Every Vendor Earns Their Spot
RUO Codes is not an open directory. Every vendor listed here has been evaluated against a documented third-party testing standard. This page explains exactly what that standard requires, how we score it, which labs we recognize, and how the directory is maintained over time.
A coupon code is worthless if you can't trust what's in the vial. The directory exists to solve that problem, not add to it.
The Three Core COA Requirements
To be listed on RUO Codes at all, a vendor must provide current Certificates of Analysis from an independent, recognized third-party testing facility that confirm all three of the following:
Net Content
The actual quantity of compound present in the vial must be documented in mass units (mg). Vial-level measurements from multiple units are required — a single bulk number is not sufficient.
Net Purity (HPLC)
Purity percentage of the active compound must be confirmed by chromatographic analysis (HPLC-UV or equivalent). We look for documented values, not simply a label claim.
Compound Identity (MS)
The compound's identity must be confirmed analytically — typically by mass spectrometry (LC-MS) or equivalent technique. This confirms that the compound in the vial is actually what the label states.
COAs must be current and publicly accessible. A vendor that references testing in marketing copy but cannot point to actual lab documentation does not meet the minimum bar. Lot-specific documentation is required — marketing claims do not count.
Third-Party Testing Score
Once a vendor meets the baseline requirement, we score testing documentation across seven core categories. Fentanyl/adulterant screening is tracked separately as a bonus indicator. The score is displayed as a badge on every vendor card and detail page so researchers can immediately see how well-documented a vendor's products are before purchasing.
Example badges
Vendor meets the minimum listing requirement — net content, purity, and identity all documented. Listed on the directory but no extra-credit testing on record.
Vendor has documented at least one or two extra-credit tests beyond the baseline — typically endotoxins or conformity. Above average for the space.
Vendor has documented the majority of available test categories. Indicates a serious investment in safety and transparency documentation.
What Each Test Category Means
The three baseline categories are required for listing. The additional core categories and bonus screening are explained below.
Baseline (required): Net Content · Net Purity (HPLC) · Compound Identity (MS)
All three must appear in current, lot-specific COA documentation from a recognized independent lab. Absence of any one disqualifies a vendor from listing entirely.
Endotoxin Testing
Extra creditBacterial endotoxin testing (LAL, BET, or recombinant Factor C) confirms the compound is free of pyrogens — gram-negative bacterial toxins that survive sterilization and cause inflammatory responses.
Sterility / Bioburden
Extra creditMicrobial testing (USP 61, USP 71, PCR-based, or bioburden count) confirms absence of viable microorganisms. This is especially critical for injectable research compounds.
Heavy Metal Screening
Extra creditICP-MS or equivalent elemental impurity analysis screens for lead, arsenic, mercury, cadmium, and other toxic metals that can accumulate from synthesis reagents or container leaching.
Fentanyl / Adulterant Screening
Bonus indicatorExplicit documentation that the compound has been screened for fentanyl and other controlled-substance adulterants. This earns a bonus indicator beyond the seven-point score and signals an emerging gold standard for vendors prioritizing researcher safety.
Conformity / Batch Consistency
Extra creditIndividual vial-level results reported separately across multiple units in the batch. This demonstrates that the entire lot — not just a single representative sample — meets specification.
Leading Independent Testing Laboratories
This list reflects independent testing facilities observed in COAs reviewed to date. It is not exhaustive; COAs from other accredited independent laboratories are reviewed case by case.
Chromate
Chromatographic & mass analysis
MZ Biolabs
Purity, identity, conformity
BioRegen
Identity, sterility, purity
Ethos Analytics
Identity, purity, elemental
AFI
Analytical testing, identity
This list reflects labs observed in COAs reviewed to date. It is not exhaustive — COAs from other accredited independent testing facilities are reviewed on a case-by-case basis.
The Removal Standard
Being listed on RUO Codes is not permanent. Vendors that fail to maintain the minimum standard after listing are removed from the directory.
Grounds for Removal
- COA documentation becomes unavailable, outdated, or cannot be verified as current
- Documentation fails to meet the three-part baseline upon review or re-review
- COAs are determined to be fabricated, manipulated, or not from an independent lab
- Credible community-sourced evidence of systematic quality failures not reflected in available documentation
What Removal Means
Vendors that are removed are taken down from the directory entirely — they do not appear in search results, vendor listings, or compound sourcing pages. Removal decisions are applied consistently regardless of vendor size, affiliate relationship, or community popularity.
The removal history is real and it has been applied. That history is what makes the directory credible — a list with no removal mechanism is just an advertisement.
See the Standard Applied
Every vendor in the directory has been evaluated against this framework. Browse the vendor directory to see testing scores, badge breakdowns, and recognized labs for each supplier.