Zibo Dingqi Chemicals Co., Ltd. is one of the most experienced manufacturers and suppliers of aluminum sulfate octadecahydrate in China. Welcome to wholesale high quality aluminum sulfate octadecahydrate made in China here from our factory. For price consultation, contact us.
Product Overview
Aluminum sulfate octadecahydrate is an inorganic aluminum salt supplied as a defined hydrate form with the chemical formula Al2(SO4)3 · 18H2O and CAS Number 7784-31-8. It serves as a consistent chemical raw material for industrial manufacturing, municipal water treatment, and chemical synthesis formulations requiring a specific molecular composition and predictable dissolution behavior.
Comprehensive Technical Specifications Table
|
Technical Parameter |
Specification Range / Standard |
Test Method / Reference |
|
Active Aluminum Component |
Al2O3: 15.6% min |
EDTA Titrimetric Method |
|
Iron Impurity Threshold |
Fe: 0.008% max |
Atomic Absorption Spectrophotometry |
|
Water Insoluble Matter |
Insoluble: 0.1% max |
Gravimetric Analysis |
|
Acidity Level |
pH (5% Solution): 3.0 to 4.0 |
Glass Electrode pH Meter |
|
Physical Appearance |
White to Off-White Crystalline Flakes / Granules |
Visual Inspection |
|
Bulk Density |
0.90 to 1.10 g/cm3 |
Standard Volumetric Measurement |
Core Product Advantages
Optimized Stoichiometric Purity: Produced through tightly monitored crystallization parameters to deliver a predictable and consistent active aluminum ratio per metric ton.
Enhanced Dissolution Kinetics: The multi-hydrate crystalline lattice accelerates wetting and dispersion rates in automated water treatment dosing systems.
Strict Transition Metal Control: Low baseline iron and heavy metal concentrations prevent undesirable side reactions in sensitive catalytic and papermaking processes.
Dust-Minimized Granulation: Processed to reduce fine particulate generation during handling, improving workplace safety and minimizing material loss.
Industrial Applications
Water Treatment: Deploys effectively as a primary coagulant in municipal and industrial wastewater treatment plants to neutralize surface charges, destabilize colloidal suspensions, and aid in phosphorus precipitation.
Pulp & Paper Industry: Utilized in sizing processes to improve paper sheet formation, retention, and printability.
Chemical Synthesis: Acts as an active aluminum source for the formulation of specialty catalysts, zeolites, and other inorganic aluminum compounds.
Manufacturing Process & Quality Control
Our production facility utilizes controlled reaction processes combining refined aluminum-bearing feedstock with high-purity sulfuric acid under strict stoichiometric monitoring.
Raw Material Screening: Incoming materials undergo analytical verification for heavy metals and reactive impurities prior to batch release.
Crystallization & Thermal Management: Precise temperature control during crystallization ensures the stable formation of the octadecahydrate structure, preventing partial dehydration or caking during storage.
Batch Testing: Every production lot is sampled and tested in our internal laboratory using standardized titration and atomic absorption spectroscopy to verify aluminum oxide content, iron limits, and pH stability.
Documentation Support: Each commercial shipment is accompanied by a Certificate of Analysis and a Safety Data Sheet.
Alternative Grading & Customization Options
Granular Size Options: Availability of powdered, fine granular, or flake forms tailored to specific dissolving equipment or dry-feeder systems at client facilities.
Custom Packaging & Labeling: Private labeling services, customized net weight printing, and pallet fumigation certificates to meet local import port regulations.
Tailored Purity Levels: Custom iron-reduced grades designed specifically for high-purity papermaking or precision industrial catalyst synthesis where trace transition metals impact performance.
Packaging, Storage & Handling
Standard Packaging Options: Available in 25 kg woven polypropylene bags with inner polyethylene liners, moisture-resistant jumbo bags (1000 kg to 1200 kg), and customizable pallet configurations wrapped with stretch film to prevent moisture ingress during transit.
Storage Recommendations: Store in a cool, dry, well-ventilated area away from alkaline substances and moisture. Keep containers tightly sealed to maintain product integrity and prevent clumping.
FAQ
Q: What is the shelf life of aluminum sulfate octadecahydrate under standard storage conditions?
A: When stored in tightly sealed containers in a cool, dry, and well-ventilated warehouse, the product maintains its chemical stability for up to 12 months. Prolonged exposure to high humidity may cause surface caking.
Q: How does the octadecahydrate form differ from anhydrous or lower hydrate grades in terms of dissolution?
A: The higher water of crystallization content in the octadecahydrate form generally results in faster initial dissolution rates in aqueous systems compared to anhydrous or lower hydrate variations, though active aluminum oxide concentration must be factored into the dosing calculations.
Q: Can technical support be provided for industrial process optimization or coagulant jar testing?
A: Yes, our technical team provides baseline dosing guidelines, compatibility insights, and trial recommendations to assist engineering teams in optimizing coagulation or chemical synthesis efficiency.
Q: What is the standard procedure for handling spills or accidental exposure?
A: In case of a dry spill, sweep up material carefully while avoiding dust generation and place into a sealed container for disposal. Flush residual traces with plenty of water in accordance with local environmental regulations and safety data sheet guidelines.
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