Synthesyx Laboratories vs Gold Standard Analytics
Synthesyx Laboratories is a Las Vegas peptide lab offering identity, purity and net content by UHPLC-UV with diode array detection, USP <71> sterility and USP <85> endotoxin, on a certificate carrying a verification hash. Its senior chemists cite reference-material and proficiency-testing backgrounds, and the certificate prints the chromatogram, calibration statistics and system-suitability figures. The differences are in access and scope: intake is by application rather than checkout, no prices are published, identity is by retention time and UV spectral match rather than mass spectrometry, there is no heavy-metals or GC-MS offering, and no browsable public library or chain-of-custody evidence.
Synthesyx Laboratories (Synthesyx LLC), Las Vegas, Nevada, USA. synthesyx.com. Facts checked September 10, 2026.
What Synthesyx does well
- Per-component reporting on blends: identity, purity, retention time and net peptide stated for each peptide rather than averaged.
- Chromatographic detail on the certificate: USP tailing factor and plate count for every peak, impurity peaks listed with retention time and area.
- Six-level external standard curve with R² and RSD printed on the certificate, and the growth-promotion control reported on sterility.
- Peak-purity assessment across the peak by diode array to flag co-elution.
- Interim sterility read at 48–72 hours with the 14-day result issued as a revision.
- Plain research-use-only disclaimer and an explicit scope-of-result statement in the footer.
Side by side
| Gold Standard Analytics | Synthesyx Laboratories | |
|---|---|---|
| Location | Gold Standard Analytics5151 Mitchelldale St A10 STE B, Houston, Texas: one laboratory, tours by appointment. Prepaid UPS label included. | Synthesyx Laboratories5965 Harrison Dr Ste 8, Las Vegas, NV 89120. Tours and shipping terms not published. |
| Ordering | Gold Standard AnalyticsSelf-service intake with live quote, instant label, multi-service orders; API, MCP, Telegram and WhatsApp. No application. | Synthesyx LaboratoriesApplication required; the lab states it accepts new clients only when capacity allows. Ordering, pricing and payment happen inside the portal after approval. |
| Published pricing | Gold Standard AnalyticsEvery panel and add-on priced on the public catalog and intake builder before you sign in. | Synthesyx LaboratoriesNo prices on the public site; "see the price before you pay" applies inside the portal after approval. |
| Identity method | Gold Standard AnalyticsLC-MS/MS on an Agilent 6490 triple quadrupole, accurate mass within ±0.1 Da, alongside HPLC retention time. | Synthesyx LaboratoriesUHPLC-UV retention time against a characterised standard plus UV spectral match scored out of 1000 (≥990 to conform). No mass spectrometry listed. |
| Purity | Gold Standard AnalyticsHPLC-UV with diode array at 214 nm on Agilent 1290 Infinity II; chromatogram printed on the certificate. | Synthesyx LaboratoriesUHPLC-UV DAD at 214 nm with peak-purity check, impurity table, USP tailing and plate count per peak. |
| Net content | Gold Standard AnalyticsNet peptide content against a reference standard is a separate $29 add-on at every peptide tier. | Synthesyx LaboratoriesSix-level external standard curve, mg per vial and percent of label, R² and RSD on the certificate. Price not published. |
| Turnaround | Gold Standard Analytics5–7 business days guaranteed; 48–72 h expedited (+50%); 24–48 h priority (+100%), all published. | Synthesyx Laboratories3–5 business days for identity, purity and content; 2–4 for endotoxin; 14 days for sterility. No rush tier or written guarantee published. |
| Sterility | Gold Standard AnalyticsUSP <71> 14-day membrane filtration on MilliporeSigma Steritest, $195, one extra unit shared with endotoxin. | Synthesyx LaboratoriesUSP <71> with an abbreviated 48–72 h read on an interim certificate, then 14-day result; growth-promotion control reported. Requires an unopened vial. Price not published. |
| Endotoxin | Gold Standard AnalyticsUSP <85> kinetic chromogenic LAL on Charles River Endosafe nexgen-PTS, $199, positive product control on the certificate. | Synthesyx LaboratoriesUSP <85> in replicate with both replicates and the EU/mL threshold printed. Method platform and price not published. |
| Heavy metals and solvents | Gold Standard AnalyticsUSP <232>/<233> by Agilent 7850 ICP-MS, $169; residual solvents by GC-MS, USP <467>. | Synthesyx LaboratoriesNot offered; scope is identity, purity, content, sterility and endotoxin. |
| Instruments | Gold Standard AnalyticsAgilent 1290 Infinity II with DAD, Agilent 6490 triple quadrupole, Agilent 7850 ICP-MS, GC-MS, Endosafe nexgen-PTS, Steritest; photographed and named on certificates. | Synthesyx LaboratoriesUHPLC with diode array detector referenced (DAD1A trace shown); makes and models not published. |
| Public results | Gold Standard AnalyticsEvery certificate in a searchable public library by compound, lot or accession, failures and retractions included; a client cannot remove one. | Synthesyx LaboratoriesCertificates verify by hash, QR code and certificate number against the lab register; no browsable library found. |
| Chain of custody | Gold Standard AnalyticsEvery package opened on camera, container photographed, blind-coded; footage retained three years and viewable from the certificate. | Synthesyx LaboratoriesNot published. |
| ISO/IEC 17025 | Gold Standard AnalyticsOperated to ISO/IEC 17025 expectations with GLP-style data integrity. Not accredited. | Synthesyx LaboratoriesCites 30 years writing and auditing ISO quality systems; no accreditation claimed or scope certificate linked. |
| Guarantee | Gold Standard AnalyticsMiss the quoted turnaround, or an accredited lab contradicts us on a retest of the retained sample, and the panel fee is refunded. | Synthesyx LaboratoriesNone published; the site says its turnaround figures are the ones it works to. |
Sources: synthesyx.com footer, checked Sep 10, 2026; synthesyx.com, Intake and capacity section, Sep 10, 2026; synthesyx.com, checked Sep 10, 2026; synthesyx.com, What we test, Sep 10, 2026; synthesyx.com/verify, Sep 10, 2026; synthesyx.com, Behind the certificate, Sep 10, 2026.
