Azoxystrobin TC, SC, WDG

Azoxystrobin TC, SC, WDG

AZOXYSTROBIN TECHNICAL MATERIAL

FAO Specification 571 / TC (January 2022)

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 (571/2007, 571/2009, 571/2013, 571/2016.1, 571/2016.2, 571/2018, 571/2019 & 571/2021). It should be applicable to technical materials 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 (571/2007, 571/2009, 571/2013, 571/2016.1, 571/2016.2, 571/2018, 571/2019 & 571/2021), as PART TWO, form an integral part of this publication.

1 Description

The material shall consist of azoxystrobin together with related manufacturing impurities, in the form of an off-white to light brown or yellowish powder and shall be free from visible extraneous matter and added modifying agents.

2 Active ingredient

2.1 Identity tests (CIPAC 571/TC/M/2, Handbook M, p. 11, 2009)

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 Azoxystrobin content (CIPAC 571/TC/M/3, Handbook M, p. 11, 2009)

The azoxystrobin content shall be declared (not less than 965 g/kg) and, when determined, the average measured content shall not be lower than the declared minimum content.

AZOXYSTROBIN WATER DISPERSIBLE GRANULES

FAO Specification 571 / WG (January 2022)

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 (571/2007 and 571/2009). 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 (571/2007 and 571/2009), as PART TWO, form an integral part of this publication.

1 Description

The material shall consist of an homogeneous mixture of technical azoxystrobin, complying with the requirements of FAO Specification 571/TC (January 2022), together with carriers and any other necessary formulants. It shall be in the form of cylindrical granules (approximate diameter 0.6–1 mm and length 2–8 mm), 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 571/WG/M/2, Handbook M, p. 14, 2009)

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 Azoxystrobin content (CIPAC 571/WG/M/3, Handbook M, p. 14, 2009).

The azoxystrobin 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                         Permitted tolerance

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

3 Physical properties

3.1 Wettability (MT 53.3, CIPAC Handbook F, p.165, 1995)

The formulation shall be completely wetted in 30 seconds, with swirling.

3.2 Wet sieve test (MT 185, CIPAC Handbook K, p.149, 2003) (Note 1)

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 70% after 1 minute of stirring.

3.4 Suspensibility (MT 184.1, CIPAC Handbook P, p. 245, 2021) (Notes 2 & 3)

Minimum: 60% after 30 minutes in CIPAC Standard Water D at 30 ± 2°C.

3.5 Persistent foam (MT 47.3, CIPAC Handbook O, p. 177, 2017) (Note 4)

Maximum: 60 ml after 1 minute.

3.6 Dustiness (MT 171.1, CIPAC Handbook P, p. 235, 2021) (Note 5)

Essentially non-dusty.

3.7 Flowability (MT 172.2, CIPAC Handbook P, p. 241, 1995)

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 6) and the formulation shall continue to comply with the clauses for:

- wet sieve test (3.1)

- degree of dispersion (3.3)

- suspensibility (3.4)

- dustiness (3.6)

- attrition resistance (3.8)

AZOXYSTROBIN SUSPENSION CONCENTRATE

FAO Specification 571 / SC (January 2022)

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 (571/2007 and 571/2009). 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 (571/2007 and 571/2009), as PART TWO, form an integral part of this publication.

1 Description

The material shall consist of a suspension of fine particles of technical azoxystrobin complying with the requirements of FAO Specification 571/TC (January 2022), in 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 (CIPAC 571/SC/M/2, CIPAC Handbook M, p. 15, 2009)

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 Azoxystrobin content (CIPAC 571/SC/M/3, CIPAC Handbook M, p. 15, 2009)

The azoxystrobin 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 following amounts:

Declared content, g/kg or g/l at 20ºC          Permitted tolerance

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

3 Physical properties

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

pH range: 6 to 8.

3.2 Pourability (MT 148.1, CIPAC Handbook F, p.348, 1995)

Maximum residue: 8%.

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

Minimum: 80% of the azoxystrobin content found under 2.2 shall be in suspension after 5 minutes in CIPAC Standard Water D at 30 ± 2°C.

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

Minimum: 90% of the azoxystrobin content found under 2.2 shall be in suspension after 30 minutes in CIPAC Standard Water D at 30 ± 2°C.

3.5 Wet sieve test (MT 185, CIPAC Handbook K, p.148, 2003) (Note 4)

Maximum: 0.1% of the formulation shall be retained on a 75 μm test sieve.

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

Maximum: 20 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 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 6) 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).