Diuron

Description

Diuron · CAS 330-54-1 · C9H10Cl2N2O. UNII 9I3SDS92WY. Boiling Point: 356 to 374 °F at 760 mmHg (USCG, 1999); Boiling Point: Decomposes at 180-190 °C; Melting Point: 318.2 °F (USCG, 1999).

Identification

CAS Registry Number	330-54-1
PubChem CID	3120
Molecular formula	C9H10Cl2N2O
IUPAC name	3-(3,4-dichlorophenyl)-1,1-dimethylurea
UNII (FDA)	9I3SDS92WY

Computed Descriptors

Molecular Weight	233.09
XLogP3	2.7
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	1
Exact Mass	232.0170183
Monoisotopic Mass	232.0170183
Topological Polar Surface Area	32.3
Heavy Atom Count	14
Formal Charge	0

Physical & Chemical Properties

Boiling Point	356 to 374 °F at 760 mmHg (USCG, 1999)
Boiling Point	Decomposes at 180-190 °C
Melting Point	318.2 °F (USCG, 1999)
Melting Point	158-159 °C
Melting Point	MP: 159 °C. Decomposes at 180 °C
Melting Point	316 °F
Solubility	0.004 % (NIOSH, 2024)
Solubility	In water, 42.0 mg/L at 25 °C
Solubility	In water, 37.4 mg/L at 25 °C
Solubility	0.004%

Physical description & handling notes

• Diuron is a white crystalline solid. It is a wettable powder. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. It can cause illness by inhalation, skin absorption and/or ingestion. It is used as a herbicide.
• Wet Solid; Dry Powder
• White, odorless, crystalline solid. [herbicide]; [NIOSH]
• White, odorless, crystalline solid.
• White, odorless, crystalline solid. [herbicide]
• White, crystalline solid

Regulatory Status

GHS notification summary	0.1% (1 / 739)

GHS Hazard Classification

GHS notification summary	0.1% (1 / 739)
Reported hazard statements	H350, H373, H400, H410, H302 (99.9%), H351 (99.9%), H372, H335

Documented Uses

• A photosynthesis inhibitor, diuron is used for general weed control and to kill emerging weeds in sugarcane, citrus, pineapple, cotton, and asparagus crops. [ACGIH]
• N'-(3,4-Dichlorophenyl)-N,N-dimethylurea, diuron is a broad-spectrum algicide, which acts by interrupting the photosynthetic electron transport in algae. The main applications are paints, coatings and plasters. In practice, dry-film preservatives contain a combination of algicides and fungicides, such as diuron, carbendazim and OIT /2-n-octylisothiazol-3-one/, or diuron, zinc pyrithione and OIT.
• Systemic herbicide. Total control of weeds and mosses on non-crop areas. Selective control of germinating grass and broad-leaved weeds in many crops, including asparagus, tree fruit, bush fruit, citrus fruit, vines, olives, pineapples, bananas, sugar cane, cotton, peppermint, alfalfa, forage legumes, cereals, maize, sorghum, and perennial grass-seed crops.
• Pre-emergence herbicide, sugar cane flowering suppressant.
• For more Uses (Complete) data for Diuron (7 total), please visit the HSDB record page.
• Information on 1 consumer products that contain Diuron in the following categories is provided:

Synonyms

diuron; 330-54-1; 3-(3,4-Dichlorophenyl)-1,1-dimethylurea; DCMU; Duran; Dichlorfenidim; Karmex; Dynex; Vonduron; Dailon; Marmer; Karmex DW; Di-on; Urox D; Cekiuron; Crisuron

Frequently Asked Questions

What are the CAS number and molecular formula of Diuron?

CAS 330-54-1; molecular formula C9H10Cl2N2O; molecular weight — g/mol.

What other names is Diuron known by?

diuron, 330-54-1, 3-(3,4-Dichlorophenyl)-1,1-dimethylurea, DCMU, Duran, Dichlorfenidim.

Is Diuron classified as hazardous?

0.1% of GHS notifications report no hazard classification (1 of 739).

What are the key physical properties of Diuron?

Boiling Point: 356 to 374 °F at 760 mmHg (USCG, 1999); Boiling Point: Decomposes at 180-190 °C; Melting Point: 318.2 °F (USCG, 1999); Melting Point: 158-159 °C.

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.