Title: Dithiopyr
CAS Registry Number: 97886-45-8
CAS Name: 2-(Difluoromethyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-3,5-pyridinedicarbothioic acid S,S-dimethyl ester
Additional Names: S,S-dimethyl 2-(difluoromethyl)-4-isobutyl-6-trifluoromethyl-3,5-pyridinedicarbothioate
Manufacturers' Codes: MON-15100; MON-7200
Trademarks: Dimension (Dow AgroSci.)
Molecular Formula: C15H16F5NO2S2
Molecular Weight: 401.42
Percent Composition: C 44.88%, H 4.02%, F 23.66%, N 3.49%, O 7.97%, S 15.98%
Literature References: Selective herbicide for weed control in turfgrass and selected crops. Prepn: L. F. Lee, EP 133612; idem, US 4692184 (1985, 1987 both to Monsanto). Herbicidal properties: M. Fujiyama, S. Yamane, Shokubutsu no Kagaku Chosetsu 24, 49 (1989), C.A. 111, 227154n (1989).
Properties: Colorless, crystalline solid with faint odor, mp 65°. vapor pressure at 25°: 4 ´ 10-6 mm Hg. Soly in water (20°): 1.38 ppm. LD50 orally in rats: >5000 mg/kg (Fujiyama, Yamane).
Melting point: mp 65°
Toxicity data: LD50 orally in rats: >5000 mg/kg (Fujiyama, Yamane)
Use: Herbicide.
Dithiosalicylic Acid Ditiocarb Sodium Diuron Divicine Dixanthogen

Skeletal formula
Ball-and-stick model
CAS number 97886-45-8 YesY
PubChem 91757
ChemSpider 82855 YesY
KEGG C18826 YesY
Jmol-3D images Image 1
Molecular formula C15H16F5NO2S2
Molar mass 401.42 g/mol
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Dithiopyr is a chemical used as an preemergent herbicide used to prevent crabgrass seeds from sprouting in the spring.[1] Dithiopyr may alter microtubule polymerization and stability by "interacting with microtubule associated proteins and/or microtubule organizing centers rather than interaction directly with tubulin."[2]

It is an ingredient in many products including Dimension (herbicide) <sm>(a brand name)</sm> from Dow AgroSciences.[3]