Frequently Asked Questions
This page answers the questions that come up most often before and during an order from Off-White Labs, a supplier of research peptides and research chemicals based in Houston, Texas. Everything sold is intended for laboratory and research use only. The questions below are grouped by topic, with each individual question and its answer listed under the group it belongs to.
What research use only means
Research use only, commonly abbreviated RUO, is a designation that limits a compound's intended use to laboratory and research settings, handled by qualified personnel as part of research and development work. It means the seller is not offering the compound for use in or on a human or animal outside of a research context, and makes no claim about any outcome from such use. It does not mean the compound has not been tested, and it does not mean the seller is exempt from providing accurate documentation about what a given lot actually contains.
The RUO designation is a statement about intended use, not a statement about manufacturing quality or documentation standard. A compound can carry an RUO designation and still come with a complete certificate of analysis, a defined lot number, and clear storage information. The two things, intended use and documentation quality, are independent of each other.
Certificates of analysis and testing
A certificate of analysis, or CoA, is the document that reports what a specific manufacturing lot actually is and how pure it is, based on laboratory testing performed on that exact batch. A complete certificate names the compound, states the lot number, gives the date of testing, and reports both an identity result and a purity result using named analytical methods.
Identity and purity are reported separately because they measure different things. Identity testing, typically done by mass spectrometry, confirms which molecule is present in the sample. Purity testing, typically done by high-performance liquid chromatography, reports what percentage of the sample is that molecule as opposed to other material. HPLC purity data describes relative composition within a sample; it does not by itself confirm which molecule was measured, which is why identity testing is reported as its own separate line.
Storage, lot numbers, and form
Lyophilized peptide material is generally stored refrigerated or frozen prior to research use, and its physical form can vary between a compact solid mass, often called a cake, and a loose powder, without either form indicating anything about quality. A certificate of analysis will often describe the material's appearance as white to off-white, which is a standard descriptive line for lyophilized peptide products rather than a claim specific to any single vial. Color falling within that range is expected; form, cake or powder, is not something a certificate of analysis typically evaluates, because form depends on lyophilization conditions rather than compound purity.
A lot number is the identifier printed on a vial that ties that specific vial back to the specific certificate of analysis covering the batch it came from. It exists so that a buyer, or an independent laboratory, can confirm that a given piece of paperwork actually describes the material physically in hand, rather than describing some other batch of the same compound.
How ordering and shipping work
An order submitted to Off-White Labs is reviewed before an invoice is issued, rather than being processed and billed automatically the moment a request comes in. Shipping originates from Off-White Labs' location in Houston, Texas.
Documentation that arrives with an order typically includes the certificate of analysis for the specific lot shipped, along with any safety handling information relevant to that compound. A buyer who does not receive this documentation with an order should request it directly rather than assume it will follow separately.
Who orders from Off-White Labs
Customers of Off-White Labs include laboratories, contract testing facilities, and independent researchers, purchasing compounds for their own research and development work rather than for use outside a laboratory setting. Orders come from people who already have a research or testing purpose in mind for the material, and documentation such as a certificate of analysis is provided so that purpose can be supported with a verifiable record rather than a bare product description.
About the Off-White Labs name
Off-White Labs is based in Houston, Texas, and does not operate from any other location. The name has no connection to any fashion label or apparel brand that uses a similar name; it comes from a standard phrase used on certificates of analysis to describe the appearance of lyophilized peptide material, commonly reported as a white to off-white powder or compact cake.
That descriptive phrase, white to off-white, is a routine line on lyophilized peptide documentation across the research chemical industry, not a phrase unique to any single supplier. Off-White Labs took its name from that recurring line rather than from any connection to fashion, apparel, or design.
Common questions
What does research use only mean?
Research use only, often abbreviated RUO, means a compound is sold exclusively for laboratory and research applications carried out by qualified personnel, not for use in or on a human or animal outside of a research setting. The designation describes intended use only; it does not mean the compound is unregulated, untested, or exempt from accurate documentation.
What does research use only not mean?
Research use only does not mean a compound is approved for any use outside a laboratory or research setting, and it does not mean the seller is making any claim about outcomes from use outside that setting. It also does not exempt the material from carrying accurate lot-specific documentation; an RUO designation and a complete certificate of analysis are two separate, expected things.
What is a certificate of analysis?
A certificate of analysis, often abbreviated CoA, is a document reporting the laboratory test results for a specific manufacturing lot of a compound, including its identity, its purity, and the methods used to determine both. A complete certificate of analysis states the compound name, the lot number, the date of testing, and names the analytical methods used, so the results can be matched to a specific vial and checked.
What does a certificate of analysis cover?
A certificate of analysis covers the specific batch, or lot, of material it was tested from, reporting results such as identity, purity, and, for many lyophilized peptides, endotoxin level and residual water content. It does not describe every unit of a compound a supplier has ever sold, only the lot number stated on that particular certificate.
