Thiamethoxam TC, WDG, SC

Thiamethoxam TC, WDG, SC

THIAMETHOXAM TECHNICAL MATERIAL

FAO Specification 637 / TC (March 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 (637/2012 & 637/2020). 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 specifications. The specification may not be appropriate for TC produced by other manufacturers. The evaluation reports (637/2012 & 637/2020), as PART TWO, form an integral part of this pub-lication.

1 Description

The material shall consist of thiamethoxam together with related manufacturing im-purities, in the form of white to beige granular powder, and shall be free from visible extraneous matter and added modifying agents.

2 Active ingredient

2.1 Identity tests (CIPAC 637/TC/M/2, CIPAC Handbook O, p. 148, 2017)

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 Thiamethoxam content (CIPAC 637/TC/M/3, CIPAC Handbook O, p. 149, 2017)

The thiamethoxam content shall be declared (not less than 980 g/kg) and, when determined, the average measured content shall not be lower than the declared minimum content.

THIAMETHOXAM WATER DISPERSIBLE GRANULES

FAO Specification 637 / WG (March 2021)

This specification, which is PART ONE of this publication, is based on an evaluation of data submitted by the manufacturers whose name are listed in the evaluation reports (637/2012 & 637/2020). It should be applicable to WG produced by this manufacturer but it is not an endorsement of those products, nor a guarantee that they comply with the specifications. The specification may not be appropriate for WG produced by other manufacturers. The evaluation report (637/2012 & 637/2020), as PART TWO, form an integral part of this publi-cation.

1 Description

The material shall consist of a homogeneous mixture of technical thiamethoxam, com-plying with the requirements of the FAO specification 637/TC (March 2021), together with carriers and any other necessary formulants. It shall be in the form of granules 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 637/TC/M/2, CIPAC Handbook O, p. 148, 2017)

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 Thiamethoxam content (CIPAC 637/TC/M/2, CIPAC Handbook O, p. 152, 2017)

The thiamethoxam content shall be declared (g/kg) and, when determined, the average content measured shall not differ from that declared by more than the appropriate tolerance, given in the table of tolerances.

Declared content in g/kg                   Tolerance

Above 100 up to 250                          ± 6% of declared content

Note In each range the upper limit is included

3 Physical properties

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

The formulation shall be completely wetted in 40 seconds in CIPAC water D.

3.2 Wet sieve test (MT 185, CIPAC Handbook K, p. 149, 2003) Maximum: 0.5% retained on a 75 μm test sieve.

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

Dispersibility: minimum 60% after 1 minute of stirring.

3.4 Suspensibility (MT 184.1, CIPAC Handbook P, p. 245, 2021) (Notes 1 & 2)

A minimum of 80% shall be in suspension after 30 min in CIPAC Standard Wa-ter D at 25 ± 5°C.

3.5 Persistent foam (MT 47.3, Handbook O, p. 177, 2017) (Note 3)

Maximum: 60 ml after 1 minute in Standard CIPAC water D.

3.6 Dustiness (MT 171.1, CIPAC Handbook P, p. 235, 2021) (Note 4)

Essentially non-dusty.

3.7 Flowability (MT 172.2, CIPAC Handbook P, p. 241, 2021)

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

3.8 Attrition resistance (MT 178.2, CIPAC Handbook K, p. 140, 2003)

Minimum: 90% attrition resistance.

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 must not be lower that 95% relative to the determined average content found before storage (Note 7) and the formulation shall continue to comply with the clauses for:

- wet sieve test (3.2)

- degree of dispersion (3.3)

- suspensibility (3.4)

- dustiness (3.6)

- attrition resistance (3.8)

THIAMETHOXAM SUSPENSION CONCENTRATE

FAO Specification 637 / SC (March 2021)

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 report (637/2012). It should be applicable to SC produced by this manufacturer but it is not an endorsement of those products, nor a guarantee that they comply with the specifications. The specification may not be appropriate for SC produced by other manufacturers. The evaluation report (637/2012), as PART TWO, forms an integral part of this publication.

1 Description

The material shall consist of a suspension of fine particles of technical thiamethoxam, complying with the requirements of FAO specification 637/TC (March 2021), in the form of a beige to brown liquid, consisting of an aqueous phase together with suitable formulants. After gentle agitation the material shall be homogeneous (Note 1) and suitable for further dilution in water.

2 Active ingredient

2.1 Identity tests (637/SC/M/2, CIPAC Handbook O, p. 148, 2017)

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 Thiamethoxam content (637/SC/M/2, CIPAC Handbook O, p. 148, 2017)

The thiamethoxam content shall be declared (g/kg or g/l at 20 ± 2ºC, Note 2) and, when determined, the average content measured shall not differ from that declared by more than the appropriate tolerance, given in the table of toler-ances.

Declared content in g/kg or g/l at 20 ± 2^oC                 Tolerance

Above 100 up to 250                                                      ± 6% of declared content

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: 4 to 8

3.2 Pourability (MT 148.1, CIPAC Handbook J, p. 133, 2000)

Maximum "residue": 5%.

3.3 Spontaneity of dispersion (MT 160, CIPAC Handbook F, p. 391, 1995) (Notes 3 & 4)

A minimum of 70% shall be in suspension after 5 min in CIPAC Standard Water D at 30 ± 2°C.

3.4 Suspensibility (MT 184.1, CIPAC Handbook P, p. 245, 2021) (Note 4)

A minimum of 80% of the thiamethoxam content found in section 2.2 shall be in suspension after 30 min in CIPAC Standard Water D at 25 ± 2°C.

3.5 Wet sieve test (MT 185, CIPAC Handbook K, p. 149, 2001) (Note 5)

Maximum: 0.5% of the formulation shall be retained on a 75 μm test sieve.

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

Maximum: 30 ml after 1 min.

4 Storage stability

4.1 Stability at 0°C (MT 39.3, CIPAC Handbook J, p. 128, 2000)

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

- suspensibility (3.4),

- wet sieve test (3.5)

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 must not be lower than 95% relative to the determined average content found before storage (Note 7) and the formulation shall continue to comply with the clauses for:

- pH range (3.1),

- pourability (3.2),

- spontaneity of dispersion (3.3),

- suspensibility (3.4),

- wet sieve test (3.5)