Chlorothalonil TC, WP, WDG, SC

Chlorothalonil TC, WP, WDG, SC

CHLOROTHALONIL TECHNICAL MATERIAL

FAO Specification 288/TC (September 2024)

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 (288/2004, 288/2005, 288/2007, 288/2014, 288/2019.1, 288/2019.2 & 288/2024). 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 (288/2004, 288/2005, 288/2007, 288/2014, 288/2019.1, 288/2019.2 & 288/2024), as PART TWO, form an integral part of this publication.

1. Description

The material shall consist of chlorothalonil together with related manufacturing impurities, in the form of an off-white powder, free from visible extraneous matter and added modifying agents.

2. Active ingredient

2.1 Identity tests (CIPAC 288/TC/(M)/2, CIPAC Handbook K, p.14, 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 Chlorothalonil (CIPAC 288/TC/(M)/3, CIPAC Handbook K, p.14, 2003)

The chlorothalonil content shall be declared (not less than 985 g/kg) and when determined, the average measured content shall not be lower than the declared minimum content.

3. Relevant impurities

3.1 Hexachlorobenzene (Note 1)

Maximum: 0.04 g/kg.

3.2 Decachlorobiphenyl (Note 1)

Maximum: 0.03 g/kg.

CHLOROTHALONIL WETTABLE POWDER

FAO Specification 288/WP (September 2024)

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 (288/2004, 288/2005, 288/2007). It should be applicable to wettable powders of these manufacturers, and those of any other formulators who use only TC from the evaluated sources. The specification 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 who use TC from other sources. The evaluation reports (288/2004, 288/2005, 288/2007), as PART TWO, form an integral part of this publication.

1. Description

The material shall consist of a homogeneous mixture of technical chlorothalonil, complying with the requirements of FAO specification 288/TC (September 2024), together with filler(s) and any other necessary formulants. It shall be in the form of a fine powder free from visible extraneous matter and hard lumps.

2. Active Ingredient

2.1 Identity tests (CIPAC 288/WP/(M)/2, CIPAC Handbook K, p.18, 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 Chlorothalonil content (CIPAC 288/WP/(M)/3, CIPAC Handbook K, p.18, 2003)

The chlorothalonil 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, g/kg               Tolerance

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

Above 500 g/kg                                   ± 25 g/kg

Note: the upper limit is included in the lower range

3. Relevant impurities

3.1 Hexachlorobenzene (Note 1)

Maximum: 0.004% of the chlorothalonil content found under 2.2.

3.2 Decachlorobiphenyl (Note 1)

Maximum: 0.003% of the chlorothalonil content found under 2.2.

4. Physical Properties

4.1 Wet sieve test (MT 185.1, Note 2)

Maximum: 0.5% retained on a 75 μm test sieve.

4.2 Suspensibility (MT 184.1, CIPAC Handbook P, p.245, 2021) (Note 3)

Minimum 70 % after 30 min in CIPAC standard water D at 25 ± 5°C (Note 4)

4.3 Persistent foam (MT 47.3, CIPAC Handbook O, p. 177, 2017) (Note 5)

Maximum: 60 ml after 1 minute.

4.4 Wettability (MT 53.3.1, Handbook F, p. 165, 1995)

The product shall be completely wetted in 1 minute without swirling.

5. Storage Stability

5.1 Stability at elevated temperature (MT 46.4, CIPAC Handbook P, p.232, 2021)

After storage at 54 ± 2°C for 14 days, the determined average active ingredient content must not be lower than 97% relative to the determined average content found before storage (Note 6) and the formulation shall continue to comply with the clauses for:

- wet sieve test (4.1);

- suspensibility (4.2);

- wettability (4.4).

CHLOROTHALONIL WATER DISPERSIBLE GRANULES

FAO Specification 288/WG (September 2024)

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 (288/2004, 288/2005, 288/2007). It should be applicable to water dispersible granules of these manufacturers, and those of any other formulators who use only TC from the evaluated sources. The specification 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 who use TC from other sources. The evaluation reports (288/2004, 288/2005, 288/2007), as PART TWO, form an integral part of this publication.

1. Description

The material shall consist of a homogeneous mixture of technical chlorothalonil, complying with the requirements of FAO specification 288/TC (September 2024), together with carriers and any other necessary formulants. It shall be in the form of nearly spherical granules, produced by an agglomeration process, for application after disintegration and dispersion in water. The formulation shall be dry, free-flowing, essentially non-dusty and free from visible extraneous matter and hard lumps.

2. Active Ingredient

2.1 Identity tests (CIPAC 288/WG/(M)/2, CIPAC Handbook K, p.20, 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 Chlorothalonil content (CIPAC 288/WG/(M)/3, CIPAC Handbook K, p.20, 2003)

The chlorothalonil content shall be declared (g/kg) and, when determined, the average content measured shall not differ from that declared by more than the appropriate tolerances:

Declared content, g/kg              Tolerance

Above 250 up to 500 g/kg           ± 5% of the declared content

Above 500 g/kg                                   ± 25 g/kg

Note: the upper limit is included in the lower range

3. Relevant Impurities

3.1 Hexachlorobenzene (Note 1)

Maximum: 0.004% of the chlorothalonil content found under 2.2.

