Acesulfame potassium (ace-SUHL-faym), also known as acesulfame K (K is the symbol for potassium) or Ace K, is a calorie-free sugar substitute (artificial sweetener), and marketed under the trade names Sunett and Sweet One. In the European Union, it is known under the E number (additive code) E950.[1] It was discovered accidentally in 1967 by German chemist Karl Clauss at Hoechst AG (now Nutrinova).[2] In chemical structure, acesulfame potassium is the potassium salt of 6-methyl-1,2,3-oxathiazine-4(3H)-one 2,2-dioxide. It is a white crystalline powder with molecular formula C4H4KNO4S and a molecular weight of 201.24 g/mol.[3]
Starting at
IUPAC name
potassium 6-methyl-2,2-dioxo-2H-1,2λ6,3-oxathiazin-4-olate
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Other names
Acesulfame K Ace K
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CAS Number
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55589-62-3 |
ChEMBL | ChEMBL1351474 |
ChemSpider | 55940 |
EC Number | 259-715-3 |
Jmol interactive 3D | Image |
PubChem | 23683747 |
UNII | 23OV73Q5G9 |
InChI[show]
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SMILES[show]
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Chemical formula
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C4H4KNO4S |
Molar mass | 201.242 |
Appearance | white crystalline powder |
Density | 1.81 g/cm3 |
Melting point | 225 °C (437 °F; 498 K) |
Solubility in water
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270 g/L at 20 °C |
NFPA 704 |