Hazard
Moderately toxic by ingestion. Low toxicity by inhalation and skin contact.
Potential Exposure
A quarternary ammonium salt herbicide and plant growth regulator registered solely for use on
cotton, to control growth and yield
First aid
If this chemical gets into the eyes, remove any
contact lenses at once and irrigate immediately for at least
15 minutes, occasionally lifting upper and lower lids. Seek
medical attention immediately. If this chemical contacts the
skin, remove contaminated clothing and wash immediately
with soap and water. Seek medical attention immediately.
If this chemical has been inhaled, remove from exposure,
begin rescue breathing (using universal precautions) if
breathing has stopped, and CPR if heart action has stopped.
Transfer promptly to a medical facility. When this chemical
has been swallowed, get medical attention. Give large
quantities of water and induce vomiting. Do not make an
unconscious person vomit
Shipping
UN3077 Environmentally hazardous substances,
solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required
Incompatibilities
Decomposes in temperatures above
320℃. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine,
fluorine, etc.); contact may cause fires or explosions. Keep
away from alkaline materials, strong bases, strong acids,
oxoacids, epoxides.
Chemical Properties
White crystalline solid, off-white powder, or
pinkish liquid. Slightly sweet, musty odor;
Waste Disposal
Do not discharge into drains
or sewers. Dispose of waste material as hazardous waste
using a licensed disposal contractor to an approved landfill.
Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Incineration with
effluent gas scrubbing is recommended. In accordance
with 40CFR165, follow recommendations for the disposal
of pesticides and pesticide containers. Noncombustible containers should be compacted and buried under more than
16 in/40 cm. of soil. Must be disposed properly by
following package label directions or by contacting your
local or federal environmental control agency, or by
contacting your regional EPA office.
Uses
Mepiquat Chloride is a plant growth regulator used to improve crop quality and maximize yield.
Uses
Plant growth regulator.
Definition
ChEBI: A quaternary ammonium salt consisting of equimolar amounts of mepiquat cations and chloride anions. A plant growth regulator, it is used in agriculture to reduce vegetative growth including sprout suppression in garlic, leeks and onions.
Production Methods
The industrial synthesis of mepiquat chloride begins with the preparation of N-methylpiperidine, which serves as the core nitrogen-containing ring. This intermediate undergoes quaternisation, a key step where it reacts with chloromethyl compounds such as methyl chloride or chloromethyl acetate under controlled temperature and pressure to form the quaternary ammonium salt, mepiquat chloride. The reaction is typically carried out in aqueous or polar organic solvents, and the product is isolated by crystallisation or solvent evaporation. Continuous production methods have been developed to improve efficiency and reduce waste, including inline monitoring and purification systems.
Agricultural Uses
Herbicide, Plant growth regulator: Registered solely for cotton, to control the growth
and yield.
Trade name
BAS 083 01 W®; BAS 85559X®;
MEPEX®; MEPICHLOR®; MEPPLUS®; PIX®;
PONNAX®; ROQUAT®; TERPAL® (with Ethephon)
Mechanism of action
Gibberellin biosynthesis inhibitor
Pesticide Type
Plant Growth Regulator
