Description

Swep CAS NO 1918-18-9 is a selective carbamate herbicide known for its pre- and early post-emergence activity. It is valued for its effectiveness in controlling a broad spectrum of annual grasses and broadleaf weeds in various crops. This product is essential for agricultural professionals and formulators seeking reliable weed management solutions to protect crop yield and quality.

Application

• Selective Herbicide in Rice Cultivation: Primarily used for pre-emergence and early post-emergence control of barnyard grass, sedges, and other weeds in paddy fields.
• Crop Protection in Vegetables: Applied in fields for onions, garlic, and other bulb vegetables to manage competing weed species.
• Turf and Ornamental Management: Used in non-crop areas, turfgrass, and ornamental plantings for selective weed suppression.
• Industrial Vegetation Control: Employed in utility rights-of-way, fence lines, and other industrial sites for vegetation management.
• Formulation Intermediate: Serves as a key technical-grade active ingredient (TGAI) for the manufacturing of various emulsifiable concentrate (EC) and wettable powder (WP) herbicide formulations.

Basic Information

Product Name	Swep
CAS No.	1918-18-9
Molecular Formula	C9H9Cl2NO2
Molecular Weight	234.08 g/mol
Synonyms	Swep; Methyl 3,4-dichlorocarbanilate; 3',4'-Dichloromethylcarbanilate; Methyl N-(3,4-dichlorophenyl)carbamate; Caswell No. 312; CIPC; Chlorpropham (Note: Chlorpropham is a related but distinct compound with CAS 101-21-3, often confused); Herbicide 221
EINECS	217-632-1

Quality Control

Our technical-grade Swep (CAS 1918-18-9) is manufactured under a strict quality management system. Every batch is analyzed to confirm identity, potency, and impurity profiles, ensuring it meets the high standards required for agrochemical formulations. A Certificate of Analysis (COA) detailing specifications such as assay, moisture content, and relevant impurities is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from heat sources and incompatible materials. The recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to minimize moisture absorption and degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Melting Point	112°C - 116°C
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 3.0% Any single impurity ≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.