Product Overview
Aluminum Sulfate Hydrate ACS Grade is a white crystalline salt used across water treatment, paper manufacturing, textile processing, and analytical chemistry. ACS Grade designation means the material meets American Chemical Society reagent specifications — the purity standard required for quantitative analytical work, QC testing, and any process where reproducibility depends on known composition.
we distribute this product in our Taylor, TX warehouse and ship it daily. Pack sizes run from 2 lb jars for bench work up to 50 lb bags for production-scale dosing. Every unit ships with full safety documentation.
Why This Grade
ACS Grade exists for one reason: traceable purity. If your process demands a certificate of analysis with lot-specific assay data, or if your method references an ACS-grade reagent, a technical or industrial grade will not satisfy the requirement. Water treatment plants running jar tests to calibrate coagulant dosing, paper mills optimizing sizing chemistry, and QC labs preparing standard solutions all need a grade they can trust without re-assaying in-house.
For high-volume industrial coagulation where ACS Grade designation is not required — municipal floc dosing at hundreds of pounds per day, for example — a technical grade aluminum sulfate would reduce cost per pound. But anywhere the result has to be defensible or the method specifies ACS reagent chemicals, this is the correct product.
Chemical Profile
Aluminum Sulfate Hydrate ACS Grade is a white, odorless crystalline solid with the molecular formula Al₂H₃₆O₃₀S₃ and a molecular weight of 666.4 g/mol (CAS 7784-31-8). It is soluble in water, which makes it straightforward to prepare solutions at working concentrations. The crystal density is approximately 1.62 g/cm³, though bulk density runs lower at roughly 0.96 g/cm³ — a distinction that matters when sizing hoppers and calculating volumetric feed rates. The solid form is stable under normal storage conditions and does not generate significant vapor pressure at ambient temperature.
Industrial Applications
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Water Treatment & Coagulation — Aluminum sulfate is one of the most widely used coagulants in potable and wastewater treatment. Dissolved in water, it hydrolyzes to form aluminum hydroxide floc, which sweeps suspended solids, colloidal particles, and dissolved organics out of solution. Operators dose it upstream of settling basins or clarifiers. ACS Grade is particularly relevant for jar testing and bench-scale optimization, where accurate dosing depends on known purity.
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Paper Manufacturing — In the pulp and paper industry, aluminum sulfate acts as a sizing agent. It reacts with rosin size to anchor the sizing compound to cellulose fibers, controlling ink penetration and improving sheet surface properties. Precise chemistry matters here — off-spec alum changes pH behavior and sizing efficiency.
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Textile Dyeing — Aluminum sulfate serves as a mordant, bonding dye molecules to fabric fibers so color holds through washing and wear. The ACS grade is used when color consistency across production lots is critical and the mordant chemistry must be reproducible.
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Food Processing — Used as a firming agent in pickling and canning operations, where it helps maintain the texture of fruits and vegetables during thermal processing.
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Laboratory Reagent — ACS Grade aluminum sulfate is a standard shelf reagent in analytical and preparative chemistry. Common uses include preparing aluminum hydroxide precipitates, standardizing coagulation methods, and serving as a controlled aluminum ion source in research protocols.
Handling & Storage
Aluminum sulfate hydrate carries a Danger signal word (per the product's GHS classification). The three key hazard statements:
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H290 — May be corrosive to metals. Store away from bare steel, iron, and aluminum surfaces. Use HDPE, glass, or lined containers.
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H318 — Causes serious eye damage. This is the primary personnel hazard. Splash goggles (not safety glasses) are mandatory when handling powder or solutions. A face shield is warranted during bulk transfers.
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H412 — Harmful to aquatic life with long-lasting effects. Contain rinse water and spills; do not discharge solutions directly to storm drains or surface water without treatment.
Store in a cool, dry area with containers tightly sealed. The hydrate will absorb additional moisture from humid air, which can cause caking and alter the effective concentration when dissolved. Keep away from strong acids and strong bases to avoid unwanted reactions. HDPE and glass containers are both compatible. Wear chemical-resistant gloves and dust protection when scooping or transferring dry product.
Shipping
Aluminum Sulfate Hydrate is not classified as a DOT-regulated hazardous material for transport. It ships without a UN number, hazard class, or packing group requirement. This simplifies logistics — no placarding, hazmat surcharges may apply, and no special carrier certification required for ground shipment. We pack it in sealed containers appropriate to the order size and ship daily from our Taylor, TX facility via standard ground freight or parcel carriers.
Documentation
A Safety Data Sheet ships with every order. SDS documents are available in English, Spanish, French, and Japanese. A lot-specific Certificate of Analysis is available on request, providing assay and impurity data tied to the specific production lot you receive. A Technical Data Sheet is also available for specification reference.
Why Buy from Alliance Chemical
We are a working chemical distributor — we receive, warehouse, repackage, and ship this product from our facility in Taylor, TX. Orders ships under the stated handling schedule. Our shipping and handling guidance is reviewed by Andre Taki, DOT Hazmat Specialist, so packaging and labeling meet regulatory requirements before the shipment leaves our dock. When you need documentation, tech support on pack sizes, or help matching a grade to your application, you are talking to people who handle these products daily — not a marketplace middleman.
