

Aluminium Sulphate 17% Powder Water Treatment Flocculant Clarifier 500g
Aluminium Sulphate 17% Powder is a widely used coagulating agent designed to help clarify water by gathering fine suspended particles into larger “flocs,” making them easier to settle or filter out. This makes it suitable for process water clarification, turbidity reduction trials, filtration support, and lab or workshop demonstrations where accurate dosing is essential.
This listing is for 500g supplied by HD Chemicals LTD in a strong HDPE bottle, ideal for customers who want tougher, reusable packaging with easier pouring and resealing. HDPE packaging helps protect the powder from moisture exposure during storage and handling, reducing the chance of clumping and improving convenience for repeated dosing. When dissolved, aluminium sulphate solutions can be acidic, so handle with care, avoid dust, and always add powder to water while stirring. Store tightly closed in a cool, dry place.
Aluminium Sulphate powder strength marked 17% (common industry specification)
Helps clarify water via coagulation and flocculation
Supports faster settling of suspended solids
Improves filtration efficiency in many setups
500g size for routine use and repeat treatments
Strong HDPE bottle for secure storage and easy resealing
Easier to pour/measure compared with bags
Hygroscopic powder—closed bottle helps reduce moisture uptake
Suitable for process, hobby, and lab applications
Accurate metric dosing (grams/millilitres) made simple
Safety first: Wear gloves and eye protection. Avoid breathing dust. Use in a ventilated area. Solutions may be acidic. Always follow local rules for treatment and disposal.
Jar test to find the best dose (recommended)
Add 1.0 L cloudy water to a jar
Make stock: dissolve 1.0 g in 100 mL water
Dose 1–10 mL (equals 0.01–0.10 g/L)
Stir fast 30 sec, slow 2–3 min, settle 15–30 min
Routine clarification in non-potable process tanks
For 100 L water start with 5 g (0.05 g/L)
Mix 5–10 minutes, settle 30–60 minutes
Decant/filter clear layer; remove settled sludge
Pre-filter dosing to support filtration (non-drinking)
Make dosing solution: 10 g in 1 L water (1%)
Add upstream in small steps while mixing
If haze occurs, reduce dose and repeat test
Turbidity reduction in stored water (non-potable)
Dose 0.02–0.10 g/L depending on cloudiness
Mix well; allow extended settling
Clean out settled solids after treatment
Color and fine particle reduction trials
Use jar test method
Increase dose by 0.02 g/L increments
Stop at best clarity point (avoid overdosing)
Workshop/lab coagulation demonstration
Dose beakers at 0.01–0.05 g/L
Compare mixing speeds and settling performance
Record the best dose for repeatability
Sludge thickening trials
Dose 0.05–0.15 g/L
Mix gently; allow settling
Measure sludge volume change and adjust
Small batch maintenance dosing
Weigh in grams using a metric scale
Prepare fresh solution each session
Keep bottle closed between uses
Clarification trials for water features (where permitted)
Test on 10–20 L first at 0.02–0.05 g/L
Monitor pH and clarity
Avoid sensitive systems without experience
General suspended solids reduction support
Start low (0.02 g/L) and increase gradually
Mix thoroughly; allow settling
Keep notes for consistent dosing
Brand: HD Chemicals LTD
Weight: 500g
Grade: Technical
Form: Powder
Packaging: Strong HDPE bottle (re-sealable)
Technical Data
Chemical name: Aluminium Sulphate / Aluminum Sulfate
Typical appearance: White/off-white powder or crystalline solid
Water solubility: Soluble
Solution nature: Acidic when dissolved
CAS (commonly used reference): 10043-01-3 (hydrated forms may be listed differently)
Molecular formula (reference): Al₂(SO₄)₃ (hydration state may vary)
Aluminum Sulfate 17% Powder 500g, Aluminium Sulphate Powder, Alum Powder, Filter Alum, Water Treatment Coagulant, Water Clarifier Powder, Flocculant Powder, Turbidity Remover, Coagulation Agent, Process Water Clarifier, HDPE Bottle Chemical
Q1: What does “17%” mean?
A: It’s a common strength marking used in industry for aluminium sulphate products (often linked to aluminium oxide equivalent in specifications).
Q2: Why HDPE bottle packaging?
A: It’s tough, resealable, easier to pour, and helps reduce moisture exposure during storage.
Q3: What’s a good starting dose?
A: For trials, start around 0.01–0.10 g/L and adjust using jar tests.
Q4: Does it affect pH?
A: Yes, it can lower pH because solutions are typically acidic.
Q5: How do I make a dosing solution?
A: Dissolve 10 g in 1 L water (1%), then dose in millilitres.
Q6: Can it clump in storage?
A: Yes—keep the bottle tightly closed and store cool and dry to reduce clumping.
Q7: What PPE should I use?
A: Gloves and eye protection minimum; avoid inhaling dust; wash after handling.
Q8: Is it suitable for drinking water?
A: Only if used by qualified operators under approved processes and local regulations.
Q9: What happens if I overdose?
A: It can cause haze or reduced clarity—reduce dose and re-test.
Q10: How should I store it?
A: Keep tightly closed, cool and dry; reseal immediately after each use.