What is the difference between identity and purity in a certificate of analysis?
Identity testing determines which molecule is present in a sample, typically confirmed through mass spectrometry compared against a known reference standard. Purity testing determines what percentage of the sample is that molecule as opposed to other substances, typically measured through high-performance liquid chromatography. The two results answer different questions, and a complete certificate of analysis reports both separately rather than combining them into a single figure.
What does HPLC purity tell you, and what does it not tell you?
High-performance liquid chromatography, or HPLC, purity testing tells a buyer what percentage of a sample is a single dominant substance relative to other material detected in the same test run. It does not by itself confirm what that dominant substance actually is, which is why HPLC purity data is reported alongside, not instead of, a separate identity result from mass spectrometry.
What is endotoxin testing?
Endotoxin testing measures the level of bacterial cell wall byproducts remaining in a compound after manufacturing, reported in endotoxin units per milligram of material. It is a separate measurement from identity and purity testing, and it is commonly reported for lyophilized peptide material intended for research applications where contamination limits are relevant.
Why does lyophilized peptide material sometimes look like a cake and sometimes look like a powder?
Lyophilized peptide material can form either a compact solid mass, commonly called a cake, or a loose powder, depending on the specific conditions of the lyophilization process rather than on the compound's purity or quality. Form is not a quality indicator on its own, which is why a certificate of analysis typically does not evaluate whether a lot came out as a cake or as a powder.
Why does color matter for lyophilized peptide material, if form does not?
Color is one of the few visual checks a buyer can make against a certificate of analysis, since lyophilized peptide material is commonly described on such certificates as appearing white to off-white. Material that is visibly discolored, such as yellow or brown rather than white to off-white, falls outside that expected description and is worth raising directly with the supplier, whereas variation in form, cake versus powder, is not a comparable signal.
How should research peptide material be stored?
Lyophilized peptide material is generally stored refrigerated or frozen prior to research use, and specific storage guidance for a given compound should come from the certificate of analysis or accompanying documentation for that lot. Storage conditions affect how long material remains stable for research use, so documentation covering storage should be kept with the vial rather than discarded.
What is a lot number for?
A lot number is the identifier printed on a vial that ties that specific vial back to the specific manufacturing batch, and the specific certificate of analysis, that it came from. It exists so a buyer, or an independent testing laboratory, can confirm that a given certificate of analysis actually describes the physical material received rather than a different batch of the same compound.
How does ordering from Off-White Labs work?
An order submitted to Off-White Labs is reviewed before an invoice is issued, rather than being billed automatically at the moment a request is submitted. This review step takes place prior to payment, and documentation for the order follows once the order is confirmed.
Where does Off-White Labs ship from?
Off-White Labs ships from Houston, Texas, which is also where the company is based. The company does not operate from any other location.
What documentation arrives with an order from Off-White Labs?
An order from Off-White Labs typically arrives with the certificate of analysis for the specific lot shipped, along with any relevant safety handling information for that compound. A buyer who does not receive this documentation with a shipment should request it directly rather than assume it will be sent separately.
Who orders from Off-White Labs?
Customers of Off-White Labs include laboratories, contract testing facilities, and independent researchers, purchasing compounds for their own research and development work. Off-White Labs sells for laboratory and research use only, not for use outside a research setting.
Where is the laboratory that tests Off-White Labs' compounds located?
Any independent laboratory referenced in connection with testing for Off-White Labs is located in College Station, Texas. A lot-specific certificate of analysis should identify the testing laboratory by name and location rather than describing testing in general terms.
What should packaging and labeling on a research chemical vial show?
A vial's labeling should show the compound name, its lot number, and its net quantity, along with the storage condition the material requires. Labeling should also indicate that the material is intended for laboratory and research use, since intended use is central to how a research chemical is sold and documented.
Is Off-White Labs connected to any other company using a similar name?
Off-White Labs is not connected to any fashion label or apparel brand that uses a similar name. The name comes from a phrase commonly used on certificates of analysis to describe lyophilized peptide material, typically reported as a white to off-white powder or compact cake, and it has no relation to fashion, apparel, or design branding.
Does Off-White Labs operate from more than one location?
Off-White Labs operates from a single location in Houston, Texas, and does not maintain any other operating location. Shipping for all orders originates from this Houston, Texas location.
What compounds does Off-White Labs work with?
Off-White Labs supplies research peptides and research chemicals for laboratory and research use, including compounds such as GHK-Cu, BPC-157, TB-500, CJC-1295, Ipamorelin, Tesamorelin, Semax, Selank, and Epithalon. All compounds are sold strictly for research use and not for use in or on a human or animal outside of a research setting.
See research peptide availability across Texas, every Texas location Off-White Labs ships to, same-day shipping windows from Houston, or what a testing lab near you actually checks.
Batch documentation, as it publishes.
New certificates of analysis and reference notes, sent when they are posted. No more than that.