ATRAZINE TC, WDG, SC

ATRAZINE TC, WDG, SC

Common name:  atrazine (BSI, E-ISO, (f) F-ISO, ANSI, WSSA, JMAF)

IUPAC name:  6-chloro-N2-ethyl-N4-isopropyl-1,3,5-triazine-2,4-diamine

Chemical Abstracts name:  6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diamine

CAS RN [1912–24–9]

M.f. C8H14ClN5

ATRAZINE TECHNICAL MATERIAL: FAO Specification 91/TC (December 2024)

Identity tests (91/TC/M2, CIPAC Handbook P, p. 13, 2021)

The active ingredient shall comply with an identity test and, where the identity remains in doubt, shall comply with at least one additional test.

Atrazine content (91/TC/M3, CIPAC Handbook P, p. 13, 2021)

The atrazine content shall be declared (not less than 960 g/kg) and, when determined, the average measured content shall not be lower than the declared minimum content.

ATRAZINE SUSPENSION CONCENTRATE: FAO Specification 91/SC (December 2024*)

Atrazine content (91/SC/M, CIPAC Handbook P, p. 18, 2021)

The atrazine content shall be declared (g/kg or 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 appropriate tolerance, given in the following table of tolerances:

Declared content                    Tolerance          

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

above 250 up to 500               ± 5 % of the declared content

above 500                                ± 25 g/kg or g/l

Note: In each range the upper limit is included

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

pH range: 4 to 8

Pourability (MT 148.2, Note 3)

Maximum "residue": 5 %

Spontaneity of dispersion (MT 160.1)

Minimum 60% after 5 min in CIPAC standard water D at 25 ± 5°C.

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

Minimum 80 % after 30 min in CIPAC standard water D at 25 ± 5°C.

Wet sieve test (MT 185.1)

Maximum: 2 % retained on a 75 μm test sieve.

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

Maximum: 60 ml after 1 min.

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 the clauses for:

- suspensibility ,

- wet sieve test .

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

- pH range  

- pourability ,

- spontaneity of dispersion ,

- suspensibility ,

- wet sieve test .

ATRAZINE WATER DISPERSIBLE GRANULES: FAO Specification 91/WG (December 2024)

Atrazine content (91/WG/M3, CIPAC Handbook P, p. 17, 2021)

The atrazine 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 following table of tolerances.

Declared content in g/kg    Tolerance

above 250 up to 500        ± 5% of the declared content

Wettability (MT 53.3.1, CIPAC Handbook F, p. 165, 1995)

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

Wet sieve test (MT 185.1)

Maximum: 2 % retained on a 75 μm test sieve.

Dispersibility (MT 174, CIPAC Handbook F, p. 435, 1995)

Dispersibility: minimum 60 % after 1 minute of stirring.

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

Suspensibility: minimum 70 % after 30 min in CIPAC standard water D at 25 ± 5°C.

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

Maximum: 90 ml after 1 minute.

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

The formulation shall have a maximum collected dust of 30 mg by the gravimetric method or a maximum dust factor of 25 by the optical method of MT 171.1.

Flowability (MT 172.2, CIPAC Handbook P, p.235, 2021)

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

Attrition resistance (MT 178.3)

Minimum: 98 % attrition resistance.

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

- wet sieve test,

- dispersibility,

- suspensibility,

- dustiness,

- attrition resistance,