Substance profile
Iron (II) sulfate
Iron (II) sulfate is white orthorhombic crystals, hygroscopic.
01 · Identification
What Iron (II) sulfate is
Iron (II) sulfate is white orthorhombic crystals, hygroscopic. Its molecular formula is FeO4S and its molecular weight is 151.91 g/mol. It boils at 300 °C, melts at 64 °C, is soluble in water.
Under the GHS it carries the signal word Warning.
02 · Identifiers
Iron (II) sulfate identifiers and molecular data
Iron (II) sulfate CAS number and EC number
Iron (II) sulfate molecular formula and molecular weight
03 · GHS classification
Iron (II) sulfate hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Iron (II) sulfate pictograms and signal word
Iron (II) sulfate hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 2A | H319 | GHS07 |
Iron (II) sulfate hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H302 | Harmful if swallowed. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
This page lists only the codes assigned to Iron (II) sulfate. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Iron (II) sulfate
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Iron (II) sulfate issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Iron (II) sulfate precautionary statements
CLP Annex VI assigns 13 precautionary statements to Iron (II) sulfate. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Iron (II) sulfate name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | железен(II) сулфат |
| Spanish español | Sulfato de hierro (II) |
| Czech čeština | síran železnatý |
| Danish dansk | jern(II)sulfat |
| German Deutsch | Eisen(II)-sulfat |
| Estonian eesti | raud(II)sulfaat |
| Greek ελληνικά | θειικός σίδηρος(ΙΙ) |
| English English | iron (II) sulfate |
| French français | sulfate de fer (II) |
| Croatian hrvatski | željezov(II) sulfat |
| Italian italiano | solfato di ferro (II) |
| Latvian latviešu | dzelzs(II) sulfāts |
| Lithuanian lietuvių | geležies (II) sulfatas |
| Hungarian magyar | vas(II)-szulfát |
| Maltese Malti | sulfat tal-ħadid (II) |
| Dutch Nederlands | ijzer(II)sulfaat |
| Polish polski | siarczan żelaza(II) |
| Portuguese português | sulfato de ferro(II) |
| Romanian română | sulfat de fier (II) |
| Slovak slovenčina | síran železnatý |
| Slovenian slovenščina | železov(II) sulfat |
| Finnish suomi | rauta(II)sulfaatti |
| Swedish svenska | järn(II)sulfat |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Iron (II) sulfate GHS label elements
Everything CLP Annex VI fixes for Iron (II) sulfate, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Iron (II) sulfate
- Harmful if swallowed.
- Causes skin irritation.
- Causes serious eye irritation.
- Wash … thoroughly after handling.
- Do not eat, drink or smoke when using this product.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF ON SKIN:
- IF IN EYES:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention.
- Rinse mouth.
- If skin irritation occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Iron (II) sulfate in the GHS label constructor →
07 · Health hazards
Iron (II) sulfate health hazards and exposure limits
Iron (II) sulfate hazard summary
An irritant to the skin, eyes, and mucous membranes; Toxic by ingestion: hemorrhagic gastroenteritis, shock, and liver damage; [Merck Index] A skin and eye irritant; [eChemPortal: ERMA; ESIS] See Ferrous sulfate heptahydrate. See Iron salts, soluble.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Iron (II) sulfate properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
Iron (II) sulfate boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 300 °C (572 °F) | above this value | DrugBank |
Iron (II) sulfate melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 64 °C (147.2 °F) | DrugBank |
Iron (II) sulfate density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 3.56 g/cm³ | HSDB | |
| 2.97 g/cm³ | at 25 °C | HSDB | |
| 3.65 g/cm³ | at 25 °C | DOE PAC |
Iron (II) sulfate solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | White to yellow crystalline powder. Sol in water. Loses water @ about 300 °C; decomp @ higher temp. | Ferrous sulfate monohydrate | HSDB |
| Soluble in water. | HSDB | ||
| 25.6 g/100 mL | DrugBank |
Iron (II) sulfate autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | Not flammable (USCG, 1999) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Iron (II) sulfate storage and handling
Iron (II) sulfate storage conditions
Store in tight containers.
Source: Hazardous Substances Data Bank (HSDB)
Iron (II) sulfate incompatible materials
May ignite on contact with arsenic trioxide and sodium nitrate.
Source: Hazardous Substances Data Bank (HSDB)
Iron (II) sulfate reactivity
Weak inorganic reducing agents, such as FERROUS SULFATE, react with oxidizing agents to generate heat and products that may be flammable, combustible, or otherwise reactive.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Iron (II) sulfate in the storage compatibility matrix →
10 · Questions
Iron (II) sulfate — frequently asked questions
What is the CAS number of Iron (II) sulfate?
The CAS number of Iron (II) sulfate is 7720-78-7. Its EC number is 231-753-5.
What is the chemical formula of Iron (II) sulfate?
The molecular formula of Iron (II) sulfate is FeO4S and its molecular weight is 151.91 g/mol.
What does a Iron (II) sulfate label have to show?
Under CLP Annex VI the label for Iron (II) sulfate carries the pictogram Exclamation mark and the signal word is Warning.
Is Iron (II) sulfate flammable?
CLP Annex VI assigns Iron (II) sulfate no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.
Is Iron (II) sulfate a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Iron (II) sulfate. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the boiling point of Iron (II) sulfate?
The boiling point reported for Iron (II) sulfate is 300 °C (572 °F), above this value (DrugBank).
What is the melting point of Iron (II) sulfate?
The melting point reported for Iron (II) sulfate is 64 °C (147.2 °F) (DrugBank).
How should Iron (II) sulfate be stored?
Store in tight containers. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Iron (II) sulfate
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