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CAS 7720-78-7

CAS 7720-78-7 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 7720-78-7
CAS 7720-78-7PubChem CID 24393

Ferrous Sulfate

Iron(2+) sulfate (anhydrous) is a compound of iron and sulfate in which the ratio of iron(2+) to sulfate ions is 1:1. Various hydrates occur naturally - most commonly the heptahydrate, which loses water to form the tetrahydrate at 57C and the monohydrate at 65C. It has a role as a reducing agent. It is an iron molecular entity and a metal sulfate. It contains an iron(2+). — ChEBI

IUPAC name
iron(2+) sulfate
Molecular formula
FeO4S
Molecular weight
151.91 g/mol
Exact mass
151.886665 Da
Topological polar surface area
88.6 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
4
Covalent units
2
Defined stereocentres
0

Also known as

Iron(II) sulfateFerrous sulphateFerrous sulfate anhydrousIron sulphateFerrosulfateIron sulfate (1:1)CombironDuretter
16 more reported names
DuroferonFerobuffFerralynFersolateFerolixFerulenFerusalIrospanKesukaOdophosSal chalybisFerro-TheronIron monosulfateSorbifer durulesFeSO4Slow Fe
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 7720-78-7

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How CAS 7720-78-7 is used on this site

CAS 7720-78-7 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 7720-78-7 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.