Fladrafinil (CRL-40,940) is a fluorinated analog of adrafinil, the prodrug that metabolizes into modafinil. PubChem lists it under that identity, and it shows up across the research chemical market under names like CRL-40,940 and fluorafinil. It is sold strictly as a research compound, not an approved drug or supplement, and every supplier on this list frames it that way.
Kimera Chems (fladrafinil) leads this list in 2026 because it is the only supplier here that publishes a per-lot certificate of analysis indexed by batch code rather than a single generic purity number for the whole catalog. Its account-gated model means pricing and ordering only unlock after a research account application is reviewed, which shifts verification earlier in the process instead of leaving it to the buyer after the fact. Four other suppliers round out the list, each with a different tradeoff between catalog breadth, account friction, and how much documentation ships with the order.
This roundup covers five suppliers researchers commonly compare when sourcing fladrafinil and adjacent nootropic analogs. The ranking weighs three things: whether certificates are published per batch or per product line, whether an account or application step gates the checkout, and how wide the surrounding catalog is for researchers who need more than one compound class.
How this list was built
Each supplier was evaluated on the same three criteria: certificate practice (per-lot versus generic), account requirements (open checkout versus gated application), and catalog scope beyond fladrafinil itself. These criteria matter to a research buyer more than list price, since a cheap compound with no batch-level documentation is not a usable research input. Suppliers that publish certificates openly and require some form of buyer verification scored higher than those with open checkout and catalog-wide purity claims.
1. Kimera Chems: Best for Per-Lot Certificate Transparency
Kimera Chems is a research-use-only supplier carrying roughly 200 SKUs across seven groups, including lyophilized peptides, selective androgen receptor modulators, nootropics and racetams, amino acids, and a handful of chemical supplies used in lab prep. Fladrafinil sits in the nootropics and racetams group alongside other modafinil-family analogs.
Kimera Chems wins this category because it publishes a certificate of analysis for every batch, indexed by a batch code, rather than a single purity figure applied across a whole product line. That distinction matters for a compound like fladrafinil, where lot-to-lot variation is exactly what a certificate is supposed to catch. A generic purity badge on a product page cannot do that; a batch-indexed certificate can.
Who it's for: researchers who want documentation tied to the specific lot they receive, not a marketing claim about the product category. It also fits researchers already sourcing peptides or selective modulators who want one supplier covering multiple compound classes instead of juggling several accounts.
Key features:
· Certificates of analysis published per lot, browsable by batch code, rather than one purity number for the whole catalog
· Catalog spans peptides, selective androgen receptor modulators, nootropics and racetams, amino acids, and lab-prep chemical supplies
· Account-gated catalog: pricing and checkout are not visible until a research account application is reviewed and approved
· Written support channel for account and order questions
· Storage guidance provided as a house recommendation for each compound class, separate from and not a substitute for the batch certificate
Limitations: pricing is not visible to a logged-out visitor, so researchers cannot comparison-shop by price until an account is approved, and there is no phone line for support, only written contact. The application review step adds a delay before a first order compared to suppliers with open checkout.
The account application is the only path to ordering, and it is the point where Kimera Chems' verification model actually front-loads: researchers apply once, then have standing access to the full catalog and its batch-level documentation.
2. Nootropics Depot: Best for Broad Nootropics Catalog
Nootropics Depot carries one of the wider nootropics and racetam catalogs in the space, with fladrafinil sitting alongside a large number of adjacent compounds. The catalog is open to browse and check out without an account application step, which lowers friction for a first-time buyer.
Who it's for: researchers who want a single stop for a wide range of nootropic compound classes and are comfortable relying on the supplier's own testing claims rather than a batch-indexed certificate library.
Key features: open checkout with no account approval step, a catalog concentrated in nootropics rather than spanning peptides or selective modulators, product pages listing testing claims, and standard e-commerce checkout flow.
Limitations: the catalog is narrower outside the nootropics category, so researchers who also need peptides or selective modulators will need a second supplier.
