---
product_id: 118194823
title: "250g bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3"
brand: "trustleaf"
price: "R300"
currency: ZAR
in_stock: true
url: https://www.desertcart.co.za/products/118194823-250g-bag-aluminium-sulphate-17-iron-free-alum-al2-so4
store_origin: ZA
region: South Africa
---

# Organic-agriculture safe & iron-free Compact 250g bag, easy storage 17% pure aluminium sulphate concentration 250g bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3

**Brand:** trustleaf
**Price:** R300
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your craft and garden game with pure, versatile alum power!

## Quick Answers

- **What is this?** 250g bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3 by trustleaf
- **How much does it cost?** R300 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/118194823-250g-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

- • **Organic Friendly:** Certified safe for organic agriculture and horticulture use
- • **Precision Purity:** 17% iron-free aluminium sulphate for consistent, reliable results
- • **Compact & Convenient:** 250g crystalline bag designed for easy handling and storage
- • **Hydrangea Hue Control:** Easily tweak soil pH to transform your garden’s hydrangea colors
- • **Versatile Application:** Perfect for dyeing, water purification, paper-making, and soil pH adjustment

## Overview

Trustleaf’s 250g Aluminium Sulphate bag delivers 17% iron-free alum in crystalline form, ideal for professional dyeing, water purification, paper-making, and organic horticulture. Its unique ability to adjust soil pH makes it a must-have for gardeners aiming to customize hydrangea colors, all while supporting eco-friendly practices.

## 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 | 12.5 x 22 x 1 cm; 250 g |
| Material | Aluminium |
| Item Weight | 250 g |

## Product Details

- **Brand:** Trustleaf
- **Molecular weight:** 192.13
- **Package information:** Bag
- **Item form:** Powder
- **Manufacturer:** Trustleaf

## Images

![250g bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3 - Image 1](https://m.media-amazon.com/images/I/512JZWOPyEL.jpg)

## Available Options

This product comes in different **Size** 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!

## Frequently Bought Together

- 250g 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.za/products/118194823-250g-bag-aluminium-sulphate-17-iron-free-alum-al2-so4](https://www.desertcart.co.za/products/118194823-250g-bag-aluminium-sulphate-17-iron-free-alum-al2-so4)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-23*