Industrial chemicals · Taylor, TXCertificate of Analysis
Sample Certificate of Analysis
100% USP Grade Pure Castor Oil
USP Grade · 100%
Sample COA. Contact Alliance Chemical with your lot number to request a lot-specific COA.
- CAS number
- 8001-79-4
- Structure
Structure · PubChem - Grade
- USP Grade · 100%
- Assay specification
- NLT 90.0%
- Answer summary
Sample specification reference for 100% USP Grade Pure Castor Oil. Source-record results are reference values, not measurements for your lot.
Last reviewed 2026-06-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
Specifications
| Parameter | Specification | Source reference result | Test Method |
|---|---|---|---|
| Assay (triglyceride of ricinoleic acid) | NLT 90.0% | 99.6 % | USP <401> / GC of fatty acid methyl esters |
| Acid Value | NMT 2.0 | 0.31 | USP <401> Fats and Fixed Oils, Procedures, Acid Value |
| Composition of fatty acids — Ricinoleic acid | 85.0–92.0 | 87.9 | GC, USP Fats and Fixed Oils <401> |
| Distinction from most other fixed oils | It is only partly soluble in solvent hexane (distinction from most other fixed oils), but it yields a clear liquid with an equal volume of alcohol (foreign fixed oils). | Passes test | Solubility in solvent hexane / alcohol |
| Heavy Metals, Method II | 0.001% max | 0.00008 % | Heavy metals (as Pb), sulfide colour comparison against lead standard |
| Hydroxyl Value | 160–168 | 164 | USP <401> Fats and Fixed Oils, Procedures, Hydroxyl Value |
| Lead | Not more than 0.1 mg/kg | 0.009 mg/kg | FCC lead limit test / ICP-MS |
| Peroxide Value | NMT 10.0 | 1.8 | USP <401> Fats and Fixed Oils, Procedures, Peroxide Value |
| Specific Gravity @ 25°C | 0.957 – 0.961 | 0.959 | USP |
| Unsaponifiable Matter | NMT 0.8% | 0.34 % | USP <401> Fats and Fixed Oils, Procedures, Unsaponifiable Matter |
| Water | NMT 0.3% | 0.059 % | USP <921> |
| Free Fatty Acids | NMT 3.5 mL of 0.10 N sodium hydroxide per 10 g (≈1.0% max as oleic) | Passes test | USP |
| Iodine Value | 83 – 88 | 86.0 | USP |
| Saponification Value | 176 – 182 | 179 | USP |
| Refractive Index @ 25 °C | 1.477 - 1.481 | 1.478 | Abbe refractometer, AOCS Cc 7-25 |
| Color (Gardner) | NMT 2 | 1 | AOCS Td 1a-64 / ASTM D1544 |
| arsenic as as | 1.5 ppm max | 0.054 ppm | — |
| cadmium as cd | 0.5 ppm max | 0.0038 ppm | — |
| cis-11-eicosenoic acid | 1 % max | 0.35 % | — |
| identification of castor oil by ultraviolet absorption | 0.7 - 1.5 Abs | 1.1 | — |
| linoleic acid | 2.5 - 7 % | 4.76 % | — |
| linolenic acid | 1 % max | 0.46 % | — |
| mercury as hg | 3 ppm max | 0.0016 ppm | — |
| n-hexane | 290 ppm max | 1.0 ppm | — |
| oleic acid | 2.5 - 6 % | 4.26 % | — |
| other unidentified fatty acid | 1 % max | 0.17 % | — |
| palmitic acid | 2 % max | 1.0 % | — |
| stearic acid | 2.5 % max | 1.3 % | — |
Specification limits and source-record results are reproduced from the current product reference used by the TDS. This sample is not an issued certificate and does not identify a tested lot. Contact Alliance Chemical with the product and lot number for lot-specific documentation.
Need the Certificate of Analysis for your lot? Just ask.
Tell us the lot number from the container label and we will send the certificate over at no charge.