Description References
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Product Name: |
2-Acetylthiazole |
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Synonyms: |
Ketone, Methyl 2-thiazolyl (7CI,8CI);1-(1,3-Thiazol-2-yl)ethan-1-one, 2-Ethanoyl-1,3-thiazole;THIAZOLE-2-ACETYL;1-(3-thiazol-3-iumyl)ethanone;2- acetylthiazoliuM;2-acetylthiazone;1-(1,3-Thiazol-2-yl)ethanone;1-(2-thiazolyl)-ethanon |
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CAS: |
24295-03-2 |
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MF: |
C5H5NOS |
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MW: |
127.16 |
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EINECS: |
246-134-5 |
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Product Categories: |
A-B;Alphabetical Listings;ACETYLGROUP;Sulphur Derivatives;Thiazoles;Flavors and Fragrances;thiazole Flavor;Building Blocks;Heterocyclic Building Blocks |
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Mol File: |
24295-03-2.mol |
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Melting point |
65.5°C |
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Boiling point |
89-91 °C12 mm Hg(lit.) |
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density |
1.227 g/mL at 25 °C(lit.) |
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FEMA |
3328 | 2-ACETYLTHIAZOLE |
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refractive index |
n20/D 1.548(lit.) |
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Fp |
173 °F |
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storage temp. |
Store below +30°C. |
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pka |
0.05±0.10(Predicted) |
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form |
Powder or Crystals |
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color |
White to slightly yellow |
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Specific Gravity |
1.23 |
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Sensitive |
Stench |
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JECFA Number |
1041 |
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BRN |
109803 |
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CAS DataBase Reference |
24295-03-2(CAS DataBase Reference) |
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NIST Chemistry Reference |
2-Acetylthiazole(24295-03-2) |
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EPA Substance Registry System |
Ethanone, 1-(2-thiazolyl)- (24295-03-2) |
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Hazard Codes |
Xn,Xi |
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Risk Statements |
22-36-43-36/37/38 |
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Safety Statements |
26-36/37-24/25-36 |
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RIDADR |
3334 |
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WGK Germany |
3 |
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F |
13 |
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Hazard Note |
Irritant/Stench |
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TSCA |
T |
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HazardClass |
STENCH |
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HS Code |
29341000 |
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Chemical Properties |
A colorless liquid with green onion, herbal, grassy odor. It is used as flavor enhancer and flavoring agent |
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Preparation |
By oxidation of the corresponding carbinol using dichromate |
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Aroma threshold values |
Detection at 4 ppb |
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Taste threshold values |
Taste characteristics at 30 ppm: corn chip with slightly musty background |
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Purification Methods |
Check NMR spectrum; if it is not too bad, distil it through an efficient column in a vacuum. The oxime sublimes at 140-145o, m 159o, and when crystallised from H2O has m 163-165.5o. [Erlenmeyer et al. Helv Chim Acta 31 1142 1948, Waisvisz et al. J Am Chem Soc 79 4524 1957, Menasseé et al. Helv Chim Acta 40 554 1957, Beilstein 27 IV 2617.] |
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Raw materials |
Ethyl acetate-->Diethyl ether-->Dichromate, Ion chromatography standard solution, Specpure, Cr2O7ˉ2 1000μg/ml |
