Butachlor

Butachlor is a herbicide of the acetanilide class. It is used as a selective pre-emergent herbicide to control annual grasses and some broad-leaved weeds. It was introduced circa 1970. It is extensively used in India in the form of granules and emulsifiable concentrate in rice as post emergence herbicide, and 2,699 tonnes (5,950,000 lb) was sold in India in 2005-06, declining to 372 tonnes (820,000 lb) in 2009-10. It is used in Uganda. Butachlor's herbicide mode of action is to prevent formation of very long chain fatty acids; this makes its HRAC classification Group K (Australia), Group K3 (global) and Group 15 (numeric).

Butachlor

Names
Preferred IUPAC name N-(Butoxymethyl)-2-chloro-N-(2,6-diethylphenyl)acetamide
Identifiers
CAS Number	23184-66-9 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:3230 Y
ChEMBL	ChEMBL1399036
ChemSpider	29376
ECHA InfoCard	100.041.328
EC Number	245-477-8
KEGG	C10931
PubChem CID	31677
UNII	94NU90OO5K
CompTox Dashboard (EPA)	DTXSID3034402
InChI InChI=1S/C17H26ClNO2/c1-4-7-11-21-13-19(16(20)12-18)17-14(5-2)9-8-10-15(17)6-3/h8-10H,4-7,11-13H2,1-3H3
SMILES ClCC(=O)N(c1c(cccc1CC)CC)COCCCC
Properties[1]
Chemical formula	C17H26ClNO2
Molar mass	311.85 g·mol−1
Appearance	Light yellow oil
Density	1.0695 g/cm3
Solubility in water	20 mg/L (20 °C)
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H317, H331, H410
Precautionary statements	P261, P264, P270, P271, P272, P273, P280, P301+P312, P302+P352, P304+P340, P311, P321, P330, P333+P313, P363, P391, P403+P233, P405, P501
Flash point	100 °C (212 °F; 373 K)[2]
Lethal dose or concentration (LD, LC):
LD50 (median dose)	1740 mg/kg (oral, rat)[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chemical compound

Not to be confused with butenachlor.

Butachlor is a herbicide of the acetanilide class.^[3] It is used as a selective pre-emergent herbicide^[1] to control annual grasses and some broad-leaved weeds. It was introduced circa 1970.^[4] It is extensively used in India in the form of granules and emulsifiable concentrate in rice as post emergence herbicide, and 2,699 tonnes (5,950,000 lb) was sold in India in 2005-06, declining to 372 tonnes (820,000 lb) in 2009-10.^[5]

It is used in Uganda.^[6]

Butachlor's herbicide mode of action is to prevent formation of very long chain fatty acids; this makes its HRAC classification Group K (Australia), Group K3 (global) and Group 15 (numeric).

Application

[edit]

Butachlor is typically applied at 1.25-2 kg/ha active ingredient.^[5]

References

[edit]

1. ^ ^{a b c} Merck Index, 11th Edition, 1498
2. ^ Butachlor at Sigma-Aldrich
3. ^ PPDB, retrieved 2019-10-03.
4. ^ PPDB, retrieved 1-2025-March
5. ^ ^{a b} Choudhury PP, Singh R, Ghosh D and Sharma AR. 2016. Herbicide Use in Indian Agriculture. ICAR - Directorate of Weed Research, Jabalpur, Madhya Pradesh, 110 p. https://dwr.icar.gov.in/Downloads/Information_Bulletin/Information%20Bulletin%20No%20-%2022%20-%20Herbicide%20Use%20in%20Indian%20Agriculture.pdf
6. ^ "Register of Agricultural Chemicals Registered" (PDF). Republic of Uganda Ministry of Agriculture Animal Industry and Fisheries. 16 December 2022. Retrieved 3 March 2026.

Links

[edit]

• Butachlor in the Pesticide Properties DataBase (PPDB)

This article about an organic compound is a stub. You can help Wikipedia by adding missing information.

• v
• t
• e