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FAO-simazine

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FAO-simazine

     AGP : CP / 61

    FAO SPECIFICATIONS

    FOR PLANT PROTECTION PRODUCTS

    SIMAZINE

    2-chloro-4,6-bisethylamino-1,3,5-triazine

    FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS

    Rome, 1975

    DISCLAIMER

     FAO specifications are developed with the basic objective of ensuring, as far as possible, that pesticides complying with them are satisfactory for the purpose for which they are intended. However, the Group on Pesticide Specifications of the FAO Panel of Experts on Pesticide Specifications, Registration Requirements, Application Standards and Prior Informed Consent wishes to emphasize that, owing to the complexity of the problems involved, questions such as the suitability of pesticides for the control of a particular pest must be decided at national or provincial level. These specifications should not be assumed to be an endorsement of the use of a particular compound for a given purpose by either the Group of Experts or FAO.

     Accordingly, neither the Food and Agriculture Organization of the United Nations (FAO) nor the members of the Group on Pesticide Specifications of the FAO Panel of Experts on Pesticide Specifications, Registration Requirements, Application Standards and Prior Informed Consent warrant that pesticides complying with these specifications are suitable for control of any given pest or for use in any particular area.

     Furthermore, the preparation and use of pesticides complying with these specifications are not exempt from any safety regulation or other legal or regulatory provision applicable thereto. Neither FAO nor any member of the FAO Group of Experts shall be liable for any injury, loss, damage or prejudice of any kind that may be suffered as a result of the preparation or use of pesticides complying with these specifications.

     Additionally, the Group of Experts wishes to warn users of specifications that improper field mixing and/or application of pesticides can result in either a lowering or complete loss of their efficacy. This holds true even in cases where such pesticides comply with the specifications indicated.

     Accordingly, the Group of Experts and/or FAO can accept no responsibility for the consequences of improper field mixing and/or application.

    INTRODUCTION

     From time to time, FAO publishes booklets of specifications for technical materials and related formulations of plant protection products. Revisions of, and additions to, already published specifications will be issued when necessary, but revisions may be printed in the FAO

    Plant Protection Bulletin during the interval between editions.

     The specifications contained herein have been carefully reviewed and agreed by the Group on Pesticide Specifications of the FAO Panel of Experts on Pesticide Specifications, Registration Requirements, Application Standards and Prior Informed Consent after consultations with official government scientists, the pesticides industry through GCPF (Global 1Crop Protection Federation) and, where appropriate, with individual manufacturers.

     FAO has published a Manual on the development and use of FAO Specifications for Plant Protection Products, FAO Plant Production and Protection Paper No. 128, Rome 1995 (available in English from the FAO Plant Protection Service).

     This manual contains detailed definitions and other essential background information on basic procedures and technical principles adopted by the group on Pesticide Specifications of the FAO Panel of Experts on Pesticide Specifications, Registration Requirements, Application Standards and Prior Informed Consent, such as:

1. Categories of Specifications (Section 3.1 of the Manual)

     FAO Tentative Specifications (Code „S/T‟, formerly „TS) are those which have been

    recommended by FAO as preliminary specifications and which are based on minimum

    requirements. The methods of analysis cited are normally supplied by the manufacturer

    or may already have been published or be the subject of collaborative work.

     FAO Provisional Specifications [Code „S/P‟, formerly („S‟)] are those for which more

    evidence of the necessary parameters is available and where some collaborative study of

    the methods of analysis has been carried out.

     FAO (full) Specifications (Code „S/F‟, formerly „S‟).

     Specifications that have all necessary requirements together with CIPAC (full) methods, 2, 3or other collaboratively studied (proven) methods.

     Wherever possible, standards for apparatus and common names for pesticides are those

    approved by the International Organization for Standardization (ISO).

    2. Expression of active ingredient content (Section 4.2.5 of the Manual)

     - for solids, liquid technical materials, volatile liquids (of maximum boiling point 3250 ?C) and viscous liquids (with minimum kinematic viscosity of 1 x 10 m/s at

    20 ?C) the FAO Specification shall be based on expression of the content as g/kg;

     - for all other liquids the active ingredient content of the product shall be declared

    in terms of g/kg or g/l at 20 ?C. If the customer requires both g/kg and g/l at

    20 ?C, then in case of dispute the analytical results shall be calculated as g/kg.

3. Tolerance on content (Section 4.2.7 of the Manual)

     A declared content of active ingredient must be included in all specifications, and one of

    the problems immediately arising is the level of tolerance acceptable about the nominal

    figure. The tolerance is influenced by (a) the reproducibility of the method of analysis, (b)

    the sampling error and (c) the manufacturing variance.

     Allowable variations in analytical results (i.e. tolerances in content of active ingredient)

    with respect to specific pesticide consignments are intended to cover reasonable

    variations in the contents of active ingredients. For examples of such tolerances, see the

    table in Section 4.2.7 of the Manual.

