2-isobutyl-5-methyl thiazole

2-isobutyl-5-methyl thiazole is a heterocyclic organic compound classified within the thiazole chemical family. It is identified by the molecular formula C8H13NS and a molecular weight of approximately 155.26 g/mol. This compound appears as a colorless to pale yellow liquid and is noted for its distinctive fruity odor characterized by tropical fruit and green nut nuances, perceptible at a 1% dilution in dipropylene glycol. Synonyms such as 5-methyl-2-(2-methylpropyl)-1,3-thiazole reflect its structural composition. The compound is listed in authoritative chemical databases including PubChem (CID 574811). Though it carries notable olfactory characteristics, it is primarily of research interest and is not commercially used as a flavoring or fragrancing agent. It typically derives from synthetic organic chemistry routes involving thiazole derivatives.

While 2-isobutyl-5-methyl thiazole is a chemically defined thiazole derivative, it does not have known natural biological occurrence or significant commercial application in foods or fragrances. Its scent profile exhibits green, tropical fruit, and nutty notes that may interest sensory scientists and flavor chemists. Currently, the compound is classified under informational status only and is not utilized in fragrance or flavor formulations. Usage and safety recommendations indicate exclusion from flavor and fragrance applications. Chemical safety and regulatory data consider it non-hazardous under OSHA (United States) hazard communication standards. The absence of commercial use restricts potential functional applications outside academic or industrial research contexts.

2-isobutyl-5-methyl thiazole exhibits physicochemical properties characteristic of thiazole heterocycles with alkyl substituents. It has a moderate estimated octanol-water partition coefficient (XLogP3) around 3.0, indicating a balance between hydrophobicity and some aqueous solubility. The compound's boiling point is measured between 208 and 209°C at standard atmospheric pressure (760 mm Hg), reflecting notable thermal stability. Vapor pressure at 25°C is low, approximately 0.313 mmHg, consistent with a less volatile liquid under ambient conditions. Solubility profiles show it is soluble in alcohol solvents and estimated to have limited but notable solubility in water (~75.6 mg/L at 25°C). The flash point of this compound is reported at 74°C (166°F), relevant to handling and formulation safety protocols. These properties influence its chemical stability, volatility, and interactions when considered for sensory research or chemical synthesis rather than practical application in consumer products.

(IUPAC):	Atomic Weights of the Elements 2011 (pdf)
Videos:	The Periodic Table of Videos
tgsc:	Atomic Weights use for this web site
(IUPAC):	Periodic Table of the Elements
HMDB (The Human Metabolome Database):	Search
Export Tariff Code:	2934.10.0000
ChemSpider:	View

Safety information

Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Pictogram
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
Not determined
Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined

Safety in use information

Category:
information only not used for fragrances or flavors
Recommendation for 2-isobutyl-5-methyl thiazole usage levels up to:
	not for fragrance use.
Recommendation for 2-isobutyl-5-methyl thiazole flavor usage levels up to:
	not for flavor use.

Safety references

EPI System: View

AIDS Citations:Search

Cancer Citations:Search

Toxicology Citations:Search

EPA ACToR:Toxicology Data

EPA Substance Registry Services (SRS):Registry

Laboratory Chemical Safety Summary :574811

National Institute of Allergy and Infectious Diseases:Data

5-methyl-2-(2-methylpropyl)-1,3-thiazole