Sulphamic Acid: Applications, Usage Rates
Sulphamic acid, also known as amidosulfonic acid, is a powerful yet relatively safe chemical used in a variety of cleaning, descaling, and industrial applications. Available as a white crystalline powder, it is widely recognised for its effectiveness in removing limescale, mineral deposits, and rust, all while being less corrosive than other strong acids.
If you're searching for a versatile descaling and cleaning solution, sulphamic acid is a dependable choice. And for those looking to buy sulphamic acid UK online, HD Chemicals LTD provides high-purity options delivered quickly across the UK.
What is Sulphamic Acid?
Sulphamic acid (H₃NSO₃) is a stable, odourless solid acid that dissolves easily in water. Unlike many acidic substances, it is non-volatile and non-hygroscopic, making it ideal for household, commercial, and industrial environments. It is strong enough to dissolve scale and rust but mild enough to be safe on most materials with proper use.
Chemical Properties and Safety
Chemical Properties:
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Formula: H₃NSO₃
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Molar Mass: 97.10 g/mol
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Appearance: White crystalline powder
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Solubility: 181.4 g/L in water at 20°C
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Melting Point: 205°C (decomposes)
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pKa: 0.995
Safety Guidelines:
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Always wear gloves and eye protection when handling.
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Use in well-ventilated areas.
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Store in sealed containers in a dry, cool place.
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Do not mix with bleach or other reactive chemicals.
Top Applications of Sulphamic Acid
1. Descaling Agent
Sulphamic acid is highly effective at removing limescale in:
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Kettles
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Coffee machines
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Boilers
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Dishwashers
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Heat exchangers
2. Cleaning Toilets and Urinals
It dissolves urine scale and calcium deposits, restoring ceramic surfaces to a clean, stain-free condition.
3. Rust and Metal Cleaning
Used to remove rust from stainless steel and other metals without damaging the base material.
4. Ceramic Tile and Grout Cleaner
It lifts stains and mineral buildup from tiles, especially in hard water areas.
5. Paper and Pulp Industry
Sulphamic acid is used to prevent scale buildup in paper processing and acts as a chlorine stabiliser.
Additional Industrial and Commercial Uses
6. Swimming Pool Chlorine Neutraliser
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Use 10g per 1,000 litres of pool water to reduce free chlorine by about 10 ppm.
7. Polymer and Resin Production
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Acts as a curing agent in plastic manufacturing at 1–2% of the formula weight.
8. Textile Dye Fixing
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Used at 1–3% of fabric weight in dye baths to lock colour into fibres.
9. Organic Synthesis Catalyst
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Employed in esterification and acetylation reactions at 0.1–1% concentrations.
10. Water Softening and Scale Control
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Applied in industrial systems at 0.5–2 kg per tonne of water to remove calcium and magnesium ions.
How to Use Sulphamic Acid: Dosages and Examples
Boiler Descaling
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Mix 100g of sulphamic acid in 1L warm water (10% solution).
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Circulate through the system for 30–60 minutes.
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Rinse thoroughly.
Coffee Machine and Kettle
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Use 10g per litre of water.
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Run through the machine.
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Rinse with clean water two to three times.
Tile and Grout
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Mix 80–100g per litre for stubborn stains.
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For coloured grout, use 20g per litre.
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Scrub gently and rinse.
Toilet Bowl Cleaning
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Pour in 100g dissolved in 1L water.
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Let sit for 30 minutes.
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Scrub and flush.
Industrial Equipment
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Use 300g per litre for heavy duty cleaning.
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Soak or circulate for up to 1 hour.
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Rinse multiple times.
Where to Buy Sulphamic Acid UK Online
When it comes to sourcing high-quality sulphamic acid, HD Chemicals LTD is a leading choice for both domestic and industrial users. Their sulphamic acid product has 99.5% purity and is available in convenient sizes including 150g, 250g, 500g, 1.5kg, and 3kg.
You can:
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Buy sulphamic acid online in the UK here: Buy sulphamic acid online in the UK
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Get high-purity sulphamic acid from a UK chemical supplier here: High-purity sulphamic acid from UK chemical supplier
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Order sulphamic acid for descaling and cleaning in the UK here: Order sulphamic acid for descaling and cleaning in the UK
HD Chemicals provides fast delivery, secure packaging, and excellent customer service to ensure you receive a reliable supply for your cleaning or industrial needs.
Frequently Asked Questions (FAQs)
1. Is sulphamic acid safe for aluminium?
Yes, when diluted properly and rinsed quickly, it’s safe for aluminium surfaces.
2. Can I mix sulphamic acid with bleach?
No. This produces toxic chlorine gas. Use them separately.
3. How long can I store sulphamic acid?
Indefinitely if kept in a sealed, moisture-free container.
4. Can I use sulphamic acid to clean a central heating system?
Yes, using a 10% solution. Always consult the system manufacturer first.
5. Does sulphamic acid expire?
Not in a dry state, but it may clump if exposed to moisture.
6. Is it safe for natural stone like marble?
No. It may etch or damage calcium-based stones like marble or limestone.
7. How do I neutralise it after use?
Use a baking soda solution until bubbling stops.
8. Can it be used to remove efflorescence?
Yes, mix 50g per litre of water, apply, then rinse well.
9. Is it suitable for household use?
Absolutely. When used correctly, it's effective and safe for domestic descaling and cleaning.
10. Is sulphamic acid biodegradable?
No, but it has low environmental toxicity and is typically neutralised in wastewater systems.
This complete guide provides everything you need to know about using sulphamic acid effectively and safely. Whether you’re a homeowner or an industrial user, sulphamic acid is a practical and cost-effective solution for tackling tough cleaning challenges. For your supply, trust HD Chemicals LTD – your reliable UK chemical supplier.