Certificate of Analysis
Research Water
Batch B1726048 · Tested May 5, 2026
✓ Third-Party Lab Tested
Independent laboratory analysis confirms the composition and endotoxin safety of this bacteriostatic water solution per USP <85> standards. Results apply only to this specific batch; for research use only.
Sample Summary
Identification and intake details for this tested batch.
Product
Research Water
Batch / Lot
B1726048
Accession #
2605050015
Test Date
May 5, 2026
Appearance
Clear Liquid
Identity
Benzyl Alcohol
Solution Composition
HPLC with UV detection coupled with mass spectrometry (LC-MS)
Benzyl Alcohol Content
0.92%
Purity (HPLC-UV)
99.91%
Identity (LC-MS)
Benzyl Alcohol
Appearance
Clear Liquid
Test Method
HPLC with UV detection coupled with mass spectrometry (LC-MS)
What this test measures
Mass spectrometry confirms the identity of the preservative in solution and quantifies its concentration. Bacteriostatic water is sterile water preserved with benzyl alcohol, which inhibits microbial growth across repeated punctures of the vial.
Endotoxin Analysis
Limulus Amebocyte Lysate assay in accordance with USP <85>.
Result
✓ Cleared (below threshold)
Sensitivity
≤0.05 EU/mL
What this test measures
The LAL assay detects bacterial endotoxin at the reporting threshold shown. Both replicates must be below the threshold established by USP Chapter <85> to clear. For research-grade material handling only.
FR
Freedom Diagnostics
Full Certificate PDF
Signed laboratory-issued PDF with chromatogram and mass confirmation plots.
Test History for Research Water
6 independent lab tests on file for this product.
0.98%
Batch B1726048
May 11, 2026 · Benzyl Alcohol
0.92%
Batch B1726048
May 5, 2026 · Benzyl Alcohol
Cleared
Batch B0526
Apr 8, 2026 · Endotoxin
Cleared
Batch B0526
Feb 20, 2026 · Endotoxin
Cleared
Batch B0526
Feb 18, 2026 · Endotoxin
0.78%
Batch B0526
Feb 18, 2026 · Benzyl Alcohol
Frequently Asked Questions
Quick references for what each test means.
Why are endotoxin tests run in duplicate?
USP <85> requires duplicate analysis to rule out measurement error. Both replicates must be below the sensitivity threshold (typically ≤0.05 EU/mL) for the batch to pass. Disagreement between replicates triggers a re-test.
Does "Cleared" mean safe for human use?
No. "Cleared" here means the batch meets the USP <85> endotoxin reporting threshold — a standard relevant to laboratory research materials. All products from Oath Research are strictly for research use only and are not approved for human, veterinary, diagnostic, or therapeutic applications.
What does this water certificate test for?
Bacteriostatic water is sterile water preserved with benzyl alcohol. This certificate confirms the preservative's identity by mass spectrometry and quantifies its concentration, verifying the solution is correctly formulated. Separate endotoxin certificates for the same lot test against USP <85> standards.
Are all my orders from this exact batch?
Not necessarily — batches are rotated as inventory moves. Check the batch code on your vial against the test history above to find the matching certificate. Every batch we sell has been independently tested.
Research Use Only
The peptides tested are intended for research use only and are not approved for human or veterinary use, diagnostic, therapeutic, or clinical applications. Results apply only to the specific sample provided and should be interpreted by qualified professionals within the scope of the intended research.