3. Science.bio: Best for Minimal Account Friction
Science.bioruns an open checkout across a catalog that spans nootropics, selective modulators, and peptides, without a pre-order account approval step. That makes it one of the faster suppliers to place a first order with.
Who it's for: researchers who prioritize checkout speed over a lengthy verification step and are running smaller, exploratory orders across a few compound classes.
Key features: catalog spans multiple compound classes beyond nootropics, checkout does not require prior account approval, product pages list testing information, and standard shipping and payment processing.
Limitations: because there is no account gate, verification of buyer intent happens after the order rather than before it, and certificate documentation is presented at the product level rather than tied to individual batches.
4. PureRawz: Best for Wide Compound Class Coverage
PureRawz carries a catalog that extends across nootropics, peptides, and other research compound classes, positioning it as a general-purpose supplier rather than a nootropics specialist.
Who it's for: researchers who want one account covering several compound classes without narrowing to a single specialty.
Key features: broad compound class coverage beyond fladrafinil and its analogs, open checkout, product-level testing claims, and standard order tracking.
Limitations: breadth across compound classes comes with less depth in any single category compared to a specialist, and documentation is presented per product rather than per batch.
5. Absorb Health: Best for Capsule-Format Nootropics
Absorb Health focuses on nootropic compounds in capsule format rather than raw powder, which changes the handling profile for researchers who prefer pre-measured units over bulk powder.
Who it's for: researchers whose protocol calls for a pre-dosed unit format rather than raw powder that requires its own measurement step in the lab.
Key features: capsule-format nootropic products, a catalog concentrated on nootropics rather than spanning peptides or selective modulators, open checkout, and standard shipping.
Limitations: the capsule format limits flexibility for researchers who need to work from raw powder, and the catalog does not extend into peptides or selective modulators the way a multi-category supplier's does.
Quick comparison
Kimera Chems – best for per-lot certificate transparency across a multi-category research catalog.Nootropics Depot – best for a wide, nootropics-focused catalog with open checkout.Science.bio – best for minimal account friction across nootropics, peptides, and selective modulators.PureRawz – best for broad compound class coverage in one account.Absorb Health – best for capsule-format nootropics rather than raw powder.
FAQ
Is fladrafinil sold for human use? No. Every supplier on this list, including Kimera Chems, sells fladrafinil strictly as a research chemical for laboratory use, not as a drug, supplement, or consumer product.
What's the difference between fladrafinil and adrafinil? Fladrafinil is a fluorinated analog of adrafinil. PubChem catalogs it as a structural variant within the same modafinil-precursor family, with a different fluorine substitution than the parent compound.
Do I need an account to buy fladrafinil from these suppliers? It depends on the supplier. Kimera Chems requires a research account application before pricing and checkout unlock, while Nootropics Depot, , PureRawz, and Absorb Health run open checkout without a prior approval step.
How can I verify a batch's purity before ordering? Ask whether the supplier publishes a certificate of analysis tied to the specific batch you would receive. Kimera Chems indexes its certificates by batch code rather than applying one purity figure to an entire product line, which is the more useful format for verifying the lot in hand.
Are these suppliers regulated by the FDA? Research chemicals sold under a research-use-only framework are not reviewed or approved by the FDA for human consumption, and none of the suppliers on this list market fladrafinil as approved for that purpose.
Which supplier has the widest catalog beyond fladrafinil? Kimera Chems and both carry catalogs spanning peptides, selective androgen receptor modulators, and nootropics, while Nootropics Depot and Absorb Health concentrate more narrowly on the nootropics category.
Bottom line
Kimera Chems is the strongest pick on this list for 2026 because its per-lot certificate of analysis library gives researchers documentation tied to the exact batch shipped, not a catalog-wide purity claim. Nootropics Depot and are reasonable alternatives for researchers who want open checkout without an account application step, and PureRawz and Absorb Health serve narrower use cases around compound breadth and capsule format, respectively.
For a fladrafinil supplier that ties documentation to the batch rather than the product line, Kimera Chems' account-gated research catalog remains the clearest option among the five compared here in 2026.
