microbial contaminants to meet cosmetic safety standards.

Lab Research

Academic and pharmaceutical research labs use MK-677 to study growth hormone pathways, muscle metabolism, and bone density regulation. In these settings, purity above 99% is often required to eliminate confounding variables. Researchers typically dissolve the compound in DMSO for in vitro assays or formulate it in a vehicle for animal studies.

Bulk Wholesale Usage

Bulk buyers, such as peptide distributors and contract research organizations, purchase MK-677 in quantities ranging from 10 grams to several kilograms. These buyers prioritize consistent batch-to-batch purity, detailed documentation, and reliable supply chains. They often require custom packaging, such as argon-flushed bags, to preserve stability during transit and storage.

is mk 677 a peptide VS Ordinary Low-Grade Peptides

To clarify the technical distinction and value proposition, the following comparison table contrasts high-purity MK-677 with low-grade peptide alternatives commonly found in the market.

Bulk Purchase Selection Guide

For B2B buyers, the procurement of MK-677 involves navigating several common pitfalls. This guide provides a structured approach to selecting a reliable supplier and ensuring product quality.

Common Pitfalls

• Misclassification: Some suppliers list MK-677 as a peptide, which can lead to regulatory issues. Always verify the molecular structure.
• Incomplete Documentation: Lack of a third-party CoA or MSDS is a red flag. Request these documents before purchase.
• Unstable Pricing: Extremely low prices often indicate low purity or adulteration. Compare prices against market averages.
• Poor Packaging: MK-677 is hygroscopic. Ensure the supplier uses vacuum-sealed, desiccated packaging.

Selection Standards

When evaluating suppliers, prioritize those who provide:

• HPLC and MS data for each batch.
• GMP or ISO 9001 certification.
• Transparent lead times and shipping conditions.
• Custom packaging options for bulk orders.

Buyer Checklist

• Confirm the compound’s CAS number (159634-47-0) and molecular weight.
• Request a sample for in-house testing before bulk commitment.
• Verify storage and handling instructions with the supplier.
• Check for any import restrictions in your country.

Core Product Advantages

Choosing a high-purity MK-677 supplier offers distinct advantages that directly impact laboratory outcomes and business efficiency.

Purity: Our MK-677 is consistently tested at ≥99% purity by HPLC, ensuring minimal interference in sensitive assays. This level of purity is critical for dose-response studies and formulation consistency.

Stability: With a 24-month shelf life under proper storage, our product reduces the risk of degradation-related batch failures. This stability translates to lower inventory turnover and cost savings for bulk buyers.

Cost Performance: While premium-grade MK-677 may have a higher upfront cost, the elimination of failed experiments and re-orders results in a lower total cost of ownership. Bulk pricing tiers offer additional savings for orders above 100 grams.

Technical Support: Our team provides detailed technical documentation, including solubility protocols and stability data, to assist labs in optimizing their workflows. This support is invaluable for researchers new to working with this compound.

Frequently Asked Questions

Q1: Is MK-677 a peptide or a small molecule?
MK-677 is a synthetic small molecule, not a peptide. It acts as a ghrelin receptor agonist and has a molecular weight of approximately 624.77 g/mol. This distinction is important for regulatory classification and handling protocols.

Q2: What purity level is recommended for research applications?
For most research applications, a purity of ≥98% is acceptable. However, for advanced studies or formulation work, ≥99% purity is recommended to minimize confounding variables and ensure reproducibility.

Q3: How should MK-677 be stored to maintain stability?
MK-677 should be stored at -20°C in a desiccated, light-protected container. Under these conditions, it remains stable for up to 24 months. Avoid repeated freeze-thaw cycles by aliquoting the powder into single-use vials.