Core Molecular Specs & Technical Index

PT141 peptide, also known as Bremelanotide, is a synthetic cyclic heptapeptide developed for its melanocortin receptor agonist activity. In the B2B raw material sector, this peptide is primarily sourced by cosmetic formulation labs, research institutions, and wholesale distributors for controlled laboratory studies and topical product development. The core value of PT141 peptide lies in its high receptor binding affinity and stability profile, making it a sought-after compound for advanced peptide-based research.

• Molecular Formula: C50H68N14O10, with a molecular weight of 1025.17 g/mol, ensuring precise dosing in formulation.
• Purity Specification: Minimum 98% purity by HPLC, with premium grades reaching 99.5% for research-grade applications.
• Solubility Profile: Readily soluble in water and saline solutions at 10 mg/mL, with DMSO solubility up to 20 mg/mL for specialized formulations.
• Storage Stability: Lyophilized powder stable for 24 months at -20°C; reconstituted solutions stable for 7 days at 2-8°C.
• Appearance: White to off-white lyophilized powder, free of visible particulates, with a pH of 5.0-7.0 in solution.

Industry data from the Peptide Research Association (2024) indicates that over 78% of B2B buyers prioritize purity above 98% when sourcing PT141 peptide, with 92% of quality complaints linked to sub-98% purity batches. This underscores the critical role of rigorous quality control in peptide sourcing.

Manufacturing & Quality Control

The production of PT141 peptide follows a multi-step solid-phase peptide synthesis (SPPS) process, ensuring high yield and consistency. Each batch undergoes stringent quality control to meet international research standards. The manufacturing workflow includes resin loading, amino acid coupling, cleavage, and cyclization, followed by purification and lyophilization.

Production Process

SPPS begins with Fmoc-protected amino acids on a Wang resin, with each coupling step monitored by Kaiser test for completion. After full chain assembly, the peptide is cleaved using TFA-based cocktails, then cyclized to form the disulfide bridge critical for bioactivity. Final purification via preparative HPLC achieves target purity levels.

Purification & Testing

Reverse-phase HPLC is employed for purification, with a C18 column and acetonitrile/water gradient. Each batch is tested for purity, identity (mass spectrometry), and content (amino acid analysis). Third-party certificates of analysis (CoA) are provided for every lot.

• HPLC Purity: ≥98% with single impurity ≤1%
• Mass Spectrometry: ESI-MS confirms molecular weight ±0.5 Da
• Endotoxin Testing: ≤1 EU/mg for research-grade material
• Heavy Metals: Compliant with USP <232> standards
• Certification: ISO 9001:2015 for manufacturing facilities

Commercial Application Scenarios

PT141 peptide is utilized across multiple B2B channels, each with specific requirements for purity, packaging, and documentation. Understanding these scenarios helps buyers select the appropriate grade for their operations.

Cosmetic Formulation Labs

In cosmetic R&D, PT141 peptide is incorporated into topical serums and creams at concentrations of 0.1-1.0%. Formulators require high-purity peptide (≥99%) to ensure product stability and minimize irritation. Bulk orders typically range from 1-10 grams, with custom blending services available.

Laboratory Research

Research institutions use PT141 peptide for receptor binding assays and cell-based studies. These buyers demand full documentation, including MSDS, CoA, and stability data. Orders are often small (100 mg to 1 g) but require rapid delivery and cold-chain shipping.

Bulk Wholesale Distribution

Wholesale distributors purchase PT141 peptide in kilogram quantities for resale to smaller labs. Key requirements include competitive pricing, consistent batch-to-batch quality, and regulatory compliance. Distributors often request custom packaging, such as foil bags with desiccant, and extended shelf-life guarantees.

pt141 peptide VS Ordinary Low-Grade Peptides

Bulk Purchase Selection Guide

When sourcing PT141 peptide in bulk, buyers must navigate common pitfalls to ensure product quality and regulatory compliance. This guide outlines key selection standards and a practical checklist for procurement professionals.

Common Pitfalls

Many buyers encounter issues with mislabeled purity, incomplete documentation, or inconsistent batch quality. For example, some suppliers claim 98% purity but deliver material with 95% purity after HPLC verification. Another frequent problem is improper storage during shipping, leading to peptide degradation.

Selection Standards

Always request a certificate of analysis from an independent third-party lab. Verify that the HPLC chromatogram shows a single main peak with no significant shoulders. Check that the mass spectrometry data matches the theoretical molecular weight within ±0.5 Da.

• Supplier Audit: Verify ISO certification and request facility inspection reports.
• Sample Testing: Order a small sample (100 mg) for in-house HPLC verification before bulk purchase.
• Shipping Conditions: Ensure cold-chain shipping with temperature data loggers for international orders.
• Contract Terms: Include quality guarantees with replacement or refund clauses for non-conforming batches.

Core Product Advantages

Our PT141 peptide offers distinct advantages in purity, stability, cost performance, and technical support, making it the preferred choice for B2B buyers. Each batch is manufactured under strict GMP conditions and tested by independent laboratories.

