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Product Name: Magnesium Hypophosphite
Chemical Formula: Mg(H₂PO₂)₂
Synonyms: Magnesium dihydrogen phosphite
CAS Number: 10377-57-8
Recommended Use: Used in flame-retardant formulations, specialty chemical synthesis, and as a reducing agent.
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GHS Classification: Not classified as hazardous under GHS.
Label Elements: No pictograms required.
Signal Word: None
Hazard Statements: May cause mild irritation to eyes, skin, or respiratory tract, particularly in dust form.
Precautionary Statements: Avoid inhaling dust or contact with eyes or skin. Wear appropriate personal protective equipment during handling.
Chemical Name: Magnesium Hypophosphite
Percentage: >98%
Impurities: Possible trace levels of phosphate or other byproducts from synthesis.
Molecular Weight: 174.242 g/mol
Ingredient Notes: No stabilizers or additives present. Manufactured in controlled conditions to minimize contaminant levels.
Inhalation: Move to fresh air and keep at rest. Seek medical attention if coughing or other symptoms persist. Rinse mouth if dust has been ingested.
Skin Contact: Wash with plenty of soap and water. Remove contaminated clothing. Seek medical attention if irritation develops.
Eye Contact: Flush with water for at least 15 minutes, keeping eyelids open. Remove contact lenses if present and easy to do. Seek medical help if redness or pain persists.
Ingestion: Rinse mouth with water. Do not induce vomiting. Seek medical attention for any discomfort.
Notes for Physicians: Treat symptomatically. No known specific antidotes for magnesium hypophosphite.
Suitable Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or foam.
Unsuitable Extinguishing Media: Avoid high-pressure water jets.
Special Hazards: Decomposition may produce toxic phosphorus oxides and phosphine gases. Fire may give off magnesium oxide fumes.
Protective Equipment for Firefighters: Firefighters should use self-contained breathing apparatus and full firefighting gear.
Advice: Clear area of unnecessary personnel. Cool containers exposed to flames with water spray.
Personal Precautions: Avoid generating dust. Use suitable protective equipment including gloves, goggles, and a dust mask.
Environmental Precautions: Prevent spillage from entering drains or waterways. Dike spillage if possible.
Methods for Clean-Up: Sweep or scoop up material into containers for disposal. Wash spill area with water after clean-up to remove any residues.
Disposal of Collected Material: Refer to local and national regulations for material disposal requirements.
Handling: Handle in a well-ventilated area. Minimize dust generation. Do not inhale dust. Avoid contact with skin and eyes. Ensure emergency eyewash stations are accessible.
Storage: Store in tightly sealed containers, out of direct sunlight and away from incompatible materials such as strong oxidizers and acids. Store in a dry, cool place with minimal humidity.
Incompatible Materials: Avoid storage near strong oxidizers, acids, or moisture.
Specific End Use(s): Industrial use only. Not intended for food, drug, or household applications.
Occupational Exposure Limits: No established exposure limits for magnesium hypophosphite; maintain dust levels below 10 mg/m³ (inhalable) as a general nuisance threshold.
Engineering Controls: Use local exhaust ventilation or process enclosures to control airborne dust.
Respiratory Protection: Use a NIOSH-approved dust mask or respirator if dust exposure is anticipated.
Hand Protection: Wear protective gloves made from nitrile, latex, or neoprene.
Eye Protection: Use safety goggles or a face shield to avoid contact.
Skin and Body Protection: Wear laboratory coats or protective clothing.
Hygiene Measures: Practice good industrial hygiene. Wash hands after handling and before eating or drinking.
Appearance: White crystalline powder
Odor: Odorless
Odor Threshold: Not applicable
pH: 5.0 – 7.0 (1% solution)
Melting Point: Decomposes before melting (no clear melting point)
Boiling Point: Not applicable (decomposes)
Flash Point: Not flammable
Evaporation Rate: Not applicable
Flammability: Not highly flammable
Explosive Limits: Not explosive under normal conditions
Vapor Pressure: Negligible at room temperature
Vapor Density: Not applicable
Solubility: Soluble in water
Partition Coefficient (n-octanol/water): Not determined
Auto-Ignition Temperature: Not self-igniting
Decomposition Temperature: Gradual decomposition above 200°C
Relative Density: 2.0 – 2.2 g/cm³
Bulk Density: Varies, ~0.7 – 1.1 g/cm³
Chemical Stability: Stable under recommended storage conditions. Prolonged exposure to moisture or extreme heat can cause decomposition.
Reactivity: Minimal reactivity at room temperature.
Hazardous Reactions: Decomposes with acids, releasing phosphine (toxic, flammable gas). May react with strong oxidizing agents.
Conditions to Avoid: Excess heat, moisture, contact with acids or oxidizers.
Incompatible Materials: Acids, oxidizing agents, moisture.
Hazardous Decomposition Products: Phosphine, phosphorus oxides, magnesium oxide.
Acute Toxicity: No data on LD₅₀ in humans; generally considered of low toxicity based on animal studies.
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion.
Skin Irritation: Mild skin irritant in contact with unprotected skin.
Eye Irritation: Dust may cause mechanical irritation.
Respiratory Sensitization: Dust inhalation may cause irritation or coughing.
Chronic Toxicity: Long-term effects unknown. Not listed as a carcinogen by OSHA, IARC, or NTP.
Mutagenicity: Not expected to be mutagenic.
Other Effects: No data indicating reproductive or developmental toxicity.
Ecotoxicity: No extensive studies available. Expected to have low toxicity to aquatic life under normal use and disposal practices, but excessive spillage can impact local waterways.
Persistence and Degradability: Inorganic salts; expected to persist in the environment.
Bioaccumulative Potential: Potential for bioaccumulation considered low due to high solubility in water and rapid dispersion.
Mobility in Soil: Soluble; may move through soil and reach groundwater more easily than less soluble compounds.
Other Adverse Effects: Excessive release into aquatic environments may disrupt local nutrient cycles.
Waste Disposal: Dispose of in accordance with all local, state, and federal regulations. Do not dispose of in regular trash, landfill or natural environments.
Container Disposal: Empty containers should be rinsed before recycling or disposal. Decontamination required to minimize potential for environmental release.
Special Precautions: Contact approved hazardous waste disposal services for guidance.
Recycling Approaches: Not typically recycled due to the specificity of industrial use.
UN Number: Not regulated as a hazardous material for transport.
UN Proper Shipping Name: Not classified under UN transport recommendations.
Transport Hazard Class: Non-hazardous
Packing Group: Not assigned
Marine Pollutant: No
Special Transport Precautions: Use adequately sealed containers to prevent dust emission or leaks. Follow general transport best practices to safeguard handlers.
OSHA Status: Not specifically regulated; treat as general chemical substance.
TSCA Status: Listed on the Toxic Substances Control Act inventory.
CERCLA / SARA Title III: Not listed as a hazardous substance, no Section 313 reporting required.
DSL/NDSL (Canada): Listed/Not Listed, depending on latest regulatory updates.
WHMIS Classification: Not controlled
Other International Regulations: Follow specific country or regional guidelines for chemical import, distribution, and disposal.
