Flectol H

Flectol H is a trade name for a polymerised quinoline compound used as an antioxidant and antiozonant in rubber. The FDA prohibits it in rubber articles intended to contact food.

Where it is and isn’t permitted

Status of Flectol H by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationProhibited

Prohibited from indirect addition to human food through food-contact surfaces.

21 CFR 189.220retrieved 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

Polymerised 1,2-dihydro-2,2,4-trimethylquinoline, synthesised from aniline and acetone. It is a rubber-compounding chemical rather than anything intended to be eaten.

InChIKey
ZNRLMGFXSPUZNR-UHFFFAOYSA-N
PubChem
CID 8981

Every name it appears under

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

CAS registry number

  • 147-47-7
  • 31014-67-2

As it appears in regulation

  • Flectol H

Other names

  • 1,2-DIHYDRO-2,2,4-TRIMETHYLQUINOLINE
  • 1,2-Dihydro-2,2,4-trimethylquinoline (85per cent)
  • 1,2-Dihydro-2,2,4-trimethylquinoline (>85%)
  • 1,2-Dihydro-2,2,4-trimethylquinoline (monomer)
  • 1,2-dihydroTMQ
  • 2,2,4-Trimethyl-1,2-dihydrochinolin
  • 2,2,4-Trimethyl-1,2-dihydroquinoline
  • 2,2,4-Trimethyl-1,2-dihydroquinone
  • 2,2,4-trimethyl-1H-quinoline
  • 2,4-Trimethyl-1,2-dihydroquinoline
  • 2,4-Trimethyl-1,2-dihydroquinone
  • Acetonanil (Salt/Mix)
  • Acetonanyl (Salt/Mix)
  • Acetone anil
  • Acetone anil (quinoline deriv.)
  • Acetone anil (quinoline derivative)
  • Agerite resin D
  • ANTIOXIDANT FR-SB
  • CAS-147-47-7
  • CCRIS 4795
  • CCRIS 4914
  • Flectol A
  • Flectol H
  • Flectol pastilles
  • HSDB 1103
  • InChI=1/C12H15N/c1-9-8-12(2,3)13-11-7-5-4-6-10(9)11/h4-8,13H,1-3H3
  • Polnox R
  • Poly(1,2-dihydro-2,2,4-trimethylquinoline) Softening point 80-100 degrees C
  • Quinoline, 1,2-dihydro-2,2,4-trimethyl-
  • TMDQ
  • Trimethyl dihydroquinoline
  • Trimethyl-1,2-dihydroquinoline
  • Vulkanox HS/LG
  • Vulkanox HS/powder
  • WLN: T66 BM CHJ C1 C1 E1
  • ZNRLMGFXSPUZNR-UHFFFAOYSA-

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/flectol-h.json