Side-by-Side
Feature Comparison
Simple Peptide
AUREX
Testing Method
Simple Peptide
Single HPLC analysis
AUREX
HPLC-MS dual method (chromatography + mass spectrometry)
Purity Standard
Simple Peptide
Standard analytical purity
AUREX
99%+ verified via independent third-party labs
Manufacturing
Simple Peptide
Overseas sourcing
AUREX
100% US manufactured in cGMP-compliant facilities
COA Documentation
Simple Peptide
Basic Certificate of Analysis
AUREX
Full COA with chromatogram + mass spectrum + endotoxin assay
Shipping Speed
Simple Peptide
3-5 business day shipping
AUREX
Same-day dispatch before 3PM ET
Batch Freshness
Simple Peptide
Standard batch rotation
AUREX
Batches synthesized within 14 days of order
Cold Chain Packaging
Simple Peptide
Standard packaging
AUREX
Insulated cold-chain packaging with gel packs
Context
Why It Matters for Your Research
Why HPLC-MS Outperforms HPLC Alone
HPLC measures chromatographic purity but cannot confirm molecular identity. Mass spectrometry adds exact mass confirmation, detecting co-eluting impurities that HPLC alone misses. Dual-method verification is the USP-referenced standard for definitive compound identification.
Why US Manufacturing Matters
US-based cGMP facilities operate under FDA-inspected quality systems with documented SOPs, environmental controls, and batch records. Overseas sourcing introduces variability in regulatory oversight, cold-chain continuity, and documentation traceability.
Why Batch Freshness Matters
Lyophilized compounds begin slow degradation from the moment of synthesis. Fresher batches mean higher starting purity and longer effective shelf life. A 14-day synthesis-to-ship window minimizes time-dependent degradation before the compound reaches your lab.
Next Step
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Browse CompoundsFor research use only. Not for human consumption. This comparison is based on publicly available information and is intended to help researchers make informed procurement decisions. AUREX does not disparage competitors — all statements reflect factual differences in published methodologies, certifications, and operational practices. Information is accurate as of March 2026.
Related Resources
HPLC vs Mass Spectrometry
Understanding the two primary analytical methods for compound verification.
US vs Overseas Peptides
Quality control and compliance differences in peptide sourcing.
Choosing a Peptide Supplier
A researcher's evaluation checklist for supplier selection.
cGMP vs Non-cGMP Facilities
What cGMP compliance means for research compound quality.