Ioxynil

Description

Ioxynil · CAS 1689-83-4 · C7H3I2NO. UNII 8Y734M4V9E. Melting Point: 212-213 °C; Vapor Pressure: 0.00000014 [mmHg]; Vapor Pressure: Less than 1 mPa at 20 °C.

Identification

CAS Registry Number	1689-83-4
PubChem CID	15530
Molecular formula	C7H3I2NO
IUPAC name	4-hydroxy-3,5-diiodobenzonitrile
UNII (FDA)	8Y734M4V9E

Computed Descriptors

Molecular Weight	370.91
XLogP3	2
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	370.83041
Monoisotopic Mass	370.83041
Topological Polar Surface Area	44
Heavy Atom Count	11
Formal Charge	0

Physical & Chemical Properties

Melting Point	212-213 °C
Vapor Pressure	0.00000014 [mmHg]
Vapor Pressure	Less than 1 mPa at 20 °C
LogP	3.51
LogP	3.8
Dissociation Constants	PK: 3.96
Collision Cross Section	133.06 Ų [M-H]-

Physical description & handling notes

• Colorless odorless solid; [ICSC] Technical product is cream solid; Decomposed by sunlight and ultraviolet light; [HSDB] Powder; [MSDSonline]
• ODOURLESS COLOURLESS CRYSTALS.
• Colorless crystalline solid
• Faint phenolic /tech grade/
• Odorless when pure
• Sublimes at circa 140 °C/0.1 mm Hg

GHS Hazard Classification

Reported hazard statements	H301, H312, H319, H331, H373, H400, H410, H361 (61.3%)

Documented Uses

• Used as selective contact herbicide for post-emergence control of many annual broad-leaved weeds in cereals, onions, flax, sugar cane, forage grasses, lawns, and freshly sown turf; Also used as a molluscicide; Not marketed in the US; Produced by Rhone-Poulenc in New Zealand (Axall), Ireland (Brottox), and Ethiopia and Kenya (Maytril); [HSDB]
• Selective contact herbicide with some systemic activity. Absorbed by the foliage...used for post-emergence control of a wide range of annual broad-leaved weeds, especially young seedlings of the Polygonaceae, Compositae, and Boraginaceae, in cereals, onions, leeks, garlic, shallots, flax, sugar cane, forage grasses, lawns, and newly-sown turf.
• /IT IS USED FOR/ POST-EMERGENCE CONTROL FOR SEEDLING WEEDS (BINDWEED, SMARTWEED, BUTTERCUPS, CHICKWEED, CORNFLOWER, DANDELION, FAT HEN, GROUNDSEL, MAYWEEDS, MUSTARDS, PLANTAINS, SHEPHERDSPURSE, SPEEDWELLS, ETC) IN CEREALS. BELGRAN, CERTROL DS FOR SUGAR CANE. ACTRIL DS FOR SUGARCANE, CITRUS, RICE, AND OIL PALM. IOTOX FOR SPORTS TURF.
• Herbicides, Transformation products
• ...BY IODINATION OF 4-HYDROXYBENZALDEHYDE, CONVERSION TO OXIME, TO ACETATE & HYDROLYSIS TO NITRILE.
• Not marketed in the United States

Synonyms

Ioxynil; 4-Hydroxy-3,5-diiodobenzonitrile; 1689-83-4; Actril; Bentrol; 3,5-Diiodo-4-hydroxybenzonitrile; Trevespan; Certrol; Actrilawn; Cipotril; Joxynil; Loxynil; Iotox; Benzonitrile, 4-hydroxy-3,5-diiodo-; 2,6-Diiodo-4-cyanophenol; BANTROL

Frequently Asked Questions

What are the CAS number and molecular formula of Ioxynil?

CAS 1689-83-4; molecular formula C7H3I2NO; molecular weight — g/mol.

What other names is Ioxynil known by?

Ioxynil, 4-Hydroxy-3,5-diiodobenzonitrile, 1689-83-4, Actril, Bentrol, 3,5-Diiodo-4-hydroxybenzonitrile.

Is Ioxynil classified as hazardous?

Hazard statements reported: H301, H312, H319, H331, H373.

What are the key physical properties of Ioxynil?

Melting Point: 212-213 °C; Vapor Pressure: 0.00000014 [mmHg]; Vapor Pressure: Less than 1 mPa at 20 °C; LogP: 3.51.

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.