Molekula
Ammonium iron(III) sulfate anhydrous
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Ammonium iron(III) sulfate anhydrous is a crystalline inorganic compound used as a coagulant in water treatment and as a reagent in analytical chemistry. It is a source of ferric ions and ammonium sulfate. CAS: 10138-04-2, Molecular formula: NH4Fe(SO4)2, Molecular weight: 266.01 g/mol, Storage: Ambient, Signal word: Danger.
Molekula supplies Ammonium iron(III) sulfate anhydrous at ⩾ 97.5% purity in 100 g and 500 g packs, from £25.80 inc. VAT. It is made or sourced to order. Every batch ships with a certificate of analysis, and safety data sheets are available in 6 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
On backorder — expected to ship by 5 December 2026
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £21.50 per pack ex VAT · £25.80 inc. VAT
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500 g — £71.90 per pack ex VAT · £86.28 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Purple crystals |
| Water | ≤ 1.0% |
| Assay | ⩾ 97.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90031494 |
| CAS Number | 10138-04-2 |
| Molecular Formula | NH4Fe(SO4)2 |
| Molecular Weight | 266.01 |
| SMILES | [Fe+3].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].N |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28332951 |
| Tariff Code | 2833298080 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H318 Causes serious eye damage
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is ammonium iron(III) sulfate anhydrous used for?
It is commonly used as a coagulant in water treatment and as a reagent in analytical chemistry for iron determination.
What is the chemical formula and molecular weight?
The formula is NH4Fe(SO4)2 with a molecular weight of 266.01 g/mol.
How should it be stored?
Store at ambient temperature in a dry, well-ventilated area away from incompatible materials.
What grade is available?
It is supplied as purple crystals to a specification of assay ⩾ 97.5% and water ≤ 1.0%.
Can Molekula supply it in bulk?
Yes, Molekula can supply ammonium iron(III) sulfate anhydrous in bulk quantities—please contact sales for details.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Where can I buy Ammonium iron(III) sulfate anhydrous?
Directly from Molekula, which lists Ammonium iron(III) sulfate anhydrous in 100 g and 500 g packs from £25.80 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.