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NY/T 1427-2016: Guidelines for storage stability testing of pesticides at ambient temperature
NY/T 1427-2016
NY
AGRICULTURAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 65.020
B 17
Replacing NY/T 1427-2007
Guidelines for storage stability testing of pesticides at
ambient temperature
ISSUED ON: NOVEMBER 01, 2016
IMPLEMENTED ON: APRIL 01, 2017
Issued by: Ministry of Agriculture of PRC
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Terms and definitions ... 4 
3 Test method ... 5 
4 Test report preparation requirements ... 6 
Appendix A (Normative) Other control items that shall be determined in
pesticide storage stability test at ambient temperature ... 9 
Guidelines for storage stability testing of pesticides at
ambient temperature
1 Scope
This standard specifies the test methods for the storage stability of pesticides
at ambient temperature and the requirements for the preparation of test reports.
This standard applies to the ambient temperature storage stability test for the
registration of pesticide formulations.
2 Terms and definitions
The terms and definitions apply to this document.
2.1
Shelf life
The period for ensuring the quality of pesticide products under specified
storage conditions. During this period, the appearance of the product, the
content of active ingredients, the content of related impurities, the content of
other restricted components, other control items and the integrity of the
product packaging meet the product technical specifications.
2.2
Relevant impurity
Compared with the effective ingredients of pesticides, the impurities of the
pesticide products which are produced during the production or storage
process and are obviously toxic to humans and the environment, or cause
phytotoxicity to applicable crops, or cause agricultural product pollution, or
affect the quality and stability of pesticide products, or cause other adverse
effects.
2.3
Raw data
All original records and documents of the testing institution that recorded the
original observations and investigation results in a test, or their verified
3.5 Testing items
The items to be tested include appearance, sample quality (including packaging)
change rate, active ingredient content and isomer ratio, decomposition product
content (when the effective ingredient decomposition rate is greater than 5%),
related impurity content, contents of other restricted components (safener,
stabilizer, etc.), other necessary control items (see appendix A) of the product
and preparations (see Appendix A). If some solid preparations are packaged in
soluble bags, appropriate indicators such as solubility and long-lasting foaming
of the packaging shall be increased. It shall also be observed whether the
packaging is deformed, leaked, or otherwise corroded.
3.6 Testing method
Adopt the relevant project testing methods of pesticide products as published
by national standards, industry standards and the International Pesticide
Cooperative Analysis Committee (CIPAC), American Association of Analytical
Chemists (AOAC) and other international organizations, or confirmed self-
developed methods.
4 Test report preparation requirements
The test report shall provide sufficient information, at least include the following:
a) Sample description. It shall include the name of the product, dosage form,
batch number, packaging type (such as cylinder, can, aerosol can),
packaging material (such as metal, plastic), net content (mass or volume),
sample quantity.
b) Storage conditions.
1) Storage time: Storage start date.
2) Storage temperature: Monthly average temperature and maximum and
minimum temperature.
3) Other storage conditions: Provide control conditions such as humidity
and light when necessary.
c) Testing method. If the testing method adopted is the method of national
standard, industry standard, enterprise standard or method recognized by
relevant international organizations, it can be directly quoted and give the
name and code of the standard or method. If other test methods are used,
it shall give complete method and method validation process.
d) Test process. It shall give detailed description of the test process.
Appendix A
(Normative)
Other control items that shall be determined in pesticide