Industrial chemicals · Taylor, TXTechnical Data Sheet
Magnesium Chloride Hexahydrate FCC, USP GRADE
USP Grade · 46.63%
Identity & Composition
- Product Name
- Magnesium Chloride Hexahydrate FCC, USP GRADE
- Alliance Code
- magnesium-chloride-hexahydrate-fcc-usp-grade
- Grade
- USP Grade
- Concentration
- 46.63%
- CAS Number
- 7791-18-6PubChem
- Formula
- Cl2H12MgO6PubChem
- Molecular Weight
- 203.30PubChem
- Product Type
- pure_substance
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (MgCl2·6H2O), USP | 98.0 - 101.0 percent | 99.5 percent | Complexometric titration with 0.05 M edetate disodium VS, eriochrome black TS indicator, to a blue endpoint (1 mL = 10.17 mg MgCl2·6H2O) | USP monograph |
| Aluminum (only where labeled as intended for use in hemodialysis) | 1 µg per g | 0.2 µg per g | USP <206>, using 2.0 g to prepare the Test Preparation | USP monograph |
| Ammonium (NH₄) | ≤0.005 % | 0.0005 % | — | FCC |
| Barium | No turbidity is produced within 2 hours | Passes test | Dissolve 1 g in 10 mL water, add 1 mL of 2 N sulfuric acid; observe 2 hours | USP monograph |
| Calcium (Ca) | ≤0.01 % | 0.003 % | — | USP monograph |
| Description | Colorless flakes or crystals; hygroscopic; very soluble in water, freely soluble in alcohol | Passes test | Visual | FCC |
| Heavy metals | 0.001% | 0.0002% | USP <231>, 2 g dissolved in water to make 25 mL. | USP monograph |
| Identification (FCC) | A 1:10 aqueous solution gives positive tests for Magnesium and for Chloride | Passes test | Positive tests for Magnesium and for Chloride on a 1:10 aqueous solution | FCC |
| Identification (USP) | A solution (1 in 20) responds to the tests for Magnesium and for Chloride | Passes test | USP <191> tests for Magnesium and for Chloride, on a 1 in 20 solution | USP monograph |
| Insoluble matter | Max. 0.005% | 0.001% | Gravimetric. | Supplier specification |
| Lead (Pb) | ≤4 mg/kg | 0.1 mg/kg | — | FCC |
| Potassium | No turbidity is produced within 5 minutes | Passes test | Dissolve 5 g in 5 mL water, add 0.2 mL sodium bitartrate TS; observe 5 minutes | USP monograph |
| Sulfate (SO₄) | ≤0.005 % | 0.001 % | — | USP monograph |
| Iron (Fe) | Max. 0.001% (10 mg/kg) | 0.00005 % | Colorimetric, USP <241> / ICP-OES | Interpreted |
| Arsenic (as As) | Max. 3 mg/kg | 0.05 mg/kg | USP <211> / FCC arsenic limit test (or ICP-MS) | 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.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Other Solid | Published reference |
| Form | Solid | Published reference |
| pH | between 4.5 and 7.0, in a 1 in 20 solution in carbon dioxide-free water | USP monograph |
| Boiling Point | 1412 | Published reference |
| Melting Point | 117 | Published reference |
| Flash Point | N/A | Published reference |
| Solubility (water) | High water solubility, moderate alcohol solubility | Published reference |
Materials of ConstructionService envelope ≈ 46.63%
| Material | Rating | Max T (°C) | Notes | Source |
|---|---|---|---|---|
Buna-N (NBR) elastomer | Good | 60 | Acceptable | Cole-Parmer Chemical Compatibility |
EPDM elastomer | Excellent | 100 | Standard for brine gaskets. | Parker O-ring Chemical Compatibility |
Viton (FKM) elastomer | Excellent | 100 | Preferred elastomer | Cole-Parmer Chemical Compatibility |
Borosilicate Glass glass ceramic | Excellent | 100 | Universally inert to salt solutions. | Cole-Parmer Chemical Compatibility |
Concrete (sealed) glass ceramic | Good | — | Acceptable with epoxy coating | Cole-Parmer Chemical Compatibility |
304 stainless steel metal | Fair | 25 | Pitting in chloride-rich service | Cole-Parmer Chemical Compatibility |
316L Stainless Steel metal | Good | 60 | Watch for chloride pitting above 60 °C in chloride salts. | NACE Chloride Pitting Guidelines |
Aluminium metal | Poor | — | Pitting; not recommended for brine | Cole-Parmer Chemical Compatibility |
Carbon steel metal | Poor | — | Rapid rust in brine | Cole-Parmer Chemical Compatibility |
FRP thermoplastic | Excellent | 60 | Common bulk-storage | Cole-Parmer Chemical Compatibility |
HDPE thermoplastic | Excellent | 60 | Universal salt brine compatibility. | Cole-Parmer Chemical Compatibility |
PP thermoplastic | Excellent | 80 | Acceptable for hot brine | Cole-Parmer Chemical Compatibility |
PVC thermoplastic | Excellent | 60 | Standard for brine piping. | Cole-Parmer Chemical Compatibility |
Ratings reflect the service envelope (concentration × temperature) shown. Always confirm against your specific duty cycle and contact-time before equipment selection. The most cautious rating across overlapping references is shown.
Materials Selection Tool
Showing 13 of 13 materials compatible at the selected envelope.
| Material | Rating | Max T (°C) | Notes |
|---|---|---|---|
Buna-N (NBR) elastomer | Good | 60 | Acceptable |
EPDM elastomer | Excellent | 100 | Standard for brine gaskets. |
Viton (FKM) elastomer | Excellent | 100 | Preferred elastomer |
Borosilicate Glass glass ceramic | Excellent | 100 | Universally inert to salt solutions. |
Concrete (sealed) glass ceramic | Good | — | Acceptable with epoxy coating |
304 stainless steel metal | Fair | 25 | Pitting in chloride-rich service |
316L Stainless Steel metal | Good | 60 | Watch for chloride pitting above 60 °C in chloride salts. |
Aluminium metal | Poor | — | Pitting; not recommended for brine |
Carbon steel metal | Poor | — | Rapid rust in brine |
FRP thermoplastic | Excellent | 60 | Common bulk-storage |
HDPE thermoplastic | Excellent | 60 | Universal salt brine compatibility. |
PP thermoplastic | Excellent | 80 | Acceptable for hot brine |
PVC thermoplastic | Excellent | 60 | Standard for brine piping. |
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 Chloride Hexahydrate FCC, USP GRADE. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
- Food additive functioning as a color-retention agent and firming agent (FCC Food Grade specification)mubychem.com
- Coagulant used in the preparation of cheese and tofu (sold as nigari in Japan, lushui in China)mubychem.com
- Ingredient in baby formula milkmubychem.com
- Use in hemodialysis, where the USP material is labeled as intended for that use (and must then meet the 1 ppm aluminum limit)trungtamthuoc.com
- USP Grade material can be used in food, drug, or medical applicationslaballey.com
- Reagent, personal care, and gardening useslaballey.com
- May be intended for use in hemodialysis when labeled accordingly.trungtamthuoc.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
- Preserve in tight containers (USP packaging and storage requirement). The material is hygroscopic.ftp.uspbpep.com
- Handling Precautions
- Standard chemical PPE — dust mask and goggles for handling of fine grades. Avoid generating airborne dust.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Specific incompatibilities depend on the salt — consult the SDS. Many salts react with strong acids to release gases.Class-level guidance — not product-specific; the SDS controls.
- Shelf Life
- Consult Technical Services for product-specific shelf life
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: 4 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.