Dicamba TC, SG, SL

Dicamba TC, SL

DICAMBA TECHNICAL MATERIAL

FAO Specification 85/TC (November 2023*)

This specification, which is PART ONE of this publication, is based on an evaluation of data submitted by the manufacturers whose names are listed in the evaluation reports (85/2001, 85/2016 & 85/2023). It should be applicable to TC produced by these manufacturers but it is not an endorsement of those products, nor a guarantee that they comply with the specification. The specification may not be appropriate for TC produced by other manufacturers. The evaluation reports (85/2001, 85/2016 & 85/2023), as PART TWO, form an integral part of this publication.

1 Description

The material shall consist of dicamba, together with related manufacturing impurities, in the form of grey to tan coloured lumps, flakes, granules or powder, free from visible extraneous matter and added modifying agents.

2 Active Ingredient

2.1 Identity tests (CIPAC 85/TC/M/2, Handbook K, p. 33, 2003)

The active ingredient shall comply with an identity test and, where the identity remains in doubt, shall comply with at least one additional test.

2.2 Dicamba content (CIPAC 85/TC/M/3, Handbook K, p. 33, 2003)

The dicamba content shall be declared (not less than 850 g/kg) and, when determined, the average measured content shall not be lower than the declared minimum content.

DICAMBA WATER SOLUBLE GRANULES

FAO Specification 85/SG (December 2016*)

This specification, which is PART ONE of this publication, is based on an evaluation of data submitted by the manufacturer whose name is listed in the evaluation reports (85/2001). It should be applicable to relevant products of this manufacturer but it is not an endorsement of those products, nor a guarantee that they comply with the specification. The specification may not be appropriate for the products of other manufacturers. The evaluation report (85/2001), as PART TWO, forms an integral part of this publication.

1 Description

The material shall consist of granules containing technical dicamba, complying with the requirements of the FAO specification 85/TC (November 2023), in the form of dicamba sodium salt, together with carriers and any other necessary formulants. It shall be homogeneous, free from visible extraneous matter and/or hard lumps, free flowing, and nearly dust free or essentially non-dusty. The active ingredient shall be soluble in water. Insoluble carriers and formulants shall not interfere with compliance with clause 3.2.

2 Active Ingredient

2.1 Identity tests (CIPAC 85/WG/M/2, Handbook K, p. 36, 2003) (Note 1)

The active ingredient shall comply with an identity test and, where the identity remains in doubt, shall comply with at least one additional test.

2.2 Dicamba content (CIPAC 85/WG/M/3, Handbook K, p. 36, 2003) (Note 1)

The dicamba content shall be declared (g/kg) and, when determined, the average content measured shall not differ from that declared by more than the following tolerances: Declared content in g/kg Tolerance

above 25 up to 100 ± 10 % of the declared content

above 100 up to 250 ± 6 % of the declared content

above 250 up to 500 ± 5 % of the declared content

above 500 ± 25 g/kg

Note: In each range the upper limit is included.

3 Physical properties

3.1 pH range (MT 75.3, CIPAC Handbook J, p. 131, 2000)

pH range: 5 to 10

3.2 Degree of dissolution and solution stability (MT 179.1, CIPAC Handbook O, p. 189, 2017)

Residue of formulation retained on a 75 μm test sieve after dissolution in CIPAC standard water D at 25 ± 5°C (Note 2).

Maximum: 2 % after 5 min.

Maximum: 2 % after 24 h.

3.3 Persistent foam (MT 47.3, CIPAC Handbook O, p. 177, 2017)

Maximum 30 ml after 1 min.

3.4 Dustiness (MT 171.1, CIPAC Handbook P, p. 235, 2021) (Note 3)

The formulation shall have a maximum collected dust of 30 mg by the gravimetric method.

3.5 Flowability (MT172.2, CIPAC Handbook P, p. 241, 2021) (Note 4)

At least 99 % of the formulation shall pass through a 5 mm test sieve after 20 drops of the sieve.

4 Storage stability

4.1 Stability at elevated temperatures (MT 46.4, CIPAC Handbook P, p.232, 2021)

After storage at 54 ± 2 °C for 14 days the determined average active ingredient content shall not be lower than 95 % relative to the determined average content found before storage (Note 5) and the formulation shall continue to comply with the clauses for:

-pH range (3.1),

-degree of dissolution and solution stability (3.2),

-dustiness (3.4).

DICAMBA SOLUBLE CONCENTRATE

FAO Specification 85/SL (December 2016*)

This specification, which is PART ONE of this publication, is based on an evaluation of data submitted by the manufacturer whose name is listed in the evaluation reports (85/2001). It should be applicable to relevant products of this manufacturer but it is not an endorsement of those products, nor a guarantee that they comply with the specification. The specification may not be appropriate for the products of other manufacturers. The evaluation report (85/2001), as PART TWO, forms an integral part of this publication.

1 Description

The material shall consist of technical dicamba, complying with the requirements of FAO specification 85/TC (December 2023), in the form of dicamba dimethylammonium, potassium or sodium salt, dissolved in suitable solvents, together with any other necessary formulants. It shall be in the form of a clear or opalescent liquid, free from visible suspended matter and sediment, to be applied as a true solution of the active ingredient in water.

2 Active Ingredient

2.1 Identity tests (CIPAC 85/SL/M/2, Handbook K, p. 35, 2003)

The active ingredient shall comply with an identity test and, where the identity remains in doubt, shall comply with at least one additional test.

2.2 Dicamba content (CIPAC 85/SL/M/3, Handbook K, p. 35, 2003)

The dicamba content shall be declared (g/kg or g/l at 20 ± 2oC, Note 1) and, when determined, the average content measured shall not differ from that declared by more than the following tolerances: Declared content in g/kg Tolerance

above 25 up to 100 ± 10 % of the declared content

above 100 up to 250 ± 6 % of the declared content

above 250 up to 500 ± 5 % of the declared content

above 500 ± 25 g/kg

Note: In each range the upper limit is included.

3 Physical properties

3.1 pH range (MT 75.3, CIPAC Handbook J, p. 131, 2000)

pH range: 5 to 10

3.2 Dilution stability (MT 41.1, CIPAC Handbook O, p. 174, 2017) (Note 2)

The formulation, following dilution with CIPAC standard water D and standing at 30 ± 2°C for 24 h, shall give a clear or opalescent solution, free from more than a trace of sediment and visible solid particles. Any visible sediment or particles produced shall pass through a 75 μm test sieve.

3.3 Persistent foam (MT 47.3, CIPAC Handbook O, p. 177, 2017)

Maximum 30 ml after 1 min.

4 Storage stability

4.1 Stability at 0oC (MT 39.3, CIPAC Handbook J, p.126, 2000)

After storage at 0 ± 2 °C for 7 days, the volume of solid and/or liquid which separates shall not be more than 0.3 ml.

4.2 Stability at elevated temperatures (MT 46.4, CIPAC Handbook P, p.232, 2021)

After storage at 54 ± 2 °C for 14 days the determined average active ingredient content shall not be lower than 95 % relative to the determined average content found before storage (Note 3) and the formulation shall continue to comply with the clauses for:

-pH range (3.1),

-dilution stability (3.2).