Molekula
Iron (ll) Sulfate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Iron(II) sulfate is a water-soluble iron salt commonly used in water treatment for iron removal, as a coagulant in wastewater, and in agricultural applications as a micronutrient fertilizer. It appears as a light green to blue-green crystalline solid in its hydrated forms, with varying water content. This chemical has a CAS number of 7720-78-7 and a molecular formula of FeSO₄ · XH₂O, where X typically ranges from 1 to 7, giving it a molecular weight of approximately 278.01 g/mol. It is safely stored at ambient conditions but requires careful handling, as indicated by its "Warning" signal word: it may be corrosive to metals, is harmful if swallowed, may cause an allergic skin reaction and causes serious eye irritation. Molekula supplies Iron(II) sulfate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 | White to pale turquoise solid |
| Purity | ⩾ 90.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90026648 |
| CAS Number | 7720-78-7 |
| Molecular Formula | FeSO4 · XH2O |
| Molecular Weight | 278.01 |
| SMILES | [O-]S(=O)(=O)[O-].[Fe+2] |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28332920 |
| Tariff Code | 2833298080 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H290 May be corrosive to metals
- H302 Harmful if swallowed
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P332+313 IF skin irritation occurs: 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.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is iron(II) sulfate commonly used for?
Iron(II) sulfate is primarily used as a dietary iron supplement, in water treatment for phosphate removal, as a coagulant in wastewater treatment, and in the production of iron oxides for pigments.
What is the chemical formula and molecular weight of iron(II) sulfate?
The formula is FeSO₄·XH₂O (where X varies by hydrate form), and the molecular weight for the heptahydrate (most common) is 278.01 g/mol.
How should iron(II) sulfate be stored?
Store in a cool, dry place at ambient temperature, protected from moisture and strong oxidizing agents. Keep containers tightly sealed.
What grades of iron(II) sulfate does Molekula supply?
We supply technical grade and pharmaceutical grade (where applicable) iron(II) sulfate, with varying purity levels and hydrate forms.
Can Molekula supply iron(II) sulfate in bulk quantities?
Yes, we offer bulk packaging options (e.g., 25 kg bags, 1-tonne supersacks) for industrial and commercial applications—please inquire for specific lead times.
What documentation comes with an order of iron(II) sulfate?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
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.