Thiamine mononitrate

CAS 532-43-4

Thiamine mononitrate is the vitamin B1 form preferred for dry fortification of flour and cereals, because it absorbs less moisture than the hydrochloride and keeps better in a bag.

Where it is and isn’t permitted

Status of Thiamine mononitrate 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 184.1878retrieved 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 chemical synthesis. Despite carrying nitrate in the name, the amount contributed to the diet is negligible next to nitrate from vegetables.

  • Vegan
  • Vegetarian
CAS registry number
532-43-4
InChIKey
UIERGBJEBXXIGO-UHFFFAOYSA-N
PubChem
CID 10762

Every name it appears under

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

CAS registry number

  • 532-43-4

As it appears in regulation

  • Thiamine mononitrate

Other names

  • Aneurine mononitrate
  • Aneurine nitrate
  • Betabion mononitrate
  • CAS-532-43-4
  • Mononitrate, Thiamine
  • Mononitrato de tiamina
  • thiamin mononitrate
  • Thiamine mononitrate
  • Thiamine mononitrate (USP)
  • Thiamine mononitrate, >=98% (HPLC)
  • Thiamine mononitrate, British Pharmacopoeia (BP) Reference Standard
  • thiamine nitrate
  • Thiamine nitrate (JP17)
  • Thiamine nitrate (salt)
  • Thiamine nitrate (Standard)
  • Thiamine nitrate CRS
  • Thiamine nitrate, 95%
  • Thiamine nitrate, AldrichCPR
  • Thiamine nitrate, European Pharmacopoeia (EP) Reference Standard
  • Thiamine Nitrate, Pharmaceutical Secondary Standard; Certified Reference Material
  • Thiamine nitratel
  • Thiaminenitrate
  • Thiamini mononitras
  • Vitamin B(sub 1) nitrate
  • Vitamin b1 (as thiamine nitrate)
  • Vitamin B1 mononitrate
  • Vitamin B1 nitrate
  • Vitanon (TN)

Systematic names

  • 2-[3-[(4-amino-2-methyl-pyrimidin-5-yl)methyl]-4-methyl-thiazol-3-ium-5-yl]ethanol;nitrate
  • 2-[3-[(4-amino-2-methylpyrimidin-5-yl)methyl]-4-methyl-1, 3-thiazol-3-ium-5-yl]ethanol nitrate
  • 3-((4-Amino-2-methyl-5-pyrimidinyl)methyl)-5-(2-hydroxyethyl)-4-m-ethylthiazolium nitrate (salt)
  • 3-((4-Amino-2-methyl-5-pyrimidinyl)methyl)-5-(2-hydroxyethyl)-4-methylthiazolium nitrate
  • 3-((4-amino-2-methylpyrimidin-5-yl)methyl)-5-(2-hydroxyethyl)-4-methylthiazol-3-ium nitrate
  • 3-(4-Amino-2-methylpyrimidin-5-ylmethyl)-5-(2-hydroxyethyl)-4-methylthiazolium nitrate
  • 3-(4-Amino-2-methylpyrimidyl-5-methyl)-4-methyl-5,beta-hydroxyethylthiazolium nitrate
  • 3-[(4-Amino-2-methylpyrimidin-5-yl)methyl]-5-(2-hydroxyethyl)-4-methyl-1,3-thiazol-3-ium nitrate
  • Thiazolium, 3-((4-amino-2-methyl-5-pyrimidinyl)methyl)-5-(2-hydroxyethyl)-4-m-ethyl-, nitrate (salt)
  • Thiazolium, 3-((4-amino-2-methyl-5-pyrimidinyl)methyl)-5-(2-hydroxyethyl)-4-methyl-, nitrate (1:1)
  • Thiazolium, 3-((4-amino-2-methyl-5-pyrimidinyl)methyl)-5-(2-hydroxyethyl)-4-methyl-, nitrate (salt)
  • Thiazolium, 3-[(4-amino-2-methyl-5-pyrimidinyl)methyl]-5-(2hydroxyethyl)-4-m-ethyl-, nitrate (salt)

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/thiamine-mononitrate.json