Quantitative Peroxide, Chemical Analysis of Ozonated Glycerin for Cosmetic Raw Material Testing

We’re seeking a contract laboratory for recurring quantitative testing of anhydrous ozonated glycerin (ozonated glycerol), a specialized cosmetic/wellness raw material. Testing will involve 5–10 batches submitted periodically over 6–12 months, with interest in a volume-based testing agreement.

Sample specifications:

• Material: Pure anhydrous ozonated glycerin
• Matrix: 100% glycerin-based, water-soluble polyol
• Lipid content: 0% (no oils, fats, or lipids)
• Available sample quantity: 50–100 mL per batch

Required testing:

1. Total Peroxide/Oxidant Value: Quantitative determination of reactive peroxide or oxidant content, reported in mEq/kg or mg/L. Testing must accommodate the water-soluble glycerin matrix using modified iodometric titration or another validated quantitative method. Standard lipid-based peroxide value methods are not suitable without appropriate adaptation.
2. Chemical Profiling (Optional/Preferred): LC-MS or another suitable analytical technique to assess chemical changes following ozonation, including the presence and relative abundance of glyceric acid and glycolic acid byproducts.
3. Water Activity (a_w): Measurement to assess water activity in the finished raw material.

Testing volume and schedule:

• Approximately 5–10 batches over 6–12 months
• Samples submitted periodically or grouped in sets of 2–3
• Potential for an initial trial sample to establish method compatibility

Quotation requirements:

• Per-batch pricing with volume discounts for 5–10 samples
• Separate method development, adaptation, or validation fees, including options to distribute costs across the testing agreement
• Pricing for streamlined electronic data reports (EDD/CSV or single-page summaries) versus formal PDF reports
• Standard and expedited turnaround times

Laboratories with experience in modified iodometric titration, LC-MS analysis, or testing of ozonated polyols are encouraged to confirm their capabilities and sample acceptance requirements.