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pH Testing
pH testing under USP <791> — a fast, low-touch check on each compounded lot.
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Compendial standard this method is validated to.
Business days from sample receipt to report.
Compounded formulations supported to date.
WHY YOU NEED IT
Why pH Testing Matters
Protect stability
A preparation's pH strongly affects how fast the active ingredient degrades; USP <791> testing confirms it sits in the intended range.
Comfort and tolerability
Out-of-range pH can cause pain or irritation at the injection site — a quick measurement catches it before release.
Fast and low-touch - DELETE
pH is a rapid check routinely expected as part of releasing many compounded preparations. (pH testing is destructive) - DELETE
OUR PROCESS
How we run this test for you
Method Suitability
Proving the method first
Before any lot release, we validate that the test method performs reliably for your product — the compliance step that comes first.
N/A
Lot Release
Releasing every batch
Our core service — we run the test on each lot so you can release the batch to patients with confidence.
1-2 vials (depends on volume per vial)
> 2mLs
Stability Studies
Across your stability timeline
The same test run at each stability timepoint — for example, to support a longer beyond-use date (BUD).
1-2 vials (depends on volume per vial)
> 2mLs
TECHNOLOGY
A calibrated, temperature-controlled reading.
01
Calibrate with buffers
The meter is calibrated with NIST standard buffers bracketing the expected range before any sample is read.
02
Measure at temperature
The electrode reads the preparation, accounting for the effect of temperature on the pH.
03
Compare to spec
We report the pH and temperature to you, allowing you to check against the expected value
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TALK TO A SCIENTIST
Tell us what you need tested
Whether you need testing guidance, a quote, or just have questions — we’re here. A scientist will follow up within one business day.
USP-compliant, validated methods
Response within one business day
No obligation — guidance and quotes welcome
For service requests, quotes, or technical questions, email our support team.
info@saphobio.com
Phone
Available Monday to Friday, 9:00 AM – 6:00 PM (Pacific Time).
Text us: +1 (929) 437-6148
Site Visit
Visits by appointment only. Please contact us to schedule.
1068 Washington St. STE B, San Carlos, CA 94070
1068 Washington St Ste B, San Carlos, CA 94070
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