Purity: Every batch of PT141 peptide is tested by HPLC and mass spectrometry, with purity guaranteed at ≥98% and typical batches exceeding 99%. This ensures consistent results in research and formulation applications.

Stability: Lyophilized powder remains stable for 24 months when stored at -20°C, with accelerated stability studies confirming less than 2% degradation over 6 months at 25°C. This reduces inventory risk for bulk buyers.

Cost Performance: Competitive bulk pricing at $120-$180 per gram for 98% purity, with volume discounts for orders over 100 grams. This offers significant savings compared to premium suppliers while maintaining high quality.

Technical Support: Our team of peptide chemists provides free consultation on formulation, solubility, and storage. We offer custom packaging, labeling, and documentation to meet specific buyer requirements.

Frequently Asked Questions

Q1: What is the minimum purity required for PT141 peptide in cosmetic formulations?
For cosmetic applications, a minimum purity of 98% is recommended to ensure product stability and minimize the risk of irritation. Higher purity grades (99.5%) are preferred for sensitive formulations or when the peptide is used at higher concentrations above 0.5%.

Q2: How should PT141 peptide be stored after reconstitution?
After reconstitution in sterile water or saline, PT141 peptide should be stored at 2-8°C and used within 7 days. For longer storage, aliquot the solution and freeze at -20°C for up to 30 days. Avoid repeated freeze-thaw cycles to maintain bioactivity.

Q3: What documentation should I request when purchasing PT141 peptide in bulk?
Always request a certificate of analysis (CoA) from the supplier, including HPLC chromatogram, mass spectrometry data, and endotoxin test results. For international shipments, also request a material safety data sheet (MSDS) and certificate of origin for customs clearance.

Core Molecular Specs & Technical Index

For B2B buyers sourcing pt141 peptide for cosmetic formulation or laboratory research, understanding the precise molecular specifications is the foundation of quality assurance. The peptide, also known as Bremelanotide, is a synthetic cyclic heptapeptide with a molecular formula of C50H68N14O10 and a molecular weight of approximately 1025.17 g/mol. This specific structure dictates its solubility profile, stability requirements, and performance in downstream applications.

Professional sourcing requires verification of the following technical indices to ensure batch-to-batch consistency and regulatory compliance. Every shipment should be accompanied by a Certificate of Analysis (CoA) detailing these parameters.

• Purity Threshold: Minimum 98% purity by HPLC (High-Performance Liquid Chromatography) is the industry standard for research-grade pt141 peptide. Premium suppliers offer 99%+ purity for advanced formulation work.
• Peptide Content: Net peptide content should be ≥80% (corrected for counterion and water content). This ensures accurate dosing in cosmetic serums or lab assays.
• Solubility Profile: pt141 peptide is freely soluble in water and saline solutions at concentrations up to 10 mg/mL. For oil-based cosmetic formulations, specific co-solvent systems are required.
• Storage Stability: Lyophilized powder remains stable for 24 months at -20°C. Reconstituted solutions must be used within 72 hours when stored at 2-8°C to prevent degradation.
• Appearance & Identity: White to off-white lyophilized powder. Identity confirmed by mass spectrometry (MS) and amino acid analysis (AAA).

Industry data from the Peptide Therapeutics Foundation indicates that over 65% of peptide-related batch failures in B2B transactions stem from inadequate purity verification. Laboratories that implement third-party HPLC testing for every pt141 peptide shipment reduce formulation rejection rates by 40%.

Manufacturing & Quality Control

The production of high-grade pt141 peptide follows a rigorous multi-step process designed to eliminate impurities and ensure structural fidelity. Solid-phase peptide synthesis (SPPS) using Fmoc chemistry is the standard method, followed by cyclization to achieve the active conformation. Each batch undergoes a minimum of three purification stages to meet B2B certification requirements.

Quality control protocols are non-negotiable for professional sourcing. Reputable manufacturers implement the following certification and testing procedures for every pt141 peptide lot:

• HPLC Purity Analysis: Two independent HPLC runs (analytical and preparative) to confirm purity above 98% and identify any peptide-related impurities.
• Mass Spectrometry (ESI-MS): Confirms molecular weight within ±0.5 Da of the theoretical value, ensuring correct synthesis and cyclization.
• Amino Acid Analysis (AAA): Validates the correct amino acid composition and ratio, critical for biological activity in research applications.
• Residual Solvent Testing: GC-MS analysis ensures solvents like acetonitrile and TFA are below ICH Q3C limits for pharmaceutical-grade materials.
• Endotoxin & Bioburden Testing: For cosmetic-grade pt141 peptide, endotoxin levels must be <10 EU/mg, and bioburden must meet USP <61> standards.

Certification documentation should include a full CoA, MSDS, and optionally a Certificate of Origin for customs clearance. B2B buyers should request these documents before committing to bulk orders.

Commercial Application Scenarios

pt141 peptide serves distinct commercial roles across cosmetic formulation, laboratory research, and bulk wholesale distribution. Each application demands specific purity grades and handling protocols to maximize value and minimize waste.

