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Magnesium hydroxide CAS#1309-42-8

  • Magnesium hydroxide CAS#1309-42-8
  • Magnesium hydroxide CAS#1309-42-8
  • Magnesium hydroxide CAS#1309-42-8
  • Magnesium hydroxide CAS#1309-42-8
  • Magnesium hydroxide CAS#1309-42-8

Magnesium hydroxide CAS#1309-42-8

Long-Lasting Antacid & Laxative Action：Reacts slowly with stomach acid and retains water in the intestine, providing sustained relief from acidity and constipation.


Effective Flame Retardant & Smoke Suppressant：Decomposes endothermically at 332 °C, releasing water and magnesia to reduce heat and suppress smoke in fire-resistant applications.


Versatile Industrial Applications：Widely used in wastewater treatment, fuel additives, and as a raw material for producing various magnesium salts.


Stable Aqueous Suspension：Forms a uniform suspension in water with controlled solubility, ensuring reliable performance in pharmaceutical and industrial formulations.



Phone ：+86 18626059817
WhatsApp ：+86 18626059817
Email ：cora@wxqysteel.com
product description

Product Description of ‌Magnesium hydroxide CAS#1309-42-8

As the main component of Milk of Magnesia, magnesium hydroxide acts as a long-acting antacid and laxative. It also functions as an effective flame retardant and smoke suppressant, decomposing endothermically at 332 °C. Additionally, it is applied in wastewater treatment, fuel additives, and magnesium salt manufacturing.


Product Application of Magnesium hydroxide CAS#1309-42-8

Magnesium hydroxide is a high-performance flame retardant for plastics, rubber and coatings. It is widely used in flue gas desulfurization and acidic wastewater treatment as a replacement for caustic soda and lime. It also serves pharmaceuticals, food processing, electronics and chemical raw material production. Owing to its higher decomposition temperature, it is ideal for high-temperature processing of common polymers and flame-retardant paints.

Product Information

Parameters


Melting point350 °C (lit.)
density2,36 g/cm3
storage temp.Room Temperature
solubility5 M HCl: 0.1 M, clear, yellow
formpowder
colorWhite
Specific Gravity2.36
OdorOdorless
PH10.4(1 mM solution);10.4(10 mM solution);10.4(100 mM solution)
PH Range9.5 - 10.5
Water Solubility0.9 mg/100 mL (18 ºC)
λmaxλ: 260 nm Amax: 0.030
λ: 280 nm Amax: 0.025
SensitiveAir Sensitive
Merck145,670
Solubility Product Constant (Ksp)pKsp: 11.25
Stability:Stable.
Cosmetics Ingredients FunctionsABSORBENT
BUFFERING
InChIKeyVTHJTEIRLNZDEV-UHFFFAOYSA-L
LogP-1.380 (est)
CAS DataBase Reference1309-42-8(CAS DataBase Reference)
NIST Chemistry ReferenceMagnesium hydroxide(1309-42-8)
EPA Substance Registry SystemMagnesium hydroxide (Mg(OH)2) (1309-42-8)


Safety Information


Hazard CodesXi
Risk Statements36/37/38
Safety Statements26-36-37/39-24/25
WGK Germany-
RTECSOM3570000
TSCAYes
HS Code28161000
Hazardous Substances Data1309-42-8(Hazardous Substances Data)
ToxicityLD50 oral in rat: 8500mg/kg


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We are a supply chain service provider rather than a single manufacturer. Instead of being tied to one specific factory, we have established deep partnerships with numerous high-quality domestic chemical enterprises that hold certifications such as ISO and REACH. This allows us to flexibly match the most suitable supply sources to your needs while independently conducting third-party quality inspections to ensure delivery quality and price competitiveness.
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We maintain transit warehouses with standing inventory in Southeast Asia, the Middle East, and Eastern Europe.
For you: You can pick up goods directly from local warehouses without the need for full-container orders; delivery times are reduced from the standard 30–45 days to just 3–5 days.
Reduced inventory pressure: You can purchase small batches for trial and quality verification before scaling up orders, avoiding the need to tie up large amounts of capital upfront.
Emergency restocking: If your production line faces a sudden material shortage, we can urgently dispatch supplies from our regional warehouses to prevent production downtime.
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For standard products, the MOQ is typically one 20-foot container (approx. 16–20 tons) for direct shipments from China. However, for stock picked up from overseas warehouses, we support orders starting from 1 ton—ideal for sample testing or small-batch production. Specific MOQs depend on the product category and packaging type; please contact us for details.
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We implement a "three-level quality control" system:
Before leaving the factory: We require the factory to provide a Certificate of Analysis (COA) for the specific batch.
Before shipment: We commission international third-party agencies like SGS or Intertek to conduct random inspections, with costs covered by us (for long-term partners).
After arrival: If quality issues arise, we commit to unconditional negotiation regarding returns, exchanges, or compensation, and we assume full responsibility. All terms are stipulated in the contract.
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FOB (China Port): Goods are prepared and shipped within 7–15 working days after the contract is signed and the prepayment is received.
Overseas Warehouse Stock: Items are dispatched within 1–3 working days of order confirmation and payment; local delivery typically takes 2–5 days (depending on the country).
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Which trade terms do you offer? Do you support DDP (Delivered Duty Paid)?

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We are proficient in handling common terms such as FOB, CIF, CFR, and EXW. Additionally, for regions covered by our overseas warehouses, we offer DDP services (including duties and door-to-door delivery), allowing you to receive goods without the hassle of complex import customs clearance procedures. Please consult your sales manager for specific costs.
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How can I obtain samples? What are the costs?

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If stock is available at an overseas warehouse, we can provide 1–2 kg of samples for free; you only need to cover the local courier fees.
If shipping from China, we can arrange delivery via DHL or FedEx; samples are free, but you bear the international shipping costs. Once a clear intent to cooperate is established, these shipping costs can be deducted from your first order.
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We offer a price protection mechanism:
For fixed-price contracts, we do not unilaterally raise prices due to market increases.
If you anticipate a market downturn, we can negotiate floating pricing—settling based on a benchmark price on the date of shipment or arrival—to flexibly manage fluctuations.
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What does your after-sales service include?

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We provide full-lifecycle service:
Usage Guidance: Assistance with adjusting processing parameters (if required).
Complaint Handling: Response within 48 hours and a solution provided within 7 days.
Regular follow-ups: Proactive contact every six months to understand changing needs and optimize supply solutions.
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