Industrial chemicals · Taylor, TXTechnical Data Sheet
Magnesium Hydroxide Technical
Identity & Composition
- Product Name
- Magnesium Hydroxide Technical
- Alliance Code
- magnesium-hydroxide-technical
- Grade
- —
- Concentration
- —
- CAS Number
- 1309-42-8PubChem
- Formula
- H2MgO2PubChem
- Molecular Weight
- 58.320PubChem
- Product Type
- pure_substance
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (Mg(OH)2) | 99.0% min | 99.3% | by difference | Supplier specification |
| Aluminum Oxide (Al2O3) | 0.15 % max. | 0.03 % | — | Supplier specification |
| Calcium (as CaO) | 0.20% max | 0.12% | — | Supplier specification |
| Calcium Oxide (CaO) | 0.70 % max. | 0.12 % | — | Supplier specification |
| Fineness, % passing 325 mesh | 99.5 % min. | 99.95 % | — | Supplier specification |
| Iron (as Fe) | 0.01% max | 0.004% | — | Supplier specification |
| Iron Oxide (Fe2O3) | 0.20 % max. | 0.006 % | — | Supplier specification |
| Magnesium Oxide (MgO), equivalent | 67.7 % min. | 68.6 % | — | Supplier specification |
| Median particle size | 0.8 - 2.0 microns | 1.4 | — | Supplier specification |
| Particle Size Distribution MsD50 | 1.70 mic max | 1.30 | — | Supplier specification |
| Particle Size Distribution MsD90 | 4.70 mic max | 3.50 | — | Supplier specification |
| Particle size: Residue on 325 mesh | 1.0% max | 0.05% | wet sieve | Supplier specification |
| Silicon Oxide (SiO2) | 0.35 % max. | 0.05 % | — | Supplier specification |
| Sulfates (as SO4) | 0.15% max | 0.06% | — | Supplier specification |
| Surface area (BET) | 7 - 18 m2/g | 12.5 | — | Supplier specification |
| Free moisture | 2.0 % max. | 0.3 % | — | Supplier specification |
| Chloride (Cl) | 0.35 % max. | 0.08 % | — | Supplier specification |
| Loss on ignition | 30.0 - 33.0 % | 31.5 % | — | Supplier specification |
| Whiteness (ISO brightness, R457) | 95.0 % min. | 97.5 % | Reflectance photometer, ISO 2470 | Interpreted |
| Sodium (as Na2O) | 0.30 % max. | 0.07 % | ICP-OES (or flame photometry) | Interpreted |
Specification values are guaranteed limits. Typical values are representative of production lots and are not guaranteed. Lot-specific certificates of analysis ship with every order.
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade — | — | — | current | current |
| ACS | — | — | magnesium-hydroxide-acs | View TDS → |
Typical assay shown is the rolling-window mean from the sibling product's most recent lots. Grade selection drives downstream end-use — verify the sibling grade matches your specification before substitution.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Dry Powder, Liquid; Pellets or Large Crystals; Liquid; Water or Solvent Wet Solid; Dry Powder; Other Solid | Published reference |
| Form | Solid | Published reference |
| Odor | Odorless | Published reference |
| pH | 9.5 - 10.8 | Interpreted |
| Density | 0.30 - 0.60 g/cm3 | Interpreted |
| Boiling Point | 354 | Published reference |
| Melting Point | 350 °C (decomposes) | Published reference |
| Flash Point | N/A | Published reference |
| Solubility (water) | Practically insoluble in water and in ethanol | Published reference |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- Not regulatedAdjudicated
- Hazard Class
- Not regulatedAdjudicated
- Packing Group
- Not regulatedAdjudicated
- Proper Shipping Name
- Not regulatedAdjudicated
GHS / OSHA HazCom 2012
- Signal Word
- Not regulatedAdjudicated
- H-Codes (Hazard Statements)
- —no canonical
- P-Codes (Precautionary Statements)
- —no canonical
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- —no canonical
- ACGIH TLV
- —no canonical
- NIOSH REL
- —no canonical
- NIOSH IDLH
- —no canonical
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: ECHA CLP Annex VI for harmonised classifications, NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Magnesium Hydroxide Technical. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
- Technical and industrial uses, including neutralization processes, waste water treatment, and paint applicationiclgroupv2.s3.amazonaws.com
- Acid neutralizationmagnesiaspecialties.com
- Flame retardant and smoke suppressant in plasticsmagnesiaspecialties.com
- Acid scavenger in elastomersmagnesiaspecialties.com
- Production of magnesium salts, ceramics, and specialty applicationsmagnesiaspecialties.com
Applications are drawn from published manufacturer and supplier documentation; each is sourced. Suitability for a specific use is the buyer's to confirm.
Storage & Handling
- Recommended Storage
- Store in original packaging in a dry, ventilated spaceiclgroupv2.s3.amazonaws.com
- Handling Precautions
- Use standard chemical PPE — splash goggles, gloves, lab coat. Refer to SDS for hazard-specific PPE requirements.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- dilute mineral acidsiclgroupv2.s3.amazonaws.com
- Shelf Life
- 36 monthsiclgroupv2.s3.amazonaws.comStored in original packaging in a dry, ventilated space
For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.
Packaging & Logistics
Shipping Description (US DOT)
Not regulated for transport.
Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-06-17 by Andre Taki, DOT Hazmat Specialist.
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.1 | 2026-06-17 | Canonical data re-verified: 3 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable).
| canonical_change |
| 1.0 | 2026-05-20 | Initial URL-first TDS published from canonical chemistry registry. | initial |
This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.