Frequently Asked
Questions, answered.
Everything researchers ask before sending us a sample — from shipping logistics to method compliance and Certificate of Analysis verification.
Samples & Submission
What sample size do you need for HPLC purity testing?
Typically 5–10 mg of dry powder is sufficient for HPLC purity, identity (LC-MS), and a retained sample. For full panels including LAL and Karl Fischer, we recommend 25 mg.
How should samples be shipped?
Ship lyophilized powders at ambient temperature in sealed vials, double-bagged with desiccant. Solutions and reconstituted material should ship cold-pack overnight. Include a printed copy of your submission form and chain-of-custody slip inside the secondary packaging.
Do I need to send a chain-of-custody form?
Yes. Every shipment must include a signed chain-of-custody form. You can download the template from the Sample Submission page or request a pre-filled PDF when you book your batch.
Do you accept international samples?
We accept samples from US-based clients only at this time. International requests require an importer of record and additional regulatory paperwork that we don't currently support.
Can you store retained samples?
Yes. We retain a portion of every submission at -20°C for 12 months at no additional charge. Extended retention is available on request.
Turnaround & Pricing
How long does turnaround take?
Standard turnaround is 5 business days from sample receipt for the Standard Panel and 7 business days for the Extended Panel. Rush 3-day service is available at +50%.
When does the turnaround clock start?
The clock starts the business day your sample is logged into our LIMS, not the day you ship. We email a receipt confirmation within 4 business hours of arrival.
Do you offer volume discounts?
Yes. Clients running 10+ batches per month qualify for tiered pricing. Contact us with your projected volume for a custom quote.
What payment methods do you accept?
ACH, wire transfer, and major credit cards. Net-30 terms are available for established clients after the first three batches.
Methods & Compliance
Are your methods USP-compliant?
Yes. Methods are adapted from USP, EP, and ICH guidelines, including USP <621> for HPLC, USP <85> for bacterial endotoxins, USP <921> for water content, and USP <467> for residual solvents.
How sensitive is your LAL endotoxin assay?
Our kinetic chromogenic LAL assay has a detection limit of 0.005 EU/mL, meeting USP <85> requirements for parenteral release testing.
Do you test research-grade peptides?
Yes. SteriGenix specializes in research-use-only peptides and small-molecule compounds. We do not test materials intended for human consumption.
Are you GMP-certified?
We operate under ISO 17025-aligned quality systems for research-use-only testing. We are not a cGMP-registered facility and do not release material for human clinical use.
Reports & Verification
What does a SteriGenix Certificate of Analysis include?
Every COA includes the analytical methods used, raw chromatograms, mass spectra, quantitative results, lot identifiers, and a unique batch ID that anyone can verify on our public /verify portal.
How can a customer verify a COA is authentic?
Every COA carries a unique batch ID and QR code. Anyone can paste the batch ID into the public Verify portal to confirm the report was issued by SteriGenix and view the published summary.
How long do you retain raw analytical data?
Raw chromatograms, spectra, and instrument metadata are retained for 7 years in our LIMS, accessible to the originating client on request.
Can I get my data in a custom template?
We deliver a standard SteriGenix COA by default. Custom templates and additional report formats (CSV, structured JSON) are available for an additional fee.
Still have questions?
Talk to our laboratory team.
We're happy to walk through method selection, sample requirements, or pricing for your specific compound class.
Contact the lab