4. Containers/packaging

     FAO guidelines are in preparation.

     Containers shall comply with pertinent national and international transport and safety

    regulations.

     Technical materials, dustable powders and granules

     Containers shall be suitable, clean, dry and as specified, and shall not adversely affect, or

    be affected by, the contents, but shall adequately protect them against external conditions.

     Wettable powders

     The product shall be packed in suitable, clean, dry containers as specified in the order.

    The container shall provide all necessary protection against compaction, atmospheric

    moisture, loss by vaporization and/or contamination to ensure that the product suffers no

    deterioration under normal transit and storage conditions.

     The product shall be protected by an adequate moisture barrier. This may be a suitable

    bag of polyethylene or alternative means of giving equal or better protection.

     Solutions and emulsifiable concentrates

     Containers shall be lined, where necessary, with a suitable material, or the interior

    surfaces shall be treated to prevent corrosion and/or deterioration of the contents.

     Additional information should be given in all specifications where particular pesticides

    present problems in packaging.

5. Biological information

     Phytotoxicity

     No test can be specified to cover the possible phytotoxicity of a formulation to all crops.

    When a crop is not mentioned in the instructions for use, purchasers should check with

    the supplier that the material is suitable, always provided that such a use is not restricted

    or legally forbidden.

     Wetting of crops

     The dilute spray should satisfactorily wet the leaves of the specified crops when used in

    accordance with the instructions. Test method MT 53.2, CIPAC F, p.162, may be useful. _______________________________________________________

     1 Should national pesticide specifications developed from these approved FAO specifications deviate from them, the National Authority responsible for making such changes is requested to inform the FAO Plant Protection Service of the nature of, and the reasons for, the modifications.

     2 Methods of analysis and miscellaneous techniques referred to in these specifications have been developed and adopted by CIPAC (Collaborative International Pesticides Analytical Council Ltd.). See CIPAC Handbooks 1 (1970), 1A (1980), 1B (1983), 1C (1985), D (1988), E (1993), F (1995), G (1995), CIPAC Proceedings 1980 and 1981, obtainable from Black Bear Press Limited, King's Hedges Road, Cambridge CB4 2PQ, England. The page numbers of specific methods are given in parentheses in the specifications. Copies of methods not yet published can be obtained from the FAO Plant Protection Service.

     3 Information on standard waters for laboratory evaluation of pesticidal formulations will be found in CIPAC Monograph 1, Standard Waters and an FAO Survey on Naturally Occurring

    Waters (1972), Black Bear Press Limited, King's Hedges Road, Cambridge CB4, England.

    SIMAZINE TECHNICAL

    FAO Specification Code 22/1/S/9:

.1 DESCRIPTION

     The material shall consist, essentially, of simazine and shall be a white to light beige

    powder, free from extraneous materials and added modifying agents.

.2 ACTIVE INGREDIENTS

     .2.1 Identity

     .2.1.1 Melting Point (method 22/1/(M)/2.2; see note 1) o Minimum: 225C

     When mixed with equal quantities of pure simazine, no depression in the

     melting point of the sample shall occur (see note 5).

     .2.1.2 Other Tests (method 22/1/m/2.3; see note 1).

     It shall comply

     .2.2 Simazine (method 22/1/M/2.5; see note 1).

     .2.2.2 Declared Content

     The simazine content shall be declared and, when determined, the content

     obtained shall not differ from that declared by more than + 2 percentage units.

     .3 IMPURITIES

     .3.1 Sodium Chloride Content (method 22/1/M/2.7; see note 1)

     Maximum: 2.0%

     o .3.2 Loss on drying at 105C to constant weight. (method 22/M/2.8;

     see note 1).

     Maximum: 3.0%

    SIMAZINE DISPERSIBLE POWDERS

    FAO Specification Code 22/3/S/9:

.1 DESCRIPTION

     The product shall consist of a homogenous mixture containing atrazine technical as the only active ingredient, together with CARRIERS and any necessary formulants. It shall be a fine powder free from extraneous materials and hard lumps.

     It shall be formulated from simazine technical complying with the specification for “Simazine Technical” (22/1/S/9; see previous page).

.2 ACTIVE INGREDIENT

     .2.1 Identity (method 22/3/m/2.2; see note 1)

     It shall comply.

     .2.2 Simazine (method 22/3/M/2.4; see note 1)

     The simazine content (see note 7) shall be declared and, when determined, the content

     obtained shall not differ from that declared by more than the following amounts:

    Declared Content Permitted Tolerance

    Up to 40% +10 or 5% of the

    declared content

    Above 40% +4 or 2 percentage units

.3 PHYSICAL PROPERTIES

     .3.1 Wet sieve test (method 22/3/M/2.6; see note 1).

