VIP Vasoactive Intestinal Peptide Sourcing Guide Purity Specifications Manufacturing Certifications

Core Molecular Specs & Technical Index

VIP (Vasoactive Intestinal Peptide) is a 28-amino-acid neuropeptide belonging to the secretin/glucagon superfamily. For B2B buyers—including cosmetic formulation chemists, peptide research laboratories, and bulk raw material wholesalers—understanding its precise molecular specifications is the first step toward reliable sourcing. The core value of high-grade VIP lies in its sequence fidelity, purity level, and solubility profile, which directly impact downstream application consistency.

Basic Physicochemical Properties

VIP has a molecular weight of approximately 3325 Da and an isoelectric point (pI) around 10.0. It is a basic, amphiphilic peptide that exhibits high affinity for VPAC1 and VPAC2 receptors. The peptide is supplied as a lyophilized white powder, typically in the form of a trifluoroacetate (TFA) salt. Reconstitution in sterile water or phosphate-buffered saline (PBS) yields a clear, colorless solution at recommended concentrations.

Purity & Analytical Specifications

For cosmetic and research-grade applications, the minimum acceptable purity is 98% as determined by HPLC (High-Performance Liquid Chromatography). Premium-grade material often exceeds 99%. Key analytical parameters include:

• HPLC Purity: ≥98% (single peak area normalization)
• Peptide Content: ≥80% (by nitrogen determination)
• Mass Spectrometry (MS): Confirmed molecular weight ±1 Da
• Amino Acid Analysis: Composition within 10% of theoretical values
• Residual TFA: ≤5% (by ion chromatography)
• Endotoxin Level: ≤1.0 EU/mg (for research use)
• Water Content: ≤5% (by Karl Fischer titration)

Solubility & Reconstitution Guidelines

VIP is freely soluble in water at concentrations up to 10 mg/mL. For long-term storage, it is recommended to dissolve the peptide in sterile water at 1 mg/mL and aliquot into single-use vials. Avoid repeated freeze-thaw cycles. The reconstituted solution should be stored at -20°C and used within 30 days. For cosmetic formulations, VIP can be directly incorporated into aqueous phases at pH 5.0–7.0.

Storage & Stability Data

Lyophilized VIP is stable for 24 months when stored at -20°C in a desiccated, light-protected environment. Once reconstituted, the peptide retains >95% purity for 7 days at 4°C and for 30 days at -20°C. Accelerated stability studies (40°C/75% RH for 4 weeks) show less than 2% degradation, confirming robust shelf-life under recommended conditions.

Industry data from the Peptide Therapeutics Foundation indicates that over 85% of peptide-related quality failures in cosmetic raw materials stem from improper storage or sub-98% purity. Sourcing VIP with certified HPLC and MS documentation reduces formulation risk by up to 40%.

Manufacturing & Quality Control

Reliable VIP production follows a tightly controlled, GMP-compliant process. From solid-phase peptide synthesis (SPPS) to final lyophilization, each step must be validated to ensure batch-to-batch consistency. Below is the standard manufacturing workflow and associated certifications.

Production Process Overview

The synthesis begins with Fmoc-based SPPS on a Rink amide resin, using HBTU/HOBt activation. After chain assembly, the peptide is cleaved from the resin using TFA/TIS/water (95:2.5:2.5) and precipitated in cold diethyl ether. Crude peptide is then purified via preparative HPLC using a C18 column with a water/acetonitrile gradient (0.1% TFA). The final product is lyophilized and packaged under inert argon gas.

Purification & Analytical Methods

Two-stage purification is standard: first, reverse-phase HPLC removes truncated sequences and deletion peptides; second, ion-exchange chromatography eliminates residual TFA and counterions. Each batch undergoes rigorous QC testing:

• Analytical HPLC: Purity verification with UV detection at 214 nm and 280 nm
• ESI-MS or MALDI-TOF: Molecular weight confirmation
• Amino Acid Analysis: Compositional integrity check
• Residual Solvents: GC headspace analysis for acetonitrile and TFA
• Bioburden Testing: Microbial limits per USP <61>

Third-Party Testing & Certifications

Reputable suppliers provide a Certificate of Analysis (CoA) for each batch, including HPLC chromatogram, MS spectrum, and water content data. Optional third-party testing from ISO 17025 accredited labs adds an extra layer of assurance. Key certifications to request include:

• GMP Certificate (for pharmaceutical-grade production)
• ISO 9001:2015 (quality management system)
• MSDS (Material Safety Data Sheet)
• Stability Report (accelerated and real-time data)
• Heavy Metal Analysis (ICP-MS for Pb, As, Cd, Hg)

Commercial Application Scenarios

VIP serves diverse B2B markets, from high-end cosmetic formulations to advanced laboratory research. Understanding these applications helps buyers select the appropriate grade and quantity.

