Pendimethalin

Description

Pendimethalin · CAS 40487-42-1 · C13H19N3O4. UNII VL6L14C06U. Melting Point: 56-57 °C; Solubility: In water, 0.33 mg/L at 20 °C; Density: 1.19 at 25 °C.

Identification

CAS Registry Number	40487-42-1
PubChem CID	38479
Molecular formula	C13H19N3O4
IUPAC name	3,4-dimethyl-2,6-dinitro-N-pentan-3-ylaniline
UNII (FDA)	VL6L14C06U

Computed Descriptors

Molecular Weight	281.31
XLogP3	5.2
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	4
Exact Mass	281.13755610
Monoisotopic Mass	281.13755610
Topological Polar Surface Area	104
Heavy Atom Count	20
Formal Charge	0

Physical & Chemical Properties

Melting Point	56-57 °C
Solubility	In water, 0.33 mg/L at 20 °C
Density	1.19 at 25 °C
Vapor Pressure	0.00003 [mmHg]
Vapor Pressure	9.4X10-6 mm Hg at 25 °C
LogP	log Kow = 5.20
LogP	4.78
Collision Cross Section	161.6 Ų [M+H]+
Collision Cross Section	186.6 Ų [M+Na]+
Collision Cross Section	166.9 Ų [M-H]-

Physical description & handling notes

• Pendimethalin appears as orange-yellow crystals. Non corrosive. Used as an herbicide.
• Orange-yellow solid; [Merck Index] Odor like fruit; [HSDB]
• Orange-yellow crystal solid
• Faint, nutty odor
• Decomposes on distillation
• Flashpoint of Prowl: 92 °F (closed cup); 124 °F (open cup) /Prowl/

GHS Hazard Classification

Reported hazard statements	H400, H410, H302 (12.8%), H317 (80.8%), H351, H361, H372

Documented Uses

• Used as selective pre- and post-emergence herbicide for field corn, potatoes, rice, sorghum, cotton, soybeans, tobacco, peanuts, and sunflowers; [HSDB] Workers may be exposed in food, feed, ornamental, turf, and right-of-way treatments; [Reference #1]
• Pendimethalin is a selective herbicide registered for control of broadleaf weeds and grassy weed species on a variety of agricultural crops, turf, and ornamentals. Pendimethalin disrupts the process of mitosis in the growth of shoots and roots. It acts as a microtubule disruptor by inhibiting cell division and cell elongation in plants, and is generally applied early in the growing season. Absorption of the herbicide takes place at the roots and the shoots.
• Pendimethalin is a selective herbicide used to control most annual grasses and certain broadleaf weeds in field corn, potatoes, rice, cotton, soybeans, tobacco, peanuts and sunflowers. It is used both preemergence, that is before weed seeds have sprouted, and early postemergence (A183).
• Information on 12 consumer products that contain Pendimethalin in the following categories is provided:
• ... Obtained from 3,4-xylidine by alkylation and dinitration.
• Pendimethalin is eliminated from body with 70% being excreted in feces, primarily parent compound, and 20% in urine within 24 hr /in rats/.

Synonyms

PENDIMETHALIN; 40487-42-1; Pendimethaline; Penoxaline; Prowl; Phenoxalin; Herbadox; Accotab; Stomp; Penoxyn; Sipaxol; 3,4-Dimethyl-2,6-dinitro-N-(pentan-3-yl)aniline; Way Up; Tendimethalin; Go-Go-San; Wayup

Frequently Asked Questions

What are the CAS number and molecular formula of Pendimethalin?

CAS 40487-42-1; molecular formula C13H19N3O4; molecular weight — g/mol.

What other names is Pendimethalin known by?

PENDIMETHALIN, 40487-42-1, Pendimethaline, Penoxaline, Prowl, Phenoxalin.

Is Pendimethalin classified as hazardous?

Hazard statements reported: H400, H410, H302, H317, H351.

What are the key physical properties of Pendimethalin?

Melting Point: 56-57 °C; Solubility: In water, 0.33 mg/L at 20 °C; Density: 1.19 at 25 °C; Vapor Pressure: 0.00003 [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.