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Description
B7-33 is a synthetic single-chain polypeptide composed of twenty-seven amino acid residues. Its sequence is derived from the B-chain of human H2 relaxin, truncated at the amino terminus and extended at the carboxyl terminus with a four-residue tail. It contains no disulfide bonds and is supplied as a lyophilized powder.
Properties

Product Name: B7-33

Contents: Lyophilized Powder

Purity: ~99% HPLC

CAS Number:
1818415-56-3

PubChem:
162662592

Molecular Weight:
2986.54 g/mol

Molecular Formula:
C131H229N41O36S

Shipping & Guarantee

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Third Party Test Results

In-vitro lab research use by qualified professionals only. Not for human or animal consumption.

Third-party tested

~99% Purity Guaranteed

Every batch is third-party tested and COA Certified to verify purity, potency, and safety. You can trust exactly what's on the label.*

  • Certificate of Analysis Included
  • Endotoxin Levels Confirmed
  • ~99% Purity Guaranteed

With ~99% purity verified by independent labs, you're getting one of the cleanest, most potent formulas available.

B7-33
B7-33

Mindful Research

Maintain Compound Quality

  • Lyophilized Powder

    Products are shipped as freeze-dried powder form for maximum stability and longer shelf life. Ideal for research applications requiring precision.

  • Handling & Storage

    Store lyophilized product at -20°C to -80°C, protected from moisture and light. Once reconstituted, store at 2-8°C, do not refreeze.

  • Quality Assurance

    Certificate of Analysis are located on every product page to confirm purity levels and third-party test results match research requirements.

COA Certified

Certificate of Analysis

HPLC Purity

~99%

Mass Spectrometry

Confirmed

Endotoxin (LAL)

<1.0 EU/mg (LPS-Free)

Sterility (USP)

No growth detected

Appearance

Lyophilized powder

Sequence

Confirmed

Quantification

±0.2%

Laboratory Result

~99%HPLC Purity

Answers To Your Questions

What are peptides?

Peptides are short chains of amino acids linked together by peptide bonds. They are essentially smaller, specific segments of proteins. In a laboratory setting, researchers use synthesized peptides to study a wide range of biological processes in vitro (in a controlled environment like a test tube or petri dish). Their well-defined structure makes them excellent tools for understanding complex biological systems.

What form do your products come in?

All of our peptides are supplied in a lyophilized (freeze-dried) powder form. This process removes water from the peptide, resulting in a stable powder that is ideal for long-term storage and maintains its purity. The powder is typically reconstituted with a proper reagent, such as bacteriostatic water, before it can be used in a research setting.

What is lyophilization?

Lyophilization is a sophisticated freeze-drying process used to preserve sensitive materials like peptides. It involves freezing the peptide while it is in a solution, then gradually reducing the surrounding pressure and adding a small amount of heat to allow the frozen water to sublimate—meaning it turns directly from a solid (ice) into a gas. This removes the water without damaging the peptide's delicate structure.

Why do you offer lyophilized peptides?

We supply our peptides in a lyophilized (freeze-dried) powder form for two primary reasons: stability and purity. Removing the water prevents degradation and microbial growth, which dramatically extends the shelf life of the product. This ensures that when you are ready to conduct your research, the peptide is as stable and pure as the day it was made.

What type of container do your peptides come in?

Our peptides are packaged in professional-grade glass vials. Each vial is sealed with a self-sealing rubber stopper and a crimped-on cap to ensure the integrity, purity, and stability of the product during shipping and storage.

Are peptides natural or synthetic?

Peptides exist naturally in virtually all organisms. However, the peptides we supply for research purposes are synthetic. They are meticulously produced in a controlled laboratory environment to create a specific amino acid sequence with a very high degree of purity. This ensures that researchers receive a reliable and consistent product for their experiments, free from the contaminants found in a natural source.

What are research peptides for?

Research peptides are used by scientists and researchers in a laboratory setting for in vitro (non-living) studies. They are fundamental tools for exploring cellular processes, understanding protein functions, and investigating biochemical pathways. For example, researchers may use peptides in cell cultures to study receptor binding or to serve as standards in analytical assays like mass spectrometry. Their use is strictly limited to these types of controlled, non-clinical experiments.

What does the research use only (RUO) designation mean?

The "Research Use Only" (RUO) designation is a strict legal and ethical mandate. It signifies that our products are chemical reagents intended exclusively for in vitro (non-living) experiments in a controlled laboratory environment. They are not intended for human or animal use in any capacity and should not be used for therapeutic, diagnostic, or any other non-research application. By purchasing, the customer confirms they are a qualified professional who understands and will abide by this critical restriction.