---
product_id: 225540643
title: "1kg Tub ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3"
brand: "trustleaf"
price: "€ 48.19"
currency: EUR
in_stock: true
reviews_count: 8
category: "Trustleaf"
url: https://www.desertcart.gr/products/225540643-1kg-tub-aluminium-sulphate-17-iron-free-alum-al2-so4
store_origin: GR
region: Greece
---

# Iron-free, ideal for organic horticulture Powerful water purification agent 17% pure Aluminium Sulphate concentration 1kg Tub ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3

**Brand:** trustleaf
**Price:** € 48.19
**Availability:** ✅ In Stock

## Summary

> 🌈 Transform your garden and water with Trustleaf’s powerhouse alum!

## Quick Answers

- **What is this?** 1kg Tub ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3 by trustleaf
- **How much does it cost?** € 48.19 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/225540643-1kg-tub-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

- • **Trusted by Pros:** Top-ranked in garden supplies with 4.4-star reviews—join thousands who rely on Trustleaf.
- • **Crystal-clear Purity:** 17% Aluminium Sulphate ensures maximum effectiveness in water treatment and dyeing.
- • **Multi-tasking Marvel:** From water purification to textile mordanting and soil pH adjustment—one tub, endless uses.
- • **Eco-smart & Iron-free:** Perfect for organic gardening and hydrangea color transformation without iron contamination.
- • **Resealable Convenience:** Keeps your product fresh and ready, minimizing waste and maximizing value.

## Overview

Trustleaf 1kg Tub Aluminium Sulphate (17% pure, iron-free) is a versatile chemical used for water purification, textile dye mordanting, and soil pH adjustment to enhance hydrangea colors. Packaged in a resealable tub, it’s ideal for organic horticulture and paper-making, trusted by professionals and gardeners alike.

## 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.

Review: Blue hydrangeas! Yay! - Perfect! Nice re-sealable tub and now I have beautiful blue hydrangeas!
Review: value for money - does exactly what it says on the tin (as they say)

## Features

- Causes serious eye damage.
- 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 |
|---------------|-------|
| ASIN | B07P3W8JJ7 |
| Best Sellers Rank | 1,556 in Garden ( See Top 100 in Garden ) 4 in Water Garden & Pond Treatment |
| Brand | Trustleaf |
| Customer Reviews | 4.4 4.4 out of 5 stars (193) |
| Date First Available | 15 July 2014 |
| Item Weight | 1 kg |
| Material | Aluminium |
| Product Dimensions | 12 x 12 x 15 cm; 1 kg |

## Product Details

- **Brand:** Trustleaf
- **Item form:** Powder
- **Item weight:** 1000 Grams
- **Manufacturer:** Trustleaf

## Images

![1kg Tub ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3 - Image 1](https://m.media-amazon.com/images/I/41tviv47gwL.jpg)

## Questions & Answers

**Q: At what concentration do you use this for maintaining blue hydrangea colour?**
A: Hi dose is 50g per metre applied (normally in solution) three times, two weeks apart,  May / June

## Customer Reviews

### ⭐⭐⭐⭐⭐ Blue hydrangeas! Yay!
*by M***E on 30 December 2025*

Perfect! Nice re-sealable tub and now I have beautiful blue hydrangeas!

### ⭐⭐⭐⭐⭐ value for money
*by R***Y on 14 July 2025*

does exactly what it says on the tin (as they say)

### ⭐⭐⭐⭐ Best value for blue hydrangeas
*by B***W on 17 August 2024*

Well packaged and quick delivery. Will have to wait until next year to see how it works.

## Frequently Bought Together

- Trustleaf 1kg Tub ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3
- Intralabs - Sodium Carbonate Light Fine Powder 1kg - Soda Ash Light

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**Shop now:** [https://www.desertcart.gr/products/225540643-1kg-tub-aluminium-sulphate-17-iron-free-alum-al2-so4](https://www.desertcart.gr/products/225540643-1kg-tub-aluminium-sulphate-17-iron-free-alum-al2-so4)

---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-13*