Full stated quantity, and nothing overstated — every active's purity and identity are measured, not claimed, and printed on its batch COA with counter-ion and water.
Full stated quantity, purity never overstated — measured on a per-lot COA.
Full quantity, nothing overstated — per-lot COA.
GHK-Cu in 2026 — A Formulator's Field Guide to Copper Tripeptide-1. Read our briefing →
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0.9% benzyl-alcohol bacteriostatic laboratory diluent
Overview
BAC Water is sterile water containing 0.9% benzyl alcohol as a preservative, supplied as a supporting laboratory diluent rather than a cosmetic active. The preservative limits microbial growth after repeated vial entry, while compatibility with the peptide, active, and downstream formulation workflow must be confirmed before use. Pepoderma supplies BAC Water in 3 ml, 10 ml, and 30 ml sterile vial formats. The release documentation identifies the fill volume and benzyl-alcohol content and covers sterility and bacterial endotoxin. Preservative-free sterile water should be selected where benzyl alcohol is incompatible with the material or evaluation method.
Who buys this, and why
Anti-aging peptide actives — Copper Tripeptide-1 (GHK-Cu), Acetyl Octapeptide-3 (SNAP-8), Palmitoyl Pentapeptide-4 (Matrixyl) — ship primarily to indie beauty brand founders building retail serums, established skincare R&D chemists extending an existing anti-wrinkle line, and med-aesthetic brand OEMs developing back-bar retail products. The defining formulation considerations are use-level optimisation (lower is often better at the working pH), carrier selection (aqueous vs. lipid-encapsulated), and chelator-free preservative systems. The data packet ships with guidance on all three on the lot report.
Primary buyer fit: skincare R&D chemists scoping a finished-product line and regional cosmetic-active distributors serving brand programmes.
Specifications
Documentation available on request
Regulatory note
Supporting laboratory diluent containing benzyl alcohol; not a cosmetic active or finished cosmetic product. Confirm preservative compatibility and destination-market sterility, endotoxin, packaging, and use requirements.
Frequently asked questions
BAC Water is sterile water containing 0.9% benzyl alcohol as a preservative, supplied as a supporting laboratory diluent rather than a cosmetic active. The preservative limits microbial growth after repeated vial entry, while compatibility with the peptide, active, and downstream formulation workflow must be confirmed before use. Pepoderma supplies BAC Water in 3 ml, 10 ml, and 30 ml sterile vial formats. The release documentation identifies the fill volume and benzyl-alcohol content and covers sterility and bacterial endotoxin. Preservative-free sterile water should be selected where benzyl alcohol is incompatible with the material or evaluation method.
Release specification for BAC Water (Bacteriostatic Water): ≥ 99.0% (component-wise for blends) by RP-HPLC, mass-spec confirmed identity, Karl-Fischer water content, and counter-ion quantitation. The COA is batch-specific (each lot has its own document, not a generic data sheet) and includes the chromatogram and mass spectrum as image attachments. Optional add-ons available per request: bacterial endotoxin testing, USP microbial limits, and sequence verification by tandem MS, useful for first-time qualification of a new supplier.
Lyophilized BAC Water (Bacteriostatic Water): store at Room temperature, protect from light. The typical re-test period is 24 months from manufacture date when held under these conditions; a current re-test date is printed on the COA so buyers approaching the limit can schedule confirmation testing rather than auto-discard. After reconstitution, aliquot and freeze; repeat freeze-thaw cycles are the dominant source of in-lab degradation and should be limited to three or fewer for analytical work.
Commercial terms on BAC Water (Bacteriostatic Water): MOQ On request, lead time 7–14 days from confirmation. Bulk pricing is offered in tiers, typical break points are 10 g, 100 g, 1 kg, and 10 kg, with separate OEM-fill pricing for vialed product. Quotes include the per-unit price, INCOTERMS (DDP recommended for most pharmacy and lab buyers; EXW or FCA for buyers with their own forwarder), payment terms, and the analytical packet scope. First reply is hand-written by a regulatory specialist within 24 business hours; we deliberately do not auto-respond because the first email is where the destination-specific compliance questions get asked.
BAC Water (Bacteriostatic Water) is supplied as a cosmetic-grade peptide active at ≥ 99.0% (component-wise for blends); cosmetic formulators can incorporate it directly into a finished serum or cream provided the carrier system has been validated for the peptide's stability profile. The SDS that ships with every lot carries the verified INCI name and CAS for the material as shipped; recommended use levels for anti-aging peptide actives typically sit in the 0.05–2% range depending on the specific peptide and the carrier matrix. Pepoderma's lot report includes per-active use-level guidance + the working pH range; for first-time formulation work, the Formulation Lab page also publishes a downloadable field guide for each featured active.
BAC Water (Bacteriostatic Water) performs best in chelator-free aqueous or glycerin-based carriers at near-neutral pH (typically 5.5–7.0 for copper-peptide actives; 4.5–7.0 for non-copper anti-aging peptides). Common incompatibility flags: EDTA and other strong chelators (sequester copper in Cu-peptides), high-concentration ascorbic acid (drives reductive degradation in some peptides), benzalkonium chloride and similar quats (interact with short peptides), and high-EDTA preservative blends. Place the peptide active downstream of any reductive antioxidants in the batch process, and consider lipid encapsulation for finished products with heavy oil-phase fractions.
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