Copper sulfate

CAS 7758-99-8

Copper sulfate is a copper source in fortified foods and a processing aid, and is also used to supplement animal feed.

Where it is and isn’t permitted

Status of Copper sulfate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted21 CFR 184.1261retrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFANot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.

What it is made from

Produced by dissolving copper oxide or metal in sulfuric acid.

  • Vegan
  • Vegetarian
CAS registry number
7758-99-8
InChIKey
JZCCFEFSEZPSOG-UHFFFAOYSA-L
PubChem
CID 24463

Every name it appears under

59 recorded names. A label may use any of them.

CAS registry number

  • 7758-98-7
  • 7758-99-8

As it appears in regulation

  • Copper sulfate

Other names

  • Blue copper AS
  • Blue Vicking
  • Bluestone
  • Calcanthite
  • Caswell No. 256
  • CCRIS 5556
  • Chinese Pharmacopoeia Reagent Coloration - Primary Solution Blue
  • copper (2+) sulfate pentahydrate
  • COPPER (AS CUPRIC SULFATE) [VANDF]
  • Copper sulfate
  • Copper sulfate (CuSO4) pentahydrate
  • Copper sulfate pentahydrate
  • copper sulfate-penta hydrate
  • copper sulphate pentahydrate
  • copper sulphate(5.H2O)
  • copper(11) sulfate pentahydrate
  • Copper(2+) sulfate--water (1/1/5)
  • copper(2+) sulfate--water (1/5)
  • COPPER(2+) SULPHATE (1:1) PENTAHYDRATE
  • COPPER(2+) SULPHATE PENTAHYDRATE
  • Copper(II) sulfate pentahydrate
  • Copper(II) sulfate pentahydrate (99.999%-Cu) PURATREM
  • Copper(II) sulfate pentahydrate, ACS reagent
  • Copper(II) sulfate pentahydrate, Trace metals grade, 99.995%
  • Copper(II) Sulfide Powder
  • copper(II) sulphate pentahydrate
  • Copper(II) sulphide, thioxocopper
  • Copper(II)sulfatepentahydrate
  • copper(II)sulphate-pentahydrate
  • COPPERFINE-ZINC
  • CuH10O9S
  • Cupric sulfate (USP)
  • Cupric Sulfate [USP]
  • cupric sulfate copper(II) sulfate, pentahydrate CuSO4.5H2O cupric sulfate pentahydrate
  • Cupric sulfate pentahydrate
  • Cupric sulfate pentahydrate, Ultra pure, USP, EP, Crystals, Low heavy metals (As: <= 1 ppm, Cd: <= 1 ppm, Pb: <= 1 ppm & Hg: <= 0.1 ppm)
  • Cupric sulfate pentahydrate, Ultra pure, USP, EP, Powder, Low heavy metals (As: <= 1 ppm, Cd: <= 1 ppm, Pb: <= 1 ppm & Hg: <= 0.1 ppm)
  • Cupric sulphate 5-hydrate
  • Cupric sulphate pentahydrate
  • CUPRUM SULPHURICUM [HPUS]
  • CuSO4(H2O)5
  • CuSO4.5H2O
  • EPA Pesticide Chemical Code 024401
  • HSDB 2968
  • Kupfersulfat-pentahydrat
  • Kupfervitriol
  • NATURAL CHALCANTHITE
  • Salzburg vitriol
  • Sentry AQ mardel coppersafe
  • SULFURIC ACID COPPER(2+) SALT (1:1), HYDRATE (1:5)
  • SULFURIC ACID, COPPER (2+) SALT (1:1), PENTAHYDRATE
  • SULFURIC ACID, COPPER (2+) SALT, PENTAHYDRATE
  • Triangle
  • Vencedor

Systematic names

  • Copper;sulfate
  • Copper;sulfate;pentahydrate

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • ecfr retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/copper-sulfate.json