3.2 Decachlorobiphenyl (Note 1)

Maximum: 0.003% of the chlorothalonil content found under 2.2.

3.3 Water (MT 30.6, CIPAC Handbook P, p.222, 2021)

Maximum: 25 g/kg.

4. Physical properties

4.1 Wettability (MT 53.3.1, CIPAC Handbook F, p. 165, 1995)

The formulation shall be completely wetted in 1 minute without swirling.

4.2 Wet sieve test (MT 185.1, Note 2)

Maximum: 0.5% retained on a 75 μm test sieve.

4.3 Dispersibility (MT 174, Handbook F p. 435, 1995)

Dispersibility: minimum 90% after 1 minute of stirring.

4.4 Suspensibility (MT 184.1, CIPAC Handbook P, p.245, 2021) (Notes 3 & 4)

Suspensibility: minimum 80 % after 30 min in CIPAC standard water D at 25 ± 5°C.

4.5 Persistent foam (MT 47.3, CIPAC Handbook O, p. 177, 2017) (Note 5)

Maximum: 25 ml after 1 minute.

4.6 Dustiness (MT 171.1, CIPAC Handbook P, p.235, 2021) (Note 6)

The formulation shall have a maximum collected dust of 30 mg by the gravimetric method or a maximum dust factor of 25 by the optical method of MT 171.1.

4.7 Flowability (MT 172.2, CIPAC Handbook P, p.235, 2021) (Note 7)

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

5. Storage Stability

5.1 Stability at elevated temperature (MT 46.4, CIPAC Handbook P, p.232, 2021)

After storage at 54 ± 2°C for 14 days, the determined average active ingredient content must not be lower than 97% relative to the determined average content found before storage (Note 8) and the formulation shall continue to comply with the clauses for:

- wet sieve test (4.2);

- degree of dispersion (4.3);

- suspensibility (4.4);

- dustiness (4.6).

CHLOROTHALONIL SUSPENSION CONCENTRATE

FAO Specification 288/SC (September 2024)

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 (288/2004, 288/2005, 288/2007, 288/2014 & 288/2024). It should be applicable to suspension concentrates of these manufacturers, and those of any other formulators who use only TC from the evaluated sources. The specification 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 who use TC from other sources. The evaluation reports (288/2004, 288/2005, 288/2007, 288/2014 & 288/2024), as PART TWO, form an integral part of this publication.

1. Description

The material shall consist of a suspension of fine particles of technical chlorothalonil, complying with the requirements of FAO specification 288/TC (September 2024), in an aqueous phase together with suitable formulants. After gentle agitation, the material shall be homogenous (Note 1) and suitable for further dilution in water.

2. Active Ingredient

2.1 Identity tests (CIPAC 288/SC/(M)/2, CIPAC Handbook K, p.20, 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 Chlorothalonil content (CIPAC 288/SC/(M)/3, CIPAC Handbook K, p.20, 2003)

The chlorothalonil content shall be declared (g/kg or g/l at 20 ± 2°C, Note 2) and, when determined, the average content measured shall not differ from that declared by more than the appropriate tolerance, given in the following table of tolerances:

Declared content, g/kg                       Tolerance

Above 250 up to 500 g/kg                  ± 5% of the declared content

Above 500 g/kg                                          ± 25 g/kg

Note: the upper limit is included in the lower range

3. Relevant Impurities

3.1 Hexachlorobenzene (Note 3)

Maximum: 0.004% of the chlorothalonil content found under 2.2.

3.2 Decachlorobiphenyl (Note 3)

Maximum: 0.003% of the chlorothalonil content found under 2.2.

4. Physical properties

4.1 Pourability (MT 148.2, Note 4)

Maximum “residue”: 6%.

4.2 Spontaneity of dispersion (MT 160.1,)

Minimum 80% after 5 minutes in CIPAC standard water D at 25 ± 5°C.

4.3 Suspensibility (MT 184.1, CIPAC Handbook P, p.245, 2021) (Note 6)

Minimum 80% after 30 minutes in CIPAC Standard Water D at 25 ± 5°C.

4.4 Wet sieve test (MT 185.1, Note 7)

Maximum: 0.5% retained on a 75 m test sieve.

4.5 Persistent foam (MT 47.3, CIPAC Handbook O, p. 177, 2017) (Note 8)

Maximum: 60 ml after 1 minute.

5. Storage Stability

5.1 Stability at 0°C (MT 39.3, CIPAC Handbook J, p. 126, 2000)

After storage at 0 ± 2°C for 7 days, the formulation shall continue to comply with the clauses for:

- suspensibility (4.4), - wet sieve test (4.5).

5.2 Stability at elevated temperature (MT 46.4, CIPAC Handbook P, p.232, 2021)

After storage at 54 ± 2°C for 14 days, the determined average active ingredient content must not be lower than 97% relative to the determined average content found before storage (Note 9) and the formulation shall continue to comply with the clauses for:

- pourability (4.1);

- spontaneity of dispersion (4.2);

- suspensibility (4.3);

- wet sieve test (4.4).