Published prices
| Test | Gold Standard Analytics | Synthesyx Laboratories |
|---|---|---|
| Peptide identity, purity and net content | Gold Standard AnalyticsView current pricing | Synthesyx Laboratories— |
| GLP-1 class panel | Gold Standard AnalyticsView current pricing | Synthesyx Laboratories— |
| Endotoxin, USP <85> | Gold Standard Analytics+$199 | Synthesyx Laboratories— |
| Sterility, USP <71> | Gold Standard Analytics— | Synthesyx Laboratories$195 |
| Heavy metals, ICP-MS | Gold Standard Analytics+$169 | Synthesyx Laboratories— |
| Full panel with endotoxin, metals and sterility | Gold Standard AnalyticsView current pricing | Synthesyx Laboratories— |
Gold Standard prices are the published catalog. Synthesyx publishes no prices on synthesyx.com; pricing is shown inside its client portal after an application is approved (checked September 10, 2026). A dash means no public price. Synthesyx does not offer heavy metals.
Questions about Synthesyx Laboratories and Gold Standard Analytics
Is Gold Standard a Synthesyx alternative?
Yes. Both test research peptides for identity, purity, net content, USP <71> sterility and USP <85> endotoxin with a hash-verifiable certificate. Gold Standard adds mass-spectrometric identity, ICP-MS heavy metals, GC-MS solvents, published prices, self-service ordering, a browsable public library and video chain of custody.
How do I order testing from Synthesyx?
You apply for an account; Synthesyx says it accepts new clients only when it can absorb the volume without moving other clients' dates. Once approved you order and pay in its portal. Gold Standard has no application: build the order, see the quote, pay and print the prepaid label in one session.
How much does Synthesyx charge?
No prices are published on synthesyx.com as of September 10, 2026; they appear in the portal after approval. GSA peptide base pricing includes LC-MS/MS identity and HPLC purity. Net peptide content is a separate $29 add-on at every peptide tier. Select the compound and tests in the current intake for a quote.
Does Synthesyx use mass spectrometry for identity?
Its published identity method is UHPLC-UV retention time plus a UV spectral match scored out of 1000. Gold Standard confirms identity by LC-MS/MS on an Agilent 6490 triple quadrupole (±0.1 Da) in addition to retention time, which distinguishes peptides with similar UV spectra.
Does Synthesyx test heavy metals?
No. Its scope is identity, purity, content, sterility and endotoxin. Gold Standard runs USP <232>/<233> heavy metals by ICP-MS for $169 on the same accession.
How fast is Synthesyx?
It lists 3–5 business days for identity, purity and content, 2–4 for endotoxin and 14 days for sterility, with an interim sterility read at 48–72 hours. Gold Standard guarantees 5–7 business days with published expedited and priority tiers and refunds the fee if the quoted turnaround is missed.
Can I verify a Synthesyx COA here?
No. Synthesyx certificates verify at synthesyx.com/verify by the hash printed on the certificate. Gold Standard certificates verify here by accession number and are listed in a public library anyone can browse.
Where is Synthesyx located?
Synthesyx LLC lists 5965 Harrison Dr Ste 8, Las Vegas, NV 89120. Gold Standard operates from 5151 Mitchelldale St A10 STE B, Houston, TX 77092, with tours by appointment.
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Submit a sample
Prepaid domestic label, public certificate, chain-of-custody video. Standard turnaround 5–7 business days.