---
product_id: 476622023
title: "2kg bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3"
brand: "trustleaf"
price: "฿4266"
currency: THB
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.th/products/476622023-2kg-bag-aluminium-sulphate-17-iron-free-alum-al2-so4
store_origin: TH
region: Thailand
---

# Iron-free formula ideal for organic horticulture Compact 2kg bag for precise application 17% pure Aluminium Sulphate concentration 2kg bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3

**Brand:** trustleaf
**Price:** ฿4266
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your craft with pure, iron-free aluminium sulphate!

## Quick Answers

- **What is this?** 2kg bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3 by trustleaf
- **How much does it cost?** ฿4266 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/476622023-2kg-bag-aluminium-sulphate-17-iron-free-alum-al2-so4)

## Best For

- trustleaf enthusiasts

## Why This Product

- Trusted trustleaf brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Crystal Clear Performance:** Premium crystalline form ensures consistent purity and effectiveness.
- • **Iron-Free for Pure Results:** Eliminates iron contamination, perfect for sensitive dyeing and water purification tasks.
- • **Versatile Application Power:** From water purification to paper-making and soil pH adjustment—one product, endless uses.
- • **Organic Agriculture Approved:** Safe and effective for enhancing plant health and vibrant hydrangea colors naturally.
- • **Compact & Convenient Packaging:** 2kg bag designed for easy storage and precise dosing, minimizing waste.

## Overview

Trustleaf’s 2kg Aluminium Sulphate bag delivers 17% pure, iron-free alum in crystalline form, optimized for professional use in dyeing, water purification, organic horticulture, and paper-making. Its iron-free formula ensures clean, reliable results, while its ability to adjust soil pH makes it a must-have for vibrant hydrangea cultivation and sustainable agriculture.

## Description

Aluminium sulphate is used in water purification and as a mordant in dyeing and printing textiles. In water purification, it causes impurities to coagulate which are removed as the particulate settles to the bottom of the container or more easily filtered. When dissolved in a large amount of neutral or slightly alkaline water, aluminium sulfate produces a gelatinous precipitate of aluminium hydroxide, Al(OH)3. In dyeing and printing cloth, the gelatinous precipitate helps the dye to adhere to the clothing fibres by rendering the pigment insoluble. Can change the colour of hydrangeas by reducing the PH value of soil.

## Features

- Aluminium Sulphate in Crystaline form
- Iron Free - suitable for use as a dye, mordant, water purifier and jar sterilizer and in paper-making
- Can reduce soil PH to change Hydrangea's colour
- Suitable for use in Organic Agriculture / Horticulture
- Sometimes called Alum or Papermakers Alum.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Trustleaf |
| Product Dimensions | 20 x 30 x 3.5 cm; 2.04 kg |
| Material | Aluminium |
| Item Weight | 2.04 kg |

## Product Details

- **Brand:** Trustleaf
- **Package information:** Bag
- **Item form:** Powder
- **Manufacturer:** Trustleaf

## Images

![2kg bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3 - Image 1](https://m.media-amazon.com/images/I/51YBQ4NSDlL.jpg)
![2kg bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3 - Image 2](https://m.media-amazon.com/images/I/91hfm+O5SRL.jpg)

## Available Options

This product comes in different **Size Name** options.

## Questions & Answers

**Q: How do you use for dyeing? Thought it might of came with instructions**
A: I used this method to prepare cotton fabric for marbling ;
Prepare Your Fabric (The Day Before)
Mix 2 tablespoons of alum into two gallons of water. (The ratio of alum to water is 1:1.)
Place all the fabric you're planning on marbling in the solution for 20 minutes. (Don't leave it any longer or it can ruin the fabric.)
After 20 minutes remove the fabric from the water.

I did all this outside, in case of strong odours, and hung the fabric to dry on the outside line.
Hope this helps!

**Q: How much would I need to use in a 2m x 0.50m planter to change the Ph which is 6-7 reading. Thank you.**
A: I have never done this but suggest you Google 'what is aluminum sulphate used for in horticulture'. There is quite a lot of info out there.

**Q: Does this contain potassium or not?**
A: No - This product is Aluminium Sulphate Al203 alternatively know as Al2(SO4)3 - It is a Sulphate and does not contain Potassium.

**Q: Can i make crystals with this**
A: Hi, Yes you can make crystals with this!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect!
*by C***S on 3 April 2025*

Does what it was intended for, as a mordant. Worked perfectly.

### ⭐⭐⭐⭐⭐ Useful powder to use
*by J***N on 14 June 2024*

I used this as part of a flower pounding project. It is a white powder that you mix with water and soak material in. Once dried this acts as a mordant on the material for the flower dyes and preserves the colours. Easy to use and I didn’t find it affected my skin at all though I was more careful to keep away from my eyes.

### ⭐⭐⭐⭐ For keeping hydrangeas blue
*by K***Y on 30 December 2024*

I think as long as you start to use this in September (early) it will keep your hydrangeas blue throughout their growing season. It’s a pain to make up each time but a teaspoon in a 2L bottle is usually enough to hydrate the plant and maintain its colour.

## Frequently Bought Together

- 2kg bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3
- Jacquard Soda Ash Dye Fixer, Tie-Dye Fabric Colour Fixative and Activator, 1 lb, Improves Colour Retention, Ideal for Cotton and Natural Fibers, Easy to Use

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-29*