Hymexazol
Hymexazol is a member of the class of isoxazoles carrying hydroxy and methyl substituents at positions 3 and 5 respectively. It is used worldwide as a systemic soil and seed fungicide for the control of diseases caused by Fusarium, Aphanomyces, Pythium, and Corticium spp. in rice, sugarbeet, fodderbeet, vegetables, cucurbits, and ornamentals. It has a role as an antifungal agrochemical. It is a member of isoxazoles and a heteroaryl hydroxy compound. — ChEBI
- IUPAC name
- 5-methyl-1,2-oxazol-3-one
- Molecular formula
- C4H5NO2
- Molecular weight
- 99.09 g/mol
- Exact mass
- 99.032028402 Da
- XLogP3
- 0.1
- Topological polar surface area
- 38.3 Ų
- Hydrogen-bond donors
- 1
- Hydrogen-bond acceptors
- 2
- Covalent units
- 1
- Defined stereocentres
- 0
Also known as
16 more reported names
External database identifiers
- ChEBI:CHEBI:5827
- ChEMBL:CHEMBL244877
- EPA DTXSID:DTXSID3032622
- PubMed:11408205
Evidence from additional scientific databases
EMBL-EBI ChEBI
hymexazol
A member of the class of isoxazoles carrying hydroxy and methyl substituents at positions 3 and 5 respectively. It is used worldwide as a systemic soil and seed fungicide for the control of diseases caused by Fusarium, Aphanomyces, Pythium, and Corticium spp. in rice, sugarbeet, fodderbeet, vegetables, cucurbits, and ornamentals.
- Formula
- C4H5NO2
- Average mass
- 99.089 g/mol
- Monoisotopic mass
- 99.03203 Da
- Formal charge
- 0
- heteroaryl hydroxy compound — is a (CHEBI:74818)
- isoxazoles — is a (CHEBI:55373)
- antifungal agrochemical — has role (CHEBI:86328)
- antifungal agrochemical — has role (CHEBI:86328)
- heteroaryl hydroxy compound — is a (CHEBI:74818)
- isoxazoles — is a (CHEBI:55373)
Additional curated names
Cross-references from this source
- CAS: 10004-44-1 — KEGG COMPOUND
- CAS: 10004-44-1 — ChemIDplus
- MANUAL_X_REF: 388 — PPDB
- MANUAL_X_REF: C11103 — KEGG COMPOUND
- MANUAL_X_REF: hymexazol — Alan Wood's Pesticides
- REGISTRY_NUMBER: 606046 — Reaxys
Mapped by: Exact CAS cross-reference in the ChEBI compound record. Source updated: 2015-07-07. Retrieved: 2026-08-31. Open source record
NIH PubChem PUG-View
Attributed physical-property, hazard, environmental and use annotations.
- Signal: Danger Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
- GHS Hazard Statements: H302: Harmful if swallowed [Warning Acute toxicity, oral]; H317: May cause an allergic skin reaction [Warning Sensitization, Skin]; H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]; H361d: Suspected of damaging the unborn child [Warning Reproductive toxicity]; H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
- Precautionary Statement Codes: P203, P261, P264, P264+P265, P270, P272, P273, P280, P301+P317, P302+P352, P305+P354+P338, P317, P318, P321, P330, P333+P317, P362+P364, P391, P405, and P501 (click each P-code to see the statement) Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
- Signal: Danger Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]; H317 (47.7%): May cause an allergic skin reaction [Warning Sensitization, Skin]; H318 (98.9%): Causes serious eye damage [Danger Serious eye damage/eye irritation]; H361 (14.8%): Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]; H361d (33%): Suspected of damaging the unborn child [Warning Reproductive toxicity]; H411 (47.7%): Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]; H412 (51.1%): Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
- Precautionary Statement Codes: P203, P261, P264, P264+P265, P270, P272, P273, P280, P301+P317, P302+P352, P305+P354+P338, P317, P318, P321, P330, P333+P317, P362+P364, P391, P405, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 88 reports by companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- Signal: Danger Source: Hazardous Chemical Information System (HCIS), Safe Work Australia
- GHS Hazard Statements: H302: Harmful if swallowed [Warning Acute toxicity, oral]; H317: May cause an allergic skin reaction [Warning Sensitization, Skin]; H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]; H361d: Suspected of damaging the unborn child [Warning Reproductive toxicity]; H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: Hazardous Chemical Information System (HCIS), Safe Work Australia
- Precautionary Statement Codes: P203, P261, P264, P264+P265, P270, P272, P273, P280, P301+P317, P302+P352, P305+P354+P338, P317, P318, P321, P330, P333+P317, P362+P364, P391, P405, and P501 (click each P-code to see the statement) Source: Hazardous Chemical Information System (HCIS), Safe Work Australia
Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|---|---|
| EMBL-EBI ChEBI | Exact match | 2026-08-31 |
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.