Topramezone
Also known as: Impact, BAS 670, HSDB 7500, 1-methyl-4-(3-(4,5-dihydroisoxazol-3-yl)-2-methyl-4-methyl-sulfonylbenzoyl)-5-hydroxypyrazole, 4-[2-methyl-3-(4,5-dihydroisoxazol-3-yl)-4-methylsulfonylbenzoyl]-1-methyl-5-hydroxy-1H-pyrazole, 4-[3-(4,5-dihydro-1,2-oxazol-3-yl)-2-methyl-4-methylsulfonylbenzoyl]-2-methyl-1H-pyrazol-3-one, 4-[3-(4,5-dihydroisoxazol-3-yl)-2-methyl-4-methylsulfonyl-benzoyl]-1-methyl-5-hydroxy-1H-pyrazole, 4-[3-(4,5-dihydroisoxazol-3-yl)-4-methylsulfonyl-2-methylbenzoyl]-5-hydroxy-1-methylpyrazole, Methanone, [3-(4,5-dihydro-3-isoxazolyl)-2-methyl-4-(methylsulfonyl)phenyl](5-hydroxy-1-methyl-1H-pyrazol-4-yl)-, Topramezone Solution in Acetonitrile, 100μg/mL, [3-(4,5-Dihydro-1,2-oxazol-3-yl)-2-methyl-4-(methylsulfonyl)phenyl](5-hydroxy-1-methyl-1H-pyrazol-4-yl)methanone, [3-(4,5-Dihydro-3-isoxazolyl)-2-methyl-4-(methylsulfonyl)phenyl](5-hydroxy-1-methyl-1H-pyrazol-4-yl)methanone, [3-(4,5-dihydro-1,2-oxazol-3-yl)-4-(methanesulfonyl)-2-methylphenyl](5-hydroxy-1-methyl-1H-pyrazol-4-yl)methanone, [3-(4,5-dihydro-1,2-oxazol-3-yl)-4-mesyl-o-tolyl](5-hydroxy-1-methyl-1H-pyrazole-4-yl)methanone, [3-(4,5-dihydro-1,2-oxazol-3-yl)-4-mesyl-o-tolyl](5-hydroxy-1-methylpyrazol-4-yl)methanone
Topramezone (CAS 210631-68-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C16H17N3O5S and a molecular weight of 363.388 g/mol. Key properties include a boiling point of 590.5±60.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 310.9±32.9 °C. It is classified under GHS with signal word Danger and hazard statements H360 — May damage fertility or the unborn child and H410 — Very toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 210631-68-8
- Jingsj CID
- J-1973585-8
- Molecular Formula
- C16H17N3O5S
- Molecular Weight
- 363.388 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 590.5±60.0 °C at 760 mmHg |
|---|---|
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 310.9±32.9 °C |
| Exact Mass | 363.088898 |
| PSA | 119.23000 |
| LogP | 0.96 |
| Vapor Pressure | 0.0±1.7 mmHg at 25°C |
| Refractive Index | 1.670 |
GHS Safety & Compliance
- H360 — May damage fertility or the unborn child
- H410 — Very toxic to aquatic life with long lasting effects
Activity & Biological Data
| Additional Information | [1]. Zhao F, et al. Evaluation of the toxicity of herbicide topramezone to Chlorella vulgaris: Oxidative stress, cell morphology and photosynthetic activity. Ecotoxicol Environ Saf. 2017 Sep. 143:129-135. [2]. Grossmann K, et al. On the mechanism of action and selectivity of the corn herbicide topramezone: a new inhibitor of 4-hydroxyphenylpyruvate dioxygenase. Pest Manag Sci. 2007 May. 63(5):429-39. |
|---|
Frequently Asked Questions
What is the CAS number of Topramezone?
The CAS number of Topramezone is 210631-68-8.
What are the molecular formula and molecular weight of Topramezone?
Topramezone has molecular formula C16H17N3O5S and molecular weight 363.388 g/mol.
Is Topramezone hazardous?
Topramezone has GHS signal word Danger and hazard statements H360 — May damage fertility or the unborn child; H410 — Very toxic to aquatic life with long lasting effects.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Topramezone (CAS 210631-68-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1973585-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.