Aluminum sulfate octadecahydrate
Aluminum sulfate octadecahydrate (CAS: 7784-31-8), with the chemical formula Al2(SO4)3 · 18H2O, is a hydrated inorganic salt. This compound, presenting as a white crystalline solid, is primarily recognised for its applications in water treatment as a flocculant and in papermaking to improve sizing. Its properties also lend it to use in catalyst preparation and as a mordant in dyeing processes. Tech Serve Solutions supplies this ACS reagent grade chemical for laboratory and industrial needs.
Water Treatment
Aluminum sulfate octadecahydrate acts as a coagulant and flocculant in municipal and industrial water treatment. It aids in the removal of suspended solids, impurities, and colour from raw water, contributing to clearer and safer water.
Papermaking
In the paper industry, this compound is used as a sizing agent. It helps to improve the water resistance of paper and reduces ink feathering, enhancing the quality and printability of paper products.
Dyeing and Mordanting
As a mordant, aluminum sulfate octadecahydrate is employed in the textile industry to help fix dyes to fabrics. It forms insoluble complexes with dyes, improving colour fastness and vibrancy on various materials.
Chemical Synthesis
This chemical serves as a versatile reagent in various chemical synthesis pathways. It is a source of aluminum ions and sulfate, useful in the preparation of other aluminum compounds and catalysts.
| Molecular weight | 666.43 |
|---|---|
| Linear formula | Al2(SO4)3 · 18H2O |
| Assay | ≥98%98.0-102.0% (ACS specification) |
| Grade | ACS reagent |
| Impurities tested | ≤0.01% insolubles |
Hazard statements
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 41 |
| Safety statements (S) | 26-39 |
| Cation traces | Ca: 0.01%Fe: ≤0.002%K: 0.005%Mg: 0.002%Na: 0.02%heavy metals (as Pb): ≤0.001% |
| Anion traces | chloride (Cl-): ≤0.005% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Aluminum sulfate octadecahydrate used for?
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Aluminum sulfate octadecahydrate is primarily used in water treatment as a flocculant, in papermaking as a sizing agent, and as a mordant in dyeing. It also finds applications in chemical synthesis and catalyst preparation.
What are the CAS number and chemical formula for Aluminum sulfate octadecahydrate?
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The CAS number for Aluminum sulfate octadecahydrate is 7784-31-8, and its chemical formula is Al2(SO4)3 · 18H2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Aluminum sulfate octadecahydrate in ACS reagent grade, with an assay of ≥98% (98.0-102.0% per ACS specification) and ≤0.01% insolubles.
What are the main safety hazards associated with Aluminum sulfate octadecahydrate?
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Aluminum sulfate octadecahydrate is classified as Danger, with the hazard statement H318 (Causes serious eye damage). Appropriate personal protective equipment, including eyeshields, gloves, and a dust mask (type N95), should be worn when handling.
How is Aluminum sulfate octadecahydrate packed, shipped, and exported?
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This product is shipped according to UN 3077 (Class 9, Packing Group III) regulations. Specific packaging details for export can be provided upon request.
How can I request a sample or quote for Aluminum sulfate octadecahydrate?
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To request a sample or a quote for Aluminum sulfate octadecahydrate, please contact our sales team through the website or by phone.
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