W274704 Aldrich


≥97%, FG

Synonym: 3-(Methylmercapto)propionaldehyde, 3-(Methylthio)propanal, 3-(Methylthio)propionaldehyde, Methional, NSC 15874

  • CAS Number 3268-49-3

  • Linear Formula CH3SCH2CH2CHO

  • Molecular Weight 104.17

  •  FEMA Number 2747

  •  Beilstein Registry Number 1739289

  •  EC Number 221-882-5

  •  Council of Europe no. 125

  •  MDL number MFCD00007022

  •  PubChem Substance ID 24901307

  •  Flavis number 12.001



Related Categories Alphabetical Listings, Certified Food Grade Products, Flavors and Fragrances, Follows IFRA Guidelines, Halal Certified Products,
biological source   synthetic
grade   FG
  follows IFRA guidelines
reg. compliance   EU Regulation 1223/2009
  FDA 21 CFR (172.515)
  EU Regulation 1334/2008 & 178/2002
vapor density   >1 (vs air)
vapor pressure   760 mmHg ( 165 °C)
assay   ≥97%
refractive index   n20/D 1.483(lit.)
bp   165-166 °C(lit.)
density   1.043 g/mL at 25 °C(lit.)
Documentation   see Safety & Documentation for available documents
Organoleptic   cheese; creamy; mushroom; vegetable; earthy; potato; tomato
food allergen   no known allergens
fragrance allergen   no known allergens


Biochem/physiol Actions

Odor at 0.1%

Taste at 5 ppb-5 ppm

Other Notes

Natural occurrence: Asparagus, baked potato, beans, beer, cheddar cheese, cooked chicken, macadamia nut, peanuts and potato chips.

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1 kg in glass bottle

5, 25 kg in composite drum


Reactant involved in:
• Homolytic cross-coupling reactions
• Oxidative coupling and chemoselective oxidation
• Intermolecular alkyne hydroacylation reactions
• Oxidation of sulfides to sulfoxides

General description

Methional is the main sulfur-containing flavor compound in potatoes.

New F&F Product Supplement
Protocols & Articles


Securing a Traceable Supply Chain for Food Grade Flavor Ingredients

Introduction Defining "Food Grade" Understanding "Food Grade" Versus "Industrial Grade" Top Questions to Ask a Flavor & Fragrances Supplier The Sigma-Aldrich Approach
Dr. Luke Grocholl
Quality Assurance Supervisor, Sigma-Aldrich Flavors & Fragrances
Keywords: Food & Beverage, Food Safety, Solvents

Understanding the Complexities of Kosher Ingredients

Introduction What is Kosher Product Considerations for Kosher Certification Kosher's Added Benefit to the Food Industry Sigma-Aldrich's Kosher Experience and Offering
Dr. Luke Grocholl1, Rabbi Gershon Segal

1Dr. Luke Grocholl, Quality Assurance Supervisor, Sigma-Aldrich Flavors & Fragrances
Keywords: Fermentation, Food & Beverage, Safety industry

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