4,5-Dimethylthiazole

Description

4,5-Dimethylthiazole · CAS 3581-91-7 · C5H7NS. UNII U3RP5I088G. Boiling Point: 157.00 to 159.00 °C. @ 760.00 mm Hg; Boiling Point: 158 °C (742 mm Hg); Melting Point: 83 - 84 °C.

Identification

CAS Registry Number	3581-91-7
PubChem CID	62510
Molecular formula	C5H7NS
IUPAC name	4,5-dimethyl-1,3-thiazole
UNII (FDA)	U3RP5I088G
FEMA number	3274
JECFA number	1035

Computed Descriptors

Molecular Weight	113.18
XLogP3	1.8
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	113.02992040
Monoisotopic Mass	113.02992040
Topological Polar Surface Area	41.1
Heavy Atom Count	7
Formal Charge	0

Physical & Chemical Properties

Boiling Point	157.00 to 159.00 °C. @ 760.00 mm Hg
Boiling Point	158 °C (742 mm Hg)
Melting Point	83 - 84 °C
Density	1.067-1.072
Refractive Index	1.516-1.524

Physical description & handling notes

• Solid
• Clear colourless liquid; roasted, nutty, meaty, boiled poultry-like odour
• Soluble in ether
• Miscible at room temperature (in ethanol)

Regulatory Status

Regulatory & Food Contact	EU Flavoring substances FDA Substance added to food: FLAVORING AGENT OR ADJUVANT Flavoring Agents FLAVOURING_AGENT: Flavouring Agent Green, Nut, Roast, Roasted No safety concern at current levels of intake when used as a flavouring agent

GHS Hazard Classification

Reported hazard statements	H302 (98.1%)

Documented Uses

• Flavouring Agent -> FLAVOURING_AGENT -> JECFA Functional Classes
• Flavoring Agents -> JECFA Flavorings Index

Synonyms

4,5-DIMETHYLTHIAZOLE; 3581-91-7; 4,5-Dimethyl-1,3-thiazole; Thiazole, 4,5-dimethyl-; 4,5-dimethyl thiazole; FEMA No. 3274; EINECS 222-703-3; BRN 0105694; U3RP5I088G; DTXSID40189348; 4-27-00-00986 (Beilstein Handbook Reference); 4,5-DIMETHYL THIAZOLE [FHFI]; RefChem:507854; DTXCID70111839; 222-703-3; 4,5-dimethyl-thiazole

Frequently Asked Questions

What are the CAS number and molecular formula of 4,5-Dimethylthiazole?

CAS 3581-91-7; molecular formula C5H7NS; molecular weight — g/mol.

What other names is 4,5-Dimethylthiazole known by?

4,5-DIMETHYLTHIAZOLE, 3581-91-7, 4,5-Dimethyl-1,3-thiazole, Thiazole, 4,5-dimethyl-, 4,5-dimethyl thiazole, FEMA No. 3274.

What is the regulatory status of 4,5-Dimethylthiazole?

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

Is 4,5-Dimethylthiazole classified as hazardous?

Hazard statements reported: H302.

What are the key physical properties of 4,5-Dimethylthiazole?

Boiling Point: 157.00 to 159.00 °C. @ 760.00 mm Hg; Boiling Point: 158 °C (742 mm Hg); Melting Point: 83 - 84 °C; Density: 1.067-1.072.

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.