Industrial chemicals · Taylor, TXCertificate of Analysis
Sample Certificate of Analysis
Magnesium Hydroxide Technical
Sample COA. Contact Alliance Chemical with your lot number to request a lot-specific COA.
- CAS number
- 1309-42-8
- Structure
Structure · PubChem - Assay specification
- 99.0% min
- Answer summary
Sample specification reference for Magnesium Hydroxide Technical. 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 (Mg(OH)2) | 99.0% min | 99.36% | by difference |
| Aluminum Oxide (Al2O3) | 0.15 % max. | 0.023 % | — |
| Calcium (as CaO) | 0.20% max | 0.11% | — |
| Calcium Oxide (CaO) | 0.70 % max. | 0.11 % | — |
| Fineness, % passing 325 mesh | 99.5 % min. | 99.99 % | — |
| Iron (as Fe) | 0.01% max | 0.0023% | — |
| Iron Oxide (Fe2O3) | 0.20 % max. | 0.0035 % | — |
| Magnesium Oxide (MgO), equivalent | 67.7 % min. | 68.6 % | — |
| Median particle size | 0.8 - 2.0 microns | 1.5 | — |
| Particle Size Distribution MsD50 | 1.70 mic max | 1.41 | — |
| Particle Size Distribution MsD90 | 4.70 mic max | 3.83 | — |
| Particle size: Residue on 325 mesh | 1.0% max | 0.01% | wet sieve |
| Silicon Oxide (SiO2) | 0.35 % max. | 0.035 % | — |
| Sulfates (as SO4) | 0.15% max | 0.058% | — |
| Surface area (BET) | 7 - 18 m2/g | 12.2 | — |
| Free moisture | 2.0 % max. | 0.28 % | — |
| Chloride (Cl) | 0.35 % max. | 0.070 % | — |
| Loss on ignition | 30.0 - 33.0 % | 31.5 % | — |
| pH, 5 % aqueous slurry @ 25 C | 9.5 - 10.8 | 10.1 | pH meter, glass electrode (ASTM E70) |
| Bulk density, loose | 0.30 - 0.60 g/cm3 | 0.46 g/cc | Scott volumeter / ASTM D1895 Method A |
| Whiteness (ISO brightness, R457) | 95.0 % min. | 98.0 % | Reflectance photometer, ISO 2470 |
| Sodium (as Na2O) | 0.30 % max. | 0.065 % | ICP-OES (or flame photometry) |
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.
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