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PuriLab Analytical
COA/BAC-2026-012Verified
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Certificate of Analysis

PuriLab Analytical

Bacteriostatic Water 10 mL

BAC-2026-012Lot EXO-BAC10-091Analyzed October 21, 2026
Bacteriostatic Water 10 mL vial as received

Timeline

Ordered
October 19, 2026
Received
October 21, 2026
Analyzed
October 21, 2026

Sample

Name
Bacteriostatic Water 10 mL
Expected
Benzyl Alcohol (preservative)
Amount
1 vial, aqueous solution, multi-dose 10 mL, sealed

Testing

Client
EXO Aminos
Test type
Preservative identity & content determination, pH
Method
HPLC-UV
Content, how much is in it
0.92%w/v
Label claim: 0.9% w/v
Identity, what it isMatch
Confirmed
Retention-time match vs. same-day reference standard
pH
pH electrode, measured October 21, 2026
5.65

Chromatogram

HPLC-UV

mAU010020030033.54Retention time (min), 2.85 to 4.3 min3.33
3.33 min, Benzyl Alcohol

Analyst Comments

Clear, colorless aqueous solution, blue-cap multi-dose vial, received sealed.

Analyst Signature

Max Barrett
Lab Director, PuriLab Analytical
Analysis date: October 21, 2026

Verification Code

BAC-3A28-5M9C
Verify at purilab.org/verify/BAC-3A28-5M9C

Scan to Verify

BAC-3A28-5M9C

Results apply solely to the sample as received and are not representative of any larger lot, batch, or production run. Findings are limited to the analytes stated above. PuriLab Analytical is an independent testing laboratory, is not CLIA certified or ISO 17025 accredited, does not sell or distribute any substance, and makes no representation as to the safety, legality, or fitness of any material for any use.

PuriLab Analyticaladmin@purilab.org
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