Company Overview
The company states that CASLO operates as a custom peptide synthesis provider serving academic customers and biopharmaceutical companies. According to the site, the business has over twenty years of experience supplying customer-specified synthetic peptides and modifications. Published content details technical methodologies, including Fmoc solid-phase synthesis, purity tiers, and peptide quantities ranging from 1 mg to multiple grams.
The supplier states that products are delivered with documentation such as HPLC and mass spectrometry certificates, alongside a money-back guarantee. The site outlines an ordering workflow where buyers contact the company directly by email, phone, or letter to receive a price quotation within 24 hours. Fulfillment is handled via worldwide delivery using express courier services, while pricing schedules remain unstated.
Pros
- Over 20 years of operating experience
- HPLC and mass spectrometry certificates provided with orders
- Worldwide delivery via express courier
Considerations
- Public pricing schedules are unstated
- Specific monetary minimum order values are unstated
- Recombinant and solution phase synthesis methods are not offered
Score Breakdown
Not currently ranked. We hold suppliers out of the numbered rankings until enough of the rubric has been verified, so that missing information can never work in a supplier's favour:
- overall evidence coverage 33% (needs 60%)
- Testing & Documentation 28% verified (needs 60%)
- Wholesale Capabilities 33% verified (needs 60%)
The dimension scores below reflect only what we were able to verify.
Overall score is calculated from these seven dimensions using the house weighting, and each dimension is calculated from the verified criteria beneath it. Open a dimension to see every criterion, its verified state, the source it was verified from and the date it was checked. Comparison pages may re-weight the dimensions for buyer intent.
Testing & Documentation 25%
Not assessed
- ?Independent third-party testingNot confirmed
- ✓Batch-specific certificates of analysisSource: caslo.com/peptide-synthesis · checked 2026-09-08Verified
- ?COAs publicly accessibleNot confirmed
- ?HPLC purity results publishedNot confirmed
- ✓Mass spectrometry / identity verificationSource: caslo.com/peptide-synthesis-techniques · checked 2026-09-08Verified
- ?Testing laboratory named or identifiableNot confirmed
- ?Lot / batch traceabilityNot confirmed
- ?Documentation package available to wholesale buyersNot confirmed
Too little of this dimension could be verified to publish a score, so it is excluded from the overall and the other weights are rebalanced.
Business Transparency 20%
10.0
- ✓Registered business entity namedSource: caslo.com/ · checked 2026-09-08Verified
- ✓Verifiable physical addressSource: caslo.com/ · checked 2026-09-08Verified
- ?Named team, ownership or leadershipNot confirmed
- ✓Direct contact email or phone, not a form onlySource: caslo.com/ · checked 2026-09-08Verified
- ?Published terms, shipping and returns policiesNot confirmed
- ?Operating or shipping jurisdictions disclosedNot confirmed
- ?Business registration independently verifiableNot confirmed
- ✓Manufacturing or sourcing origin statedSource: caslo.com/peptide-synthesis · checked 2026-09-08Verified
10 of 10 verified points met → 10.0/10. Items shown as not confirmed are excluded from both sides of that calculation.
Wholesale Capabilities 15%
Not assessed
- ?Published wholesale or B2B programNot confirmed
- ?Tiered or volume pricingNot confirmed
- ✓Minimum order quantity statedSource: caslo.com/ · checked 2026-09-08Verified
- ✓Bulk quantities (gram scale and above)Source: caslo.com/ · checked 2026-09-08Verified
- ?Distributor or reseller supportNot confirmed
- ?Private-label programNot confirmed
- ✓Custom orders acceptedSource: caslo.com/ · checked 2026-09-08Verified
- ?Dedicated wholesale enquiry / RFQ processNot confirmed
Too little of this dimension could be verified to publish a score, so it is excluded from the overall and the other weights are rebalanced.
Manufacturing Capabilities 15%
Not assessed
- ?In-house synthesis rather than resale onlyNot confirmed
- ?Manufacturing facility or partner disclosedNot confirmed
- ?Stated quality system (cGMP, ISO or equivalent)Not confirmed
- ✓Custom sequence synthesis offeredSource: caslo.com/ · checked 2026-09-08Verified
- ✓Selectable purity gradesSource: caslo.com/peptide-synthesis · checked 2026-09-08Verified
- ✓Stated production scale rangeSource: caslo.com/ · checked 2026-09-08Verified
- ✓Lyophilisation / fill-finish capabilitySource: caslo.com/peptide-synthesis · checked 2026-09-08Verified
- ?Stability or storage data publishedNot confirmed
Too little of this dimension could be verified to publish a score, so it is excluded from the overall and the other weights are rebalanced.
Commercial Purchasing 10%
Not assessed
- ?Business account application or approvalNot confirmed
- ?Quotes and purchase orders supportedNot confirmed
- ?Account-level or contract pricingNot confirmed
- ?Multiple business payment methodsNot confirmed
- ✓Formal invoicing and documentationSource: caslo.com/contact-us · checked 2026-09-08Verified
- ?Named contact or account managerNot confirmed
- ?Repeat-order or standing-order supportNot confirmed
- ?Payment terms available to approved accountsNot confirmed
Too little of this dimension could be verified to publish a score, so it is excluded from the overall and the other weights are rebalanced.
Fulfillment & Logistics 10%
Not assessed
- ?Domestic shipping with stated timeframesNot confirmed
- ✓International shippingSource: caslo.com/ · checked 2026-09-08Verified
- ?Cold-chain or temperature-controlled shippingNot confirmed
- ?Lead times publishedNot confirmed
- ?Order tracking providedNot confirmed
- ?Stock or availability visible before orderingNot confirmed
- ?Stated packaging and handling standardsNot confirmed
- ?Documented returns or discrepancy processNot confirmed
Too little of this dimension could be verified to publish a score, so it is excluded from the overall and the other weights are rebalanced.
Website / Buyer Experience 5%
Not assessed
- ✓Secure, working site with no broken commerce pathsSource: caslo.com/ · checked 2026-09-08Verified
- ?Usable on mobileNot confirmed
- ?Product pages with specification detailNot confirmed
- ?Search and filtering across the catalogueNot confirmed
- ?COAs reachable in a few clicksNot confirmed
- ?Pricing visible or obtainable without frictionNot confirmed
- ?Clear path to the wholesale or B2B routeNot confirmed
- ✓Visible support channelsSource: caslo.com/contact-us · checked 2026-09-08Verified
Too little of this dimension could be verified to publish a score, so it is excluded from the overall and the other weights are rebalanced.
Rubric score 10.0 across the 33% of the rubric verified so far, adjusted for evidence coverage to a published score of 8.0. How this is calculated
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