Saline (0.9% Sodium Chloride Injection)
0.9% isotonic sodium-chloride reconstitution diluent
Overview
0.9% Sodium Chloride Injection, the standard isotonic saline diluent, sits in the catalogue as the default reconstitution medium for any peptide preparation that needs neutral pH and physiological osmolarity. The 0.9% NaCl concentration produces a solution at roughly 300 mOsm/L, matching the osmolality of blood plasma and minimising osmotic stress when the reconstituted material is delivered to cell-culture systems or administered in vivo. For the majority of synthetic peptides without aggregation tendency, this is the operational default. Exceptions exist, peptides like IGF-1 LR3 require acidic-pH diluents to remain in monomer form, and those exceptions are documented on the relevant SKU release packet rather than left to the receiving pharmacy to infer. Vialdyne releases 0.9% Saline in two sterile vial sizes, 3 ml and 10 ml, formulated from pharmaceutical-grade sodium chloride dissolved in Water for Injection. The release packet specifies sterility, LAL endotoxin per USP <85>, osmolality, and pH against the appropriate pharmacopoeia monograph for the destination market. EU GMP Annex 1 aseptic-process expectations are met for buyers operating into European-market 503B outsourcing or EU prescription compounding workflows.
Who buys this, and why
Custom-blend buyers are almost always OEM clients building a branded product around a specific ratio of two or more peptides. The development workflow is collaborative: ratio target, analytical method to verify it, stability protocol in the chosen carrier, and packaging selection are all defined in the OEM brief before the first commercial run. Sample-stage volumes are usually 5-10 g of finished blend; commercial MOQ depends on the components.
Primary buyer fit: 503A / 503B compounding pharmacies, academic and contract research laboratories, and regional distributors and re-sellers.
Specifications
- CAS
- (blend, components: sodium chloride 7647-14-5, water 7732-18-5)
- Purity (HPLC)
- ≥ 99.0% (component-wise for blends)
- Common vial sizes
- 3 ml, 10 ml
- MOQ
- On request
- Lead time
- 7–14 days
- Storage
- Room temperature
Documentation available on request
- Certificate of Analysis (COA)
- Ratio-verification HPLC
- Mass-spec identity of each component
- Stability of the blend (matrix-specific)
- Bacterial endotoxin (LAL, USP <85>)
- Sterile-fill documentation (where applicable)
- SDS / MSDS
- Private-label / OEM specification sheet
Regulatory note
Isotonic reconstitution diluent. Verify sterility, pyrogen (LAL), osmolality, and injectable-grade compliance with target market regulations.
Frequently asked questions
Why is 0.9% saline isotonic, and why does isotonicity matter for peptide reconstitution?▾
The 0.9% NaCl concentration (around 300 mOsm/L osmolality) matches the osmolality of normal blood plasma and extracellular fluid. Isotonic preparations do not drive net water movement across cell membranes when administered systemically, avoiding the haemolysis (in hypotonic preparations) or cell shrinkage (in hypertonic preparations) that would otherwise result from mismatched osmolality. For peptide reconstitution, isotonic saline produces working solutions that are physiologically compatible with both in vivo administration and most cell-culture assay buffers. Two exceptions are worth flagging: peptides requiring acidic pH cannot use isotonic saline, the 0.6% Acetic Acid Water diluent is the alternative for those; and sterile single-use preparations are typically better served by preservative-free SWFI.
Which pharmacopeia specifications apply to 0.9% saline for injection?▾
0.9% Sodium Chloride Injection carries monographs in every major pharmacopoeia: USP (US Pharmacopeia), EP (European Pharmacopeia), BP (British Pharmacopeia), and JP (Japanese Pharmacopeia). The combined specification covers identity (sodium and chloride content), sterility, bacterial endotoxin (LAL, typically less than or equal to 0.5 EU/mL for IV-grade material), pH (typically 4.5-7.0), particulate matter, and osmolality (typically 286-313 mOsm/L for the 0.9% concentration). Vialdyne's saline ships to the USP monograph by default; buyers in EU, UK, or APAC markets that require local pharmacopoeia compliance should specify at the quote stage so the released-batch documentation references the appropriate monograph for the receiving market.
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