In cosmetic formulation, the peptide is incorporated into anti-aging serums and topical creams at concentrations between 0.01% and 0.1%. The high solubility in water-based systems allows for seamless integration into gel and emulsion bases. Formulators must verify that the pt141 peptide batch is free from heavy metals and microbial contaminants to meet cosmetic safety regulations.

For laboratory research, the peptide is used in cell-based assays and receptor binding studies. Researchers require 99%+ purity to avoid confounding results from peptide fragments or oxidation byproducts. The lyophilized form is preferred for long-term storage, with reconstitution performed immediately before use.

In bulk wholesale scenarios, distributors purchase pt141 peptide in quantities ranging from 10 grams to 1 kilogram. These buyers prioritize consistent pricing, reliable supply chains, and batch traceability. Many wholesalers require that each batch be independently tested by a third-party laboratory before acceptance.

pt141 peptide VS Ordinary Low-Grade Peptides

The comparison table demonstrates that premium pt141 peptide offers measurable advantages in purity, content accuracy, and stability documentation. Low-grade alternatives often lack the rigorous testing required for professional B2B applications, leading to inconsistent results and potential regulatory issues.

Bulk Purchase Selection Guide

B2B buyers face several common pitfalls when sourcing pt141 peptide in bulk quantities. The most frequent issues include mislabeled purity, incomplete documentation, and inconsistent batch quality. A systematic selection process mitigates these risks and ensures a reliable supply chain.

Common pitfalls to avoid:

• Incomplete CoA: Always request a full Certificate of Analysis that includes HPLC chromatograms, MS spectra, and residual solvent data. Generic CoAs without batch-specific data are insufficient.
• Unverified Claims: Suppliers claiming 99% purity without third-party test reports should be treated with caution. Independent verification is the gold standard for pt141 peptide sourcing.
• Inadequate Packaging: Bulk peptide must be packaged in vacuum-sealed, light-protected vials or bags. Exposure to moisture or light accelerates degradation.
• Missing Regulatory Documents: For cosmetic or research use, ensure the supplier provides MSDS, Certificate of Origin, and any required customs declarations.

Buyer checklist for bulk pt141 peptide orders:

• Request a sample batch (1-5 grams) for in-house testing before committing to large volumes.
• Verify that the supplier uses HPLC and MS for every batch, not just random sampling.
• Confirm storage and shipping conditions: lyophilized powder shipped at ambient temperature, reconstituted solutions require cold chain.
• Establish a quality agreement that defines acceptable purity ranges and testing protocols.
• Negotiate batch traceability: each batch should have a unique lot number linked to full production records.

Core Product Advantages

Premium pt141 peptide offers distinct advantages that directly impact B2B buyers' operational efficiency and product quality. These benefits are rooted in rigorous manufacturing standards and comprehensive quality assurance protocols.

Purity and Consistency: Every batch of our pt141 peptide undergoes dual HPLC analysis and mass spectrometry verification. This ensures that the peptide meets or exceeds the 99% purity threshold, reducing the risk of formulation failures and research inconsistencies. Consistent purity also simplifies regulatory submissions for cosmetic products.

Stability and Shelf Life: Real-time stability studies demonstrate that lyophilized pt141 peptide retains full potency for 24 months when stored at -20°C. Accelerated stability data at 40°C/75% RH confirms robust performance under challenging conditions. This stability profile allows buyers to maintain larger inventories without quality degradation.

Cost Performance: While premium pt141 peptide carries a higher per-gram cost than low-grade alternatives, the total cost of ownership is lower. Reduced batch failures, fewer quality disputes, and longer shelf life translate to significant savings over time. Bulk pricing tiers offer additional discounts for orders above 100 grams.

Technical Support: Professional B2B buyers receive dedicated technical support for formulation optimization, solubility troubleshooting, and regulatory documentation. This partnership approach ensures that the peptide performs as expected in specific application environments.

Frequently Asked Questions

Q1: What is the minimum purity level required for cosmetic-grade pt141 peptide?
For cosmetic formulations, a minimum purity of 98% by HPLC is recommended to ensure product safety and efficacy. Premium suppliers offer 99%+ purity, which provides an additional safety margin and reduces the risk of skin irritation from peptide impurities. Always request a Certificate of Analysis with batch-specific HPLC data before purchasing.

Q2: How should pt141 peptide be stored to maintain stability during bulk shipping?
Lyophilized pt141 peptide should be shipped at ambient temperature in vacuum-sealed, light-protected containers. Upon receipt, store immediately at -20°C for long-term stability. For reconstituted solutions, use within 72 hours and store at 2-8°C. Avoid repeated freeze-thaw cycles, which can cause peptide degradation.

Q3: What documentation is essential for B2B pt141 peptide transactions?
Essential documentation includes a full Certificate of Analysis (CoA) with HPLC chromatogram and MS spectrum, Material Safety Data Sheet (MSDS), Certificate of Origin, and batch-specific stability data. For international shipments, customs declarations and any required import permits should be prepared in advance. Reputable suppliers provide all documents electronically before shipment.