Methional

Description

Methional · CAS 3268-49-3 · C4H8OS. UNII 0AAO8V0F1R. Boiling Point: BP: 62 °C at 11 mm Hg; Boiling Point: 165 °C; Boiling Point: 165-166 °C.

Identification

Computed Descriptors

Physical & Chemical Properties

Physical description & handling notes

• 4-thiapentanal appears as a colorless to amber liquid with an extremely foul and persistent odor. Slightly soluble in water and denser than water. Contact may slightly irritate skin, eyes and mucous membranes. Moderately toxic. Used as a food additive.
• Liquid
• Colorless liquid with a pungent odor; [ICSC] Colorless to amber liquid with an extremely bad and persistent odor; [CAMEO]
• COLOURLESS LIQUID WITH PUNGENT ODOUR.
• colourless to pale yellow liquid; powerful and diffusive onion and meat-like odour; in dilution, more pleasant, less onion-like, remniscient of boullion
• Colorless to pale yellow liquid

Regulatory Status

GHS Hazard Classification

Documented Uses

• Naturally present in plants and aquatic animals; Used nearly exclusively as an intermediate in chemical synthesis; Also used in small quantities as a flavoring agent; [OECD SIDS: 3-(Methylthio) propionaldehyde – 2003]
• Table: Reported uses (ppm): (Flavor and Extract Manufacturers' Association, 1994) [Table#8611]
• The vast majority of 3-(methylthio) propionaldehyde is used as intermediate in chemical industry for the production of the amino acid methionine and methionine-hydroxyl analoge. A minor use of 3-(methylthio) propionaldehyde as a food flavoring agent has been identified.
• Flavouring Agent -> FLAVOURING_AGENT -> JECFA Functional Classes
• Flavoring Agents -> JECFA Flavorings Index
• The production of 3-(methylthio) propionaldehyde by reaction of acrolein with methylmercaptan is conducted in a closed reaction vessel followed by a distillative purification. The separated light and high boiler products are fed into a thermal oxidizer.

Synonyms

3-(Methylthio)propionaldehyde; Methional; 3268-49-3; Propanal, 3-(methylthio)-; 4-Thiapentanal; Propionaldehyde, 3-(methylthio)-; 3-Methylmercaptopropyl aldehyde; Methylmercaptopropionic aldehyde; methylmercaptopropionaldehyde; FEMA No. 2747; 0AAO8V0F1R; 3-[Methylthio]propionaldehyde; THIAPENTANAL; RefChem:811735; METHYL MERCAPTOPROPIONALDEHYDE; 221-882-5

Frequently Asked Questions

What are the CAS number and molecular formula of Methional?

CAS 3268-49-3; molecular formula C4H8OS; molecular weight — g/mol.

What other names is Methional known by?

3-(Methylthio)propionaldehyde, Methional, 3268-49-3, Propanal, 3-(methylthio)-, 4-Thiapentanal, Propionaldehyde, 3-(methylthio)-.

What is the regulatory status of Methional?

Documented regulatory listings: EU Flavoring substances; FDA Substance added to food: FLAVORING AGENT OR ADJUVANT; Flavoring Agents.

Is Methional classified as hazardous?

0.1% of GHS notifications report no hazard classification (1 of 1661).

What are the key physical properties of Methional?

Boiling Point: BP: 62 °C at 11 mm Hg; Boiling Point: 165 °C; Boiling Point: 165-166 °C; Melting Point: -75 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.

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