Sulfuric acid

E number E513CAS 7664-93-9

Sulfuric acid is an acidity regulator and processing aid, used to adjust pH in food processing and in producing other additives.

Where it is and isn’t permitted

Status of Sulfuric acid 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 184.1095retrieved 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 industrially by the contact process from sulfur or sulfide ores. It is the highest-tonnage industrial chemical in the world.

  • Vegan
  • Vegetarian
CAS registry number
7664-93-9
InChIKey
QAOWNCQODCNURD-UHFFFAOYSA-N
PubChem
CID 1118

Every name it appears under

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

E number

  • E513

CAS registry number

  • 12772-98-4
  • 7664-93-9

As it appears in regulation

  • Sulfuric acid

Other names

  • -sulfuric acid
  • 0.5M Sulphuric acid
  • 4.1M Sulfuric acid
  • Acide sulfurique
  • Acido solforico
  • Acido sulfurico
  • Acidum sulfuricum
  • Acidum Sulphuricum
  • Anhydrous sulfuric acid
  • Battery acid
  • BOV
  • Brimstone acid
  • Caswell No. 815
  • Colds Flu
  • Dihydrogen sulfate
  • Dihydrogen sulphate
  • dihydroxidodioxidosulfur
  • Dipping acid
  • E 513
  • Electrolyte acid
  • EPA Pesticide Chemical Code 078001
  • G-sulfuric acid
  • HSDB 1811
  • INS NO.513
  • INS-513
  • Matting acid
  • Mattling acid
  • Nordhausen acid
  • O40UQP6WCF
  • Oil of vitriol
  • Opsonat
  • Oriental Medicine Detox
  • Retinol Impurity A
  • Schwefelsaeure
  • Schwefelsaeureloesungen
  • suIfuric acid
  • suiphuric acid
  • sulfur acid
  • Sulfur oxide (SO4)
  • SULFURIC ACID
  • Sulfuric acid (aqueous)
  • Sulfuric acid (NF)
  • Sulfuric acid 30%
  • Sulfuric acid 36%
  • Sulfuric acid 50%
  • Sulfuric acid, 60%
  • Sulfuric Acid, 96%
  • Sulfuric Acid, ACS Grade
  • Sulfuric acid, ACS reagent, 95.0-98.0%
  • Sulfuric acid, spent
  • sulfuric aicd
  • sulfuric-acid
  • sulfuricacid
  • sulphur-ic acid
  • Sulphuric acid
  • Sulphuric acid, dilute
  • Sulphuricum acidum
  • tetraoxosulfuric acid
  • Zwavelzuuroplossingen

Systematic names

  • sulfuric acid

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/sulfuric-acid.json