     Maximum: Not less than 98% of the product shall pass through a 75 am test sieve.

     .3.2 Suspensibility (method 22/3/M/2.7; see note 1).

     A minimum of 60% of the simazine content declared under .2.2 shall be in

     suspension after 30 min in CIPAC Standard Water A when determined on the product

     as received, and in CIPAC Standard Water C after the Heat stability test.

     Alternatively, if the buyer requires other CIPAC Standard Waters to be used, then

     this shall be specified when ordering.

     .3.3 Wettability of the powder (method 22/3/M/2.8; see note 1).

     It shall be completely wetted in not more than 1.5 min., without swirling.

     .3.4 Persistent foam (method 22/3/M/2.9; see note 1)

     Maximum: 25 ml of foam after 1 min.

.4 STORAGE STABILITY

     .4.1 Heat Stability (method 22/3/M/2.10; see note 1). o After storage at 54 + 2C for 14 days, the product shall continue to comply with .2.2,

     .3.1 and .3.3.

.5 CONTAINERS

     The product should be packed in suitable, clean, dry and as specified in the order. The

     container shall provide all necessary protection against compaction, atmospheric

     moisture, oxidation, loss by evaporation, and/or contamination to ensure that the

     product suffers no deterioration under normal transit and storage conditions.

     The product shall be protected by an adequate moisture barrier. This may be an inner

     bag of polyethylene (note 4), or alternative means of giving equal or better protection.

     Containers shall comply with pertinent national and international transport and safety

     regulations.

    NOTES

    1. Method not included in CIPAC I, but will appear in IA. Pending such publication, copy of method may

     be obtained on requests from the FAO Secretariat.

    2. This maximum applies only to chloropropham applied pre-emergent or to growing crops and is

     unacceptable for application to harvested potatoes for sprout inhibition.

    3. Some countries require the content of atrazine and related herbicidal triazine compounds to be declared.

     In such cases, the tolerances given in .2.2 shall apply.

    4. Because o variation in the nature and size of the container, its destination, and other factors, it is not

     possible to specify the thickness of the polyethylene, but as a guideline for a container with 50 kg of

     product, the inner liner should not be less than 0.075 mm. thick.

     o5. Melting point range of simazine technical is 225-235C.

    6. Some countries require the content of simazine and related herbicidal triazine compounds to be

     declared. In such cases, the minimum requirement is 97.0% and the tolerances are as given in .2.2.2

     (method 22/1/M/2.4; see note 1).

    7. Some countries require the content of simazine and related herbicidal triazine compounds to be

     declared. In such cases, the tolerances given in .2.2 shall apply (method 22/3/(M)/2.3; see note 1).

    8. Some countries require the content of propazine and related herbicidal triazine compounds to be

     declared. In such cases, the minimum requirement is 97.0% and the tolerances are as given in .2.2.

     (method 92/1/(M)/2.4; see note 1).

    9. Some countries require the content of propazine and related herbicidal triazine compounds to be

     declared. In such cases, the tolerances given in .2.2 shall apply (method 92/3/(M)/2.3; see note 1).

    10. Some countries require the content of prometryn and related herbicidal triazine compounds to be

     declared. In such cases, the minimum requirement is 97.0% and the tolerances are as given in .2.2.

     (method 93/1/(M)/2.4; see note 1).

    11. Some countries require the content of prometryn and related herbicidal triazine compounds to be

     declared. In such cases, the tolerances given in .2.2. shall apply (method 93/3/(M)/2.3; see note 1).

    12. Some countries require the content of methoprotryn and related herbicidal triazine compounds to be

     declared. In such cases, the minimum requirement is 96.0% and the tolerances are as given in .2.2.2

     (method 94/1/(M)/2.4; see note 1).

    13. Some countries require the content of methoprotryn and related herbicidal triazine compounds to be

     declared. In such cases, the tolerances given in .2.2 shall apply (method 94/3/(M)/2.3; see note 1).

    14. Some countries require the content of amettyn and related herbicidal triazine compounds to be declared.

     In such cases, the minimum requirement is 97.0% and the tolerances are as given in .2.2.2 (method

     133/1/(M)/1.3; see note 1).

    15. Some countries require the content of ametryn and related herbicidal triazine compounds to be declared.

     In such cases, the minimum requirement is 95.0% and the tolerances are as given in .2.2.2 (method

     212/1/M/1.3; see note 1).

    16. Some countries require the content of terbutryn and related herbicidal triazine compounds to be

     declared. In such cases, the minimum requirement is 95.0% and the tolerances are as given in .2.2.2

     (method 212/1/M/1.3; see note 1).

    17. Some countries require the content of terbutryn and related herbicidal triazine compounds to be

     declared. In such cases, the tolerances given in .2.2 shall apply (method 212/3/M/1.3; see note 1).

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