Mancozeb TC, WP

Mancozeb TC, WP

MANCOZEB TECHNICAL CONCENTRATE

FAO Specification 34 / TK (December 2020)

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 (34/2020). It should be applicable to TK 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 TK produced by other manufacturers. The evaluation report (34/2020) as PART TWO forms an integral part of this publication.

1 Description

The material shall consist of mancozeb together with related manufacturing impurities, and shall be a yellowish powder free from visible extraneous matter and added modifying agents except for the diluent and stabilizer.

2 Active ingredient

2.1 Identity tests (CIPAC/5157)

The active ingredient shall comply with at least two of the following tests and, when in doubt shall comply with an additional test:

2.2 Mancozeb content (CIPAC/5157)  

The mancozeb content shall be declared (850 g/kg) and, when determined, the average measured content shall not differ from that declared by more than ± 25 g/kg.

3 Relevant impurities

3.1 Hexamethylene tetramine (HMTA) Maximum : 20 g/kg  

3.2 Water (MT 30.2, Handbook F, p. 94, 1995),

Maximum: 1 g/kg.

MANCOZEB WETTABLE POWDER

FAO Specification 34 / WP (December 2020)

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 (34/2020). It should be applicable to WP 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 WP produced by other manufacturers. The evaluation report (34/2020) as PART TWO forms an integral part of this publication.

6.11.1 Description

The material shall consist of a homogeneous mixture of technical mancozeb, complying with the requirements of FAO specification 34/TK (December 2020)], 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/5157)

The active ingredient shall comply with at least two of the following tests and, when in doubt shall comply with an additional test.

2.2 Mancozeb content (CIPAC/5157)

The mancozeb content shall be declared, (above 500 g/kg) and, when determined, the average measured content shall shall not differ from that declared by more than 25 g/kg.

3 Relevant impurities

3.1 Hexamethylene tetramine (HMTA) Maximum: 2 % of the mancozeb found under 2.2

3.2 Water (MT 30.2, Handbook F, p. 94, 1995),

Maximum: 1 g/kg.

4 Physical properties

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

pH range: 6 to 8 (1% dilution)

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

Maximum: 1% retained on a 75 μm test sieve.

4.3 Suspensibility (MT 184.1)

A minimum of 80% of the mancozeb content found under 2.2 shall be in suspension after 30 min in CIPAC Standard Water D at 25 ± 5°C.

4.4 Persistent foam (MT 47.3, Handbook O, p. 117, 2017)

Maximum: 25ml after 1 min.

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

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

5 Storage stability

5.1 Stability at elevated temperature (MT 46.4)  

After storage at 54 ± 2°C for 14 days , the determined average active ingredient content must not be lower than 90% relative to the determined average content found before storage and the formulation shall continue to comply with the clauses for:

- water (3.2),

- pH range (4.1),

- wet sieve test (4.2),

- suspensibility (4.3),

- wettability (4.5),