Lambda-Cyhalothrin TC, EC, WG

Lambda-Cyhalothrin TC, EC, WG

LAMBDA-CYHALOTHRIN TECHNICAL MATERIAL

FAO Specification 463 / TC (December 2021)

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 (463/2003, 463/2006, 463/2012, 463/2014, 463/2019, 463/2021.2, 463/2021.3 & 463/2021.4). 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 (463/2003, 463/2006, 463/2012 & 463/2014, 463/2019, 463/2021.2, 463/2021.3 & 463/2021.4), as PART TWO, form an integral part of this publication.

1 Description

The material shall consist of lambda-cyhalothrin together with related manufacturing impurities and shall be a viscous brown/green semi-solid mass, which is liquid at 50°C and contains not more than a trace of insoluble material, and shall be free from extraneous matter and added modifying agents.

2 Active ingredient

2.1 Identity tests (463/TC/M/2, CIPAC Handbook E, p. 50, 1992)

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 Lambda-cyhalothrin content (463/TC/M/3, CIPAC Handbook E, p. 50, 1992)

The lambda-cyhalothrin content shall be declared (not less than 900 g/kg), and when determined, the average measured content shall not be lower than the declared minimum content.

3 Physical properties

3.1 Acidity (MT 31.2.1, CIPAC Handbook F, p. 98, 1995)

The maximum acidity shall be 0.5 g/kg, calculated as H2SO4.

LAMBDA-CYHALOTHRIN EMULSIFIABLE CONCENTRATE

FAO Specification 463 / EC (December 2021)

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 (463/2003, 463/2006). It should be applicable to relevant products 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 (463/2003, 463/2006 & 463/2019), as PART TWO, form an integral part of this publication.

1 Description

The material shall consist of technical lambda-cyhalothrin, complying with the requirements of FAO specification 463/TC (December 2021), dissolved in suitable solvents (Note 1) together with any other necessary formulants. It shall be in the form of a clear to slightly hazy, stable homogeneous liquid, free from visible suspended matter and sediment, to be applied as an emulsion after dilution with water.

2 Active ingredient

2.1 Identity tests (463/EC/M/2, CIPAC Handbook E, p. 56, 1992)

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 Lambda-cyhalothrin content (463/EC/M/3, CIPAC Handbook E, p.56, 1992)

The lambda-cyhalothrin content shall be declared (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 following amounts:

Declared content (g/l at 20 ± 2°C) Permitted tolerance

up to 25 g/l ± 15% of the declared content

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

Note: In each range the upper limit is included

3 Physical properties

3.1 pH range (1% aqueous emulsion) (MT 75.3, CIPAC Handbook J, p.131, 2000)

pH range: 6.0 to 8.0.

3.2 Emulsion stability and re-emulsification (MT 36.3, CIPAC Handbook K, p.137, 2003) (Notes 3 and 4)

The formulation, when diluted at 25 ± 5C with CIPAC Standard Waters A and D, shall comply with the following:

Time after dilution Limits of stability

0 h Initial emulsion complete

0.5 h ‘Cream’, maximum: 1 ml

2.0 h ‘Cream’, maximum: 2 ml

Free oil’, maximum: trace

24 h Re-emulsification complete

24.5 h ‘Cream’, maximum: 2 ml

‘Free oil’, maximum: trace

Note: tests after 24 h are required only where the results at 24 h are in doubt

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

Maximum: 15 ml after 1 minute.

4 Storage stability

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

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

4.2 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 shall not be lower than 95%, relative to the determined average content found under 2.2 before storage (Note 6), and the formulation shall continue to comply with the clauses for:

- pH range (3.1);

- emulsion stability and re-emulsification (3.2).

LAMBDA-CYHALOTHRIN WATER DISPERSIBLE GRANULES

FAO Specification 463 / WG (December 2021)

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 (463/2003, 463/2006). It should be applicable to relevant products 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 (463/2003, 463/2006 & 463/2019), as PART TWO, form an integral part of this publication.

1 Description

The material shall consist of an homogeneous mixture of technical lambda-cyhalothrin, complying with the requirements of FAO specification 463/TC (December 2021), together with carriers and any other necessary formulants. It shall be in the form of granules (Note 1) for application after disintegration and dispersion in water. The product shall be dry, free-flowing and free from visible extraneous matter and hard lumps.

2 Active ingredient

2.1 Identity tests (463/WP/M/2, CIPAC Handbook E, p. 54, 1992)

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 Lambda-cyhalothrin content (463/WP/M/3, CIPAC Handbook E, p.54, 1992) (Note 2)

The lambda-cyhalothrin content shall be declared (g/kg) and, when determined, the average content measured shall not differ from that declared by more than the following amounts:

Declared content, g/kg Permitted tolerance

up to 25 g/kg ± 25% of the declared content

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

Note:in each range the upper limit is included.

3 Physical properties

3.1 pH range (1% aqueous dispersion) (MT 75.3, CIPAC Handbook J, p.131, 2000)

pH range: 6.0 to 8.5.

3.2 Wettability (MT 53.3, CIPAC Handbook F, p.164, 1995)

The formulation shall be completely wetted in 5 seconds without swirling.

3.3 Wet sieve test (MT 185, CIPAC Handbook K, p.149, 2003)

A maximum of 0.5 % w/w shall be retained on a 75 m test sieve.

3.4 Degree of dispersion (MT 174, CIPAC Handbook F, p.435, 1995)

The minimum dispersibility shall be 70% after 1 minute of stirring.

3.5 Suspensibility (MT 184.1, CIPAC Handbook P, p.245, 2021) (Notes 3, 4 and 5)

A minimum of 50% of the lambda-cyhalothrin content found under 2.2 shall be in suspension after 30 minutes in CIPAC standard water D at 25  5C.

3.6 Persistent foam (MT 47.3, CIPAC Handbook O, p.177, 2017) (Note 6)

Maximum: 10 ml after 1 minute.

3.7 Dustiness (MT 171.1, CIPAC Handbook P, p. 235, 2021) (Note 7)

The formulation shall be essentially non-dusty.

3.8 Flowability (MT 172.1, CIPAC Handbook F, p.430, 1995)

At least 98% 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 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 shall not be lower than 95%, relative to the determined average content found under 2.2 before storage (Note 8), and the material shall continue to comply with the clauses for:

- pH range (3.1);

- wet sieve test (3.3);

- degree of dispersion (3.4);

- suspensibility (3.5);

- dustiness (3.7).