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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.

TAT

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> 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

pH is a rapid, non-destructive check routinely expected as part of releasing many compounded preparations.

OUR PROCESS

How we run this test for you

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.

Typically [X] vials per lot

STABILITY STUDIES

Across your stability timeline

The same test run at each stability timepoint — for example, to support a longer beyond-use date (BUD).

Usually [X] vials per timepoint

TECHNOLOGY

A calibrated, temperature-controlled reading.

Calibrate with buffers

The meter is calibrated with standard buffers bracketing the expected range before any sample is read.

Measure at temperature

The electrode reads the preparation once stable, with temperature controlled since pH shifts with it.

Compare to spec

The reading is checked against the product's target pH range to confirm it's in specification.

Other services

2 business days

Rapid Sterility Testing

Rapid sterility testing validated under USP <1223> — for compounding pharmacies that can’t afford a two-week wait on batch release.

Learn more →

15 calendar days

Compendial Sterility Testing

The traditional gold-standard sterility method, accepted by every regulatory body.

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2 business days

Endotoxin Testing

USP <85> bacterial endotoxin testing (LAL) for patient-safety release.

Learn more →

2 business days

Potency Testing

HPLC potency testing that confirms each compounded lot falls within ±10% of its label claim.

Learn more →

2 business days

Fill Volume Testing

USP <697> fill-volume verification (container content) for injectable products.

Learn more →

2 business days

Visual Inspection

USP <790> inspection for visible particulates in injectable products.

Learn more →

3 business days

Container Closure Integrity Testing

USP <1207> container closure integrity testing (vacuum decay) for sterile vials.

Learn more →

2 business days

Particle Counting

USP <788> sub-visible particulate matter counting for injectable products.

Learn more →

Antimicrobial Effectiveness Test USP <51>

30 business days

Antimicrobial Effectiveness Testing

USP <51> antimicrobial effectiveness (preservative) testing for multi-dose products.

Learn more →

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