Physical and Chemical Composition:
Typical percentages of high-quality aluminium sulphate flakes are 16-17% Al₂O₃ with low levels of iron and insolubles. It is made by reacting aluminum-containing raw materials with sulfuric acid.
Main Features And Uses
● A powerful coagulant for the clarification of water and removal of turbidity.
● Used in both potable and industrial wastewaters.
● Helps to remove suspended solids, color, and certain heavy metals.
● Assists with sizing and dye fixatives in the production of paper and textiles.
● Only used in selected food-grade and cosmetic-grade processes.
Application In Various Industries
1. Water treatment
● Primary use as flocculant/coagulant.
● Clarifies river, lake, tap.
● Reduces suspended solids and turbidity.
● Reduces industrial & city wastewater.
2. Paper Industry
● Used for sizing paper and surface coatings.
● Reduces/assists with sizing paper.
● Increases absorption & strength of inks.
3. Textile Industry
● Serves as a mordant during dyeing.
● Used to fix dyes.
● Improves color fastness.
4. Leather Industry
● Used for tanning and finishing of leather goods.
● Used in vegetable tanning.
● Used in some drum-tanning processes.
5. Environmental/Agriculture
● Used for environmental and small-scale agriculture.
● Used to adjust soil pH.
● Used to treat small-scale wastewater/ponds.
● Used as a component in multiple fire retardants and waterproofing
additives.
Checklist of Quality for Aluminum Sulfate Flakes
The following items need to be verified when checking quality:
● Al₂O₃ content: 16% to 17% minimum.
● Iron content (Fe): Less than or equal to 0.005% (for higher grades).
● Insoluble matter: Less than or equal to 0.1% to 0.15%.
● pH (1% solution): Approximately 2.5 to 3.5.
● Appearance: Free-flowing flakes, white/colorless, no strong discoloration.
Before purchasing aluminum sulfate flakes in bulk, ask the supplier for a certificate of analysis (COA) and a material safety data sheet (MSDS).
Top Manufacturers in the World
There are several leading companies in the world:
● Hengyang Jianheng Industry Development Co., Ltd (China)
● Kemira Oyj (Finland)
● BASF SE (Germany)
● Gulbrandsen Chemicals, Inc. (United States)
● Aditya Birla Chemicals (India)
● General Chemical Industrial Products, Inc. (United States)
● Tanfac Industries Limited (India)
● GEO Specialty Chemicals, Inc. (United States)
● Chemtrade Logistics Income Fund (Canada)
● Nippon Light Metal Holdings Co., Ltd. (Japan)
Where to Buy Aluminum Sulfate Flakes in Pakistan?
Chemical markets and industrial suppliers in all major cities sell aluminum sulfate flakes.
● Lahore – Shah Alam Market and industrial chemical suppliers.
● Karachi – Industrial chemical traders and water‑treatment suppliers.
● Faisalabad – Textile and chemical‑raw‑material suppliers.
● Other cities – Multan, Gujranwala, etc., via local chemical markets.
Packing typically consists of 25 kg or 50 kg HDPE-lined bags.
Price Overview – 2026
● China’s bulk export estimate: ~USD 120 to 220 (per metric ton) for industrial-grade flake (range: 16 to 17% Al₂O₃).
● Pakistan Local Market: The same type of industrial-grade flake is ~PKR 80 to 140 / kg (depends on purity, packaging, and source).
● Higher grade (food/drink) or imported flake may cost more in Pakistan.
For pricing comparisons, request up-to-date quotes from 2-3 suppliers and verify the Al₂O₃ % and COA information before making your decision. Tianjin Unilion can help buyers with sourcing, logistics, and customs clearance for industrial chemicals like aluminum sulfate.
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