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Iron(II) sulfate heptahydrate

CAS 7782-63-0 · 40/100 · High conf.

Also registered as 2 other CAS numbers

15491-23-3 · 1801184-53-1

Iron(II) sulfate heptahydrate chemical structure

Concern score

40/100Moderate concern based on regulatory listings.
High confidence

Iron(II) sulfate heptahydrate in plain language

What it is

Also known as Ferrous sulfate · Ferrous sulfate heptahydrate · Ferrous sulfate hydrate · Exsiccated ferrous sulfate · Iron sulfate heptahydrate · Ferrous ii sulfate heptahydrate

Show all 50 names

Ferrous sulphate · Ferrous sulphate heptahydrate · Green vitriol · Iron vitriol · IRON(2+) sulphate (1:1) heptahydrate · Iron(ii) sulfate (1:1), heptahydrate · Iron(ii) sulphate (1:1), heptahydrate · Iron(2+) sulfate (1:1) heptahydrate · Iron(2+) sulfate--water (1/1/7) · Sulfuric acid, IRON(2+) salt (1:1), heptahydrate · iron(2+);sulfate;heptahydrate · Copperas · Caswell No. 460 · ELINCS No.: 231-753-5 · Feosol · Feospan · Fer-in-sol · Fero-gradumet · Ferrosulphate heptahydrate · Ferrous sulfate 7-HYDRATE · Fesofor · FerroHepta · Fesotyme · Haemofort · Iron (ii) sulfate heptahydrate · Iron(ii) sulphate heptahydrate · Ironate · Iron sulfate heptahydrate (FeSO4.7H2O) · Iron(2+) sulfate heptahydrate · Irosul · Mol-iron · Melanterite · Melanterite mineral · Presfersul · Sulferrous · Siderotil mineral · Szomolnikite mineral · Tauriscite mineral · Tetucur-S · ferrous sulfate (cercla) · ferrous sulfate (sara iii) · Ferrum sulphuricum · Folvron component ferrous sulfate · Iron (as ferrous sulfate)

What it does

Used in consumer products as a thickener and a flavouring.

  • Thickener
  • Flavouring
Is it a concern?
Moderate concern: no hazard classifications on record.

Why it's flagged

EPA CPDat observed this chemical in 80 composition records across product categories including Laboratory supplies, Landscape/yard, Industrial products.

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

No restrictions found. Iron(II) sulfate heptahydrate appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Pharma
  • Food
  • Industrial
  • EUEFSAEFSA opinion2 entries
    • Safety and efficacy of iron compounds (E1) as feed additives for all animal species: ferrous carbonate; ferric chloride, hexahydrate; ferrous fumarate; ferrous sulphate, heptahydrate; ferrous sulphate, monohydrate; ferrous chelate of amino acids, hydrate; ferrous chelate of glycine, hydrate, based on a dossier submitted by FEFANA asbl (EFSA FEEDAP)Source →
    • Scientific Opinion on the safety and efficacy of iron compounds (E1) as feed additives for all species: ferrous sulphate heptahydrate based on a dossier submitted by Kronos International, Inc. (EFSA FEEDAP)Source →
  • EUEFSAConclusion on Pesticides Peer ReviewConclusion on the peer review of the pesticide risk assessment of the active substance iron sulfate (EFSA)
    • Conclusion on the peer review of the pesticide risk assessment of the active substance iron sulfate (EFSA)Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 80 composition records across product categories including Laboratory supplies, Landscape/yard, Industrial products. EPA CPDat classifies this chemical for functional uses including Processing aids not otherwise specified, Thickening agent, Flavouring and nutrient.
    • EPA CPDat observed this chemical in 80 composition records across product categories including Laboratory supplies, Landscape/yard, Industrial products. EPA CPDat classifies this chemical for functional uses including Processing aids not otherwise specified, Thickening agent, Flavouring and nutrient.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

  • JECFA

    Joint FAO/WHO Expert Committee on Food Additives

    No JECFA evaluation on file.

  • EFSA

    European Food Safety Authority

    • Safety and efficacy of iron compounds (E1) as feed additives for all animal species: ferrous carbonate; ferric chloride, hexahydrate; ferrous fumarate; ferrous sulphate, heptahydrate; ferrous sulphate, monohydrate; ferrous chelate of amino acids, hydrate; ferrous chelate of glycine, hydrate, based on a dossier submitted by FEFANA asbl (EFSA FEEDAP)

      2016 · EU EFSA listing · Read the source →

    • Scientific Opinion on the safety and efficacy of iron compounds (E1) as feed additives for all species: ferrous sulphate heptahydrate based on a dossier submitted by Kronos International, Inc. (EFSA FEEDAP)

      2014 · EU EFSA listing · Read the source →

    • Conclusion on the peer review of the pesticide risk assessment of the active substance iron sulfate (EFSA)

      2012 · EU EFSA listing · Read the source →

Evidence & sources

No graded research studies for Iron(II) sulfate heptahydrate yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

  • EFSA OpenFoodTox

    regulatory · updated 2026-10-04

    Open →

  • EPA Chemical and Products Database

    exposure · updated January 7, 2008

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →

Allergen profile

Canonical allergen markers detected on this ingredient. Each row is derived from the ingredient’s name or synonyms matching a known allergen class — useful when scanning a label for a specific allergy context.

  • MolluscsContains · Oral (ingested)

    Source: chemindex_name_match

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

How often EPA CPDat has listed Iron(II) sulfate heptahydrate in a product composition. These are source records, not Greenveil catalog products.

Source records

80

Named organisations

4

Laboratory suppliesLandscape/yardIndustrial productsFood and drugPersonal care

Typical roles

ThickenerFlavouring
See products using Iron(II) sulfate heptahydrate →

Catalog

Found in these products

Their ingredient lists include Iron(II) sulfate heptahydrate; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 1000+ →Find products without it →

Co-occurrence

Often appears with

Ingredients that frequently appear alongside Iron(II) sulfate heptahydrate in the catalog.