Cosmetic Formulation

In anti-aging skincare, VIP is incorporated into serums and creams at concentrations of 0.1–1.0%. Its primary function is to support collagen synthesis and improve microcirculation. Formulators prefer ≥99% purity to avoid skin irritation from peptide impurities. VIP is often combined with copper peptides or hyaluronic acid for synergistic effects. Bulk orders typically range from 1 gram to 100 grams per batch.

Laboratory Research

Research institutions use VIP for receptor binding assays, cell signaling studies, and neuroprotection experiments. For these applications, endotoxin-free (≤0.1 EU/mg) and sterile-filtered material is mandatory. Small quantities (5–50 mg) are common, with a focus on batch-to-batch reproducibility. Many labs require a detailed CoA and MS data for publication purposes.

Bulk Wholesale & Distribution

Wholesale buyers—such as peptide distributors and contract manufacturers—purchase VIP in kilogram quantities. They prioritize competitive pricing without compromising purity. Long-term supply agreements often include custom packaging (e.g., 10 g, 50 g, 100 g per vial) and expedited shipping. Quality audits and on-site inspections are standard for large-volume contracts.

vip vasoactive intestinal peptide VS Ordinary Low-Grade Peptides

Bulk Purchase Selection Guide

Navigating the VIP market requires attention to several critical factors. Below are common pitfalls and a buyer checklist to ensure a successful procurement.

Common Pitfalls to Avoid

• Incomplete Documentation: Suppliers who cannot provide a full CoA with HPLC and MS data may be selling impure or misidentified material.
• Unrealistic Pricing: Extremely low prices often indicate low purity or adulteration. Quality VIP synthesis is cost-intensive.
• Poor Storage Conditions: Peptides shipped without cold packs or desiccant degrade quickly. Always verify shipping protocols.
• Lack of Third-Party Testing: Relying solely on in-house QC increases risk. Request independent lab reports for critical batches.

Selection Standards for Buyers

When evaluating suppliers, prioritize those with GMP certification and a proven track record in peptide synthesis. Request a sample for in-house testing before placing a large order. Verify that the supplier can provide custom packaging and flexible lead times. For cosmetic applications, ensure the peptide is free of heavy metals and residual solvents.

Buyer Checklist

• Request CoA for the specific batch number
• Confirm HPLC purity ≥98% (preferably ≥99%)
• Verify MS molecular weight match
• Check endotoxin and bioburden levels
• Inspect storage and shipping conditions
• Ask for stability data (accelerated and real-time)
• Review supplier certifications (GMP, ISO)
• Obtain a sample for in-house validation

Core Product Advantages

Our VIP Vasoactive Intestinal Peptide stands out in the market due to four key differentiators: purity, stability, cost performance, and technical support.

Uncompromising Purity

Every batch is synthesized and purified to ≥99% HPLC purity, verified by both in-house and third-party labs. This ensures minimal batch-to-batch variation and maximum efficacy in your formulations or experiments.

Exceptional Stability

Our lyophilization process and argon packaging extend shelf life to 24 months at -20°C. Accelerated stability studies confirm less than 1% degradation after 4 weeks at 40°C, giving you confidence in long-term storage.

Cost-Effective Pricing

By optimizing our SPPS workflow and scaling production, we offer competitive bulk pricing without sacrificing quality. Volume discounts are available for orders above 10 grams, making high-purity VIP accessible for both research and commercial use.

Dedicated Technical Support

Our team of peptide chemists and application specialists provides free consultation on reconstitution, formulation, and storage. We also offer custom packaging and expedited shipping for urgent orders. Your satisfaction is backed by a 100% quality guarantee.

Frequently Asked Questions

Q1: What is the minimum order quantity (MOQ) for VIP Vasoactive Intestinal Peptide?
Our standard MOQ is 1 gram for research-grade material and 10 grams for cosmetic-grade. For bulk wholesale orders, we can accommodate quantities from 100 grams to several kilograms. Please contact our sales team for custom requirements.

Q2: How do I verify the purity of VIP before purchasing in bulk?
We provide a free sample (up to 10 mg) for in-house testing. The sample comes with a full CoA including HPLC chromatogram and MS spectrum. You can also request third-party testing from an ISO 17025 accredited lab at an additional cost.

Q3: Can VIP be used in water-based cosmetic formulations without stabilizers?
Yes, VIP is soluble in water up to 10 mg/mL and remains stable in aqueous solutions at pH 5.0–7.0 for up to 7 days at 4°C. For longer shelf life in finished products, we recommend using antioxidants (e.g., 0.1% BHT) and storing at 2–8°C. Our technical team can provide formulation guidance upon request.