NY/T 1860.16-2016Guidance on the determination of physio-chemical properties of pesticides - Part 16: Corrosion characteristics to packaging material (English PDF)

Foreword

NY/T 1860 "Guidance on the determination of physico-chemical properties of

pesticides" consists of 38 parts.

- Part 1. pH;

- Part 2. Acidity and alkalinity;

- Part 3. Appearance;

- Part 4. Thermal stability;

- Part 5. Ultraviolet/visibility absorption;

- Part 6. Explodability;

- Part 7. Photo-transformation in water;

- Part 8. Partition coefficient (n-octanol/water);

- Part 9. Hydrolysis;

- Part 10. Oxidation/Reduction. chemical incompatibility;

- Part 11. Flash point;

- Part 12. Fire point;

- Part 13. Miscibility with hydrocarbon oil;

- Part 14. Saturated vapour pressure;

- Part 15. Flammability of solids;

- Part 16. Corrosion characteristics to packaging material;

- Part 17. Density;

- Part 18. Specific optical rotation;

- Part 19. Boiling point;

- Part 20. Melting point/melting range;

- Part 21. Viscosity;

- Part 22. Solubility on organic solvents;

Guidance on the determination of physico-chemical

properties of pesticides Part 16. Corrosion

characteristics to packaging material

1 Scope

This Part specifies the basic requirements for test methods and test report

contents for the determination of corrosion characteristics of pesticide products

to their packaging materials.

This Part is applicable to the determination of corrosion characteristics of raw

pesticides and preparations to the packaging material in pesticide registration

tests.

2 Term and definition

For the purpose of this document, the following term and definition apply.

2.1

corrosion characteristics to packaging material

It refers to the property that the electrochemical or chemical reaction of the test

object with the packaging material results in destruction or performance

degradation of the packaging material.

3 Test methods

Safety tips. The personnel using this Part shall have practical experience

in laboratory work. This Part does not indicate all security issues. It is the

user's responsibility to take appropriate safety and health measures and

to ensure compliance with the relevant national regulations.

90 % of the container space.

The packaging container to which the test object is added is stored at the test

temperature. The following storage conditions may be selected. store at (54 ±

2) °C for 2 weeks, store at (50 ± 2) °C for 4 weeks, store at (45 ± 2) °C for 6

weeks, store at (40 ± 2) °C for 8 weeks, store at (35 ± 2) °C for 12 weeks and

store at (30 ± 2) °C for 18 weeks. Or combined with the normal temperature

storage stability test.

After the test is completed, use the reagents listed in 3.4 to clean the packaging

container, but it shall avoid damage to the protective layer of the packaging

container. Then rinse with water and dry according to 3.5.1.1.

INSPECT and DESCRIBE the appearance of the cleaned packaging container,

OBSERVE whether there is pitting, discoloration, rust, leakage, etc. USE the

analytical balance to weigh the cleaned packaging container (g2).

Blank test. USE a packaging container that has not been exposed to the test

object as a blank sample, USE the analytical balance to weigh it (w1), and then

PERFORM the same cleaning and drying process. WEIGH the cleaned blank

packaging container (w2).