Cymoxanil

Description

Cymoxanil · CAS 166900-80-7 · C7H10N4O3. UNII QJO7SS7R8U. Melting Point: 160-161 °C; Solubility: In water, 890 mg/L at 20 °C; Density: 1.32 at 25 °C.

Identification

CAS Registry Number	166900-80-7
PubChem CID	5364079
Molecular formula	C7H10N4O3
IUPAC name	(1E)-2-(ethylcarbamoylamino)-N-methoxy-2-oxoethanimidoyl cyanide
UNII (FDA)	QJO7SS7R8U

Computed Descriptors

Molecular Weight	198.18
XLogP3	0.7
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	3
Exact Mass	198.07529019
Monoisotopic Mass	198.07529019
Topological Polar Surface Area	104
Heavy Atom Count	14
Formal Charge	0

Physical & Chemical Properties

Melting Point	160-161 °C
Solubility	In water, 890 mg/L at 20 °C
Density	1.32 at 25 °C
Vapor Pressure	0.00000113 [mmHg]
Vapor Pressure	1.13X10-6 mm Hg at 20 °C
LogP	0.59

Physical description & handling notes

• Colorless odorless solid; [HSDB]
• Colorless crystals
• Odorless
• Peach color; mp: 159-160 °C /Technical/
• Hexane: 1.85; toluene: 5.29; acetonitrile: 57; ethyl acetate: 28; n-octanol: 1.43; methanol: 22.9 g/L; acetone: 62.4 g/L; methylene chloride: 133.0 (all in g/L at 20 °C)
• log Kow = 0.67 (pH 7); 0.59 (pH 5)

GHS Hazard Classification

Reported hazard statements	H302, H317, H373, H400, H410, H361 (50.7%), H360

Documented Uses

• Used as agricultural fungicide (mainly for potato blight); [Merck Index]
• Foliar fungicide with protective and curative action. Has contact and local systemic activity, and also inhibits sporulation.
• Systemic compound that shows curative protectant activity against oomycetes, notably grape downy mildew and potato late blight.
• Cymoxanil is produced by condensation of cyanoacetic acid with ethylurea in the presence of acetic anhydride; the resulting 2-cyano-Nethylcarbamoyl acetamide is converted to the hydroximino derivative, which is methylated with dimethyl sulfate.
• Preparation: S.H. Davidson, US 3957847 (1976 to DuPont)
• Acetamide, 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)-: ACTIVE

Synonyms

CYMOXANIL; 57966-95-7; Curzate; 1-(2-Cyano-2-methoxyiminoacetyl)-3-ethylurea; Dpx 3217; QJO7SS7R8U; DPX-3217; 2-Cyano-N-(ethylcarbamoyl)-2-(methoxyimino)acetamide; TOSCA MZ; 2-Cyano-N-((ethylamino)carbonyl)-2-(methoxyimino)-acetamide; Acetamide, 2-cyano-N-((ethylamino)carbonyl)-2-(methoxyimino)-; Acetamide, 2-cyano-N-[(ethylamino)carbonyl]-2-(methoxyimino)-; CHEBI:81788; DTXSID6032358; 2-cyano-n-ethylcarbamoyl-2-methoxyiminoacetamide; 2-Cyano-N-((ethylamino)carbonyl)-2-(methoxyimino)acetamide

Frequently Asked Questions

What are the CAS number and molecular formula of Cymoxanil?

CAS 166900-80-7; molecular formula C7H10N4O3; molecular weight — g/mol.

What other names is Cymoxanil known by?

CYMOXANIL, 57966-95-7, Curzate, 1-(2-Cyano-2-methoxyiminoacetyl)-3-ethylurea, Dpx 3217, QJO7SS7R8U.

Is Cymoxanil classified as hazardous?

Hazard statements reported: H302, H317, H373, H400, H410.

What are the key physical properties of Cymoxanil?

Melting Point: 160-161 °C; Solubility: In water, 890 mg/L at 20 °C; Density: 1.32 at 25 °C; Vapor Pressure: 0.00000113 [mmHg].

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.