Industrial chemicals · Taylor, TXCertificate of AnalysisSample Certificate of Analysis
Glycerin USP Grade
USP Grade
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Sample COA. Lot-specific COAs ship with each order.
Specifications
| Parameter | Specification | Typical Result | Test Method |
|---|---|---|---|
| Assay (GC/Density) | 99 – 100 % | 99.5 % | GC or density |
| Acid Value | ≤ 1 mg KOH/g | — | Titration |
| Acidity | ≤ 1 % | 0.1 % | Titration |
| Appearance/Odor | — | — | Visual Inspection |
| Arsenic | ≤ 1.5 ppm | 0.45 ppm | Per specification |
| Chlorides | ≤ 30 ppm | 6 ppm | Ion chromatography |
| Color (APHA) | ≤ 10 APHA | 6 APHA | APHA |
| Heavy Metals (Pb) | ≤ 5 ppm | — | ICP |
| Lead (Pb) | ≤ 1 ppm | — | ICP-MS |
| Residue on Ignition | ≤ 1 % | — | Ignition |
| Specific Gravity @20°C | 1.261 – 1.263 g/mL | 1.26 g/mL | Hydrometer @ 25°C |
| Sulfates | ≤ 20 ppm | — | Ion chromatography |
| Viscosity | ≥ 556 | 567 | Per specification |
| Water (Karl Fischer) | ≤ 5 % | 0.4 % | Karl Fischer |
Generated . Values are representative of typical production lots and reflect the published specification range. Lot-specific COAs are provided with every shipment.