灭草烟酸

Description

Imazapyr acid · CAS 81334-34-1 · C13H15N3O3. UNII 787MX0M5A6. Melting Point: 171 °C; Density: 0.34 g/mL; Vapor Pressure: VP: <0.013 mPa at 60 °C.

Identification

CAS Registry Number	81334-34-1
PubChem CID	54738
Molecular formula	C13H15N3O3
IUPAC name	2-(4-methyl-5-oxo-4-propan-2-yl-1H-imidazol-2-yl)pyridine-3-carboxylic acid
UNII (FDA)	787MX0M5A6

Computed Descriptors

Molecular Weight	261.28
XLogP3	1.2
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	3
Exact Mass	261.11134135
Monoisotopic Mass	261.11134135
Topological Polar Surface Area	91.7
Heavy Atom Count	19
Formal Charge	0

Physical & Chemical Properties

Melting Point	171 °C
Density	0.34 g/mL
Vapor Pressure	VP: <0.013 mPa at 60 °C
LogP	log Kow = 0.22
LogP	0.22
Dissociation Constants	pKa = 1.81
Collision Cross Section	175 Ų [M+Na]+
Collision Cross Section	164.4 Ų [M-H]-
Collision Cross Section	156.8 Ų [M+H]+

Physical description & handling notes

• White to tan powder; Aqueous solution: clear pale yellow to dark green liquid; [HSDB]
• Clear, slightly viscous, pale yellow to dark green aqueous liquid
• White to tan powder
• Crystals from acetone + hexane
• Slight ammonical odor
• Slight odor of acetic acid

GHS Hazard Classification

Reported hazard statements	H319, H412, H400 (49.5%), H318, H410

Documented Uses

• Used as non-selective, pre- and post-emergent herbicide applied as either the acid or isopropylamine salt; Registered for use on corn, grass, and a variety of commercial and residential use sites; [Reference #1]
• Imazapyr is a systemic, non-selective herbicide used for the pre- and post-emergence control of a broad range of weeds, including terrestrial annual and perennial grasses, broad-leaved herbs, woody species, and riparian and emergent aquatic species. ... Imazapyr may be used in a variety of agricultural, commercial, and residential settings. Use sites include corn, forestry sites, rights-of-way, fence rows, hedge rows, drainage systems, outdoor industrial areas, outdoor buildings and structures, domestic dwellings,
• Information on 6 consumer products that contain Imazapyr in the following categories is provided:
• 2,3-Pyridinedicarboxylic acid undergoes dehydration (to form the anhydride), a condensation reaction, hydrolysis, is cyclized (to form the imidazolinone ring), and is precipitated as the manufacturing use product.
• Imazapyr is produced by reaction of 2,3-dicarboxymethylpyridine with 2-aminoamide-3-methylbutane in the presence of two equivalents of tert-butoxide.
• Imazapyr technical was first registered in 1985; however, a non-crop end use product had been previously registered in July 1984. The first food use on corn was registered in April 1997. In 2003, the aquatic and grassland uses were registered which resulted in the establishment of additional tolerances.

Synonyms

Imazapyr; 81334-34-1; Charper; Arsenal 250A; (+-)-Imazapyr; DTXSID8034665; 2-(4-Isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)nicotinic acid; 787MX0M5A6; AC 243,997; 3-Pyridinecarboxylic acid, 2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl)-; DTXCID6014665; 2-(4,5-Dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl)-3-pyridinecarboxylic acid; 3-Pyridinecarboxylic acid, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-; 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1h-imidazol-2-yl]-3-pyridinecarboxylic acid; 2-(5-methyl-4-oxo-5-(propan-2-yl)-4,5-dihydro-1H-imidazol-2-yl)pyridine-3-carboxylic acid; 2-[5-methyl-4-oxo-5-(propan-2-yl)-4,5-dihydro-1H-imidazol-2-yl]pyridine-3-carboxylic acid

Frequently Asked Questions

What are the CAS number and molecular formula of Imazapyr acid?

CAS 81334-34-1; molecular formula C13H15N3O3; molecular weight — g/mol.

What other names is Imazapyr acid known by?

Imazapyr, 81334-34-1, Charper, Arsenal 250A, (+-)-Imazapyr, DTXSID8034665.

Is Imazapyr acid classified as hazardous?

Hazard statements reported: H319, H412, H400, H318, H410.

What are the key physical properties of Imazapyr acid?

Melting Point: 171 °C; Density: 0.34 g/mL; Vapor Pressure: VP: <0.013 mPa at 60 °C; LogP: log Kow = 0.22.

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.