Thiodicarb TC, WDG

Thiodicarb TC, WDG

THIODICARB TECHNICAL

FAO Specification 543/TC/S/F (1997)

1. DESCRIPTION

The material shall consist of thiodicarb together with related manufacturing impurities and shall be a white to light tan crystalline powder free from visible extraneous matter and added modifying agents.

2. ACTIVE INGREDIENT

2.1 Identity tests (543/TC/M/2, CIPAC H, to be published) (Note 1)

An identity test is required if the identity of the active ingredient is in doubt (e.g. chromatographic retention time under analytical conditions of the method of analysis or IR Spectrum).

2.2 Thiodicarb (543/TC/M/3, CIPAC H, to be published) (Note 1)

The thiodicarb content shall be declared (not less than 940 g/kg) and, when determined, the content obtained shall not differ from that declared by more than ± 20 g/kg.

3. IMPURITIES

3.1 Manufacturing impurities (Note 1)

Methomyl: Maximum 5 g/kg.

4. PHYSICAL PROPERTIES

4.1 Melting point (MT 2, CIPAC F, p. 5)

Melting point range: 158 to 163ºC.

4.2 pH range (MT 75, CIPAC F, p. 205)

pH range: 5.8 to 6.6.

THIODICARB  WATER DISPERSIBLE GRANULES

FAO Specification 543/WG/S/F (1997)

1. DESCRIPTION

The material shall consist of a homogeneous mixture of technical thiodicarb, complying with the requirements of FAO Specification 543/TC/S/F (1997), together with filler(s) and any other necessary formulants in the form of granules to be applied after desintegration 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 (543/WG/M/2, CIPAC H, to be published) (Note 1)

An identity test is required if the identity of the active ingredient is in doubt (e.g. chromatographic retention time under conditions of the method of analysis or IR spectrum).

2.2         Thiodicarb (543/WG/M/3, CIPAC H, to be published) (Note 1)

The thiodicarb content shall be declared (g/kg) and, when determined, the content obtained shall not differ from that declared by more than the following amounts:

              Declared content                         Permitted tolerance

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

              above 500 g/kg ±  25 g/kg

3.                  IMPURITIES

3.1         Manufacturing impurities (Note 1)

Methomyl: Maximum 0.5% of the thiodicarb content found under 2.2.

3.2         Water (MT 30, CIPAC F, p.91)

Maximum : 15 g/kg.

4.           PHYSICAL PROPERTIES

4.1         pH range (MT 75.2, CIPAC F, p. 205)

pH range: 4.0  to  7.0.

4.2         Wetting of the product without swirling (MT 53.3.1, CIPAC F, p. 165)

It shall be completely wetted in 2 minutes without swirling.

4.3 Wet sieve test (MT 167, CIPAC F, p. 416 )

Maximum : 1% retained on a 75 m test sieve.

4.4 Suspensibility (MT 168, CIPAC F, p. 417) (Notes 2 and 3)

A minimum of 70 % of the thiodicarb content found 2.2 shall be in suspension  after 30 minutes in CIPAC Standard Water D at 30°C ± 2°C.

Alternatively, if the buyer requires other CIPAC Standard Waters or temperatures  to be used, then this shall be specified.

4.5 Degree of dispersion (MT 174, CIPAC F, p. 435)

Minimum:  90%

4.6 Persistent foam (MT 47.1, CIPAC F, p. 152)

Maximum: 15 ml after 1 minute (10 g/l dilution).

4.7 Dustiness (MT 171.1, CIPAC F, p. 425) (Note 4)

Maximum: 12 mg collected dust.

4.8 Flowability (MT 172, CIPAC F, p. 149)

100% of the product shall pass through a 5 mm test sieve after 20 drops of the sieve.   

5. STORAGE STABILITY           

5.1 Stability at 54°C (MT 46.1.1, CIPAC F, p.149)

After storage at 54°C ± 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, and the product shall continue to comply with: 3.1, 4.1, 4.3, 4.4 and 4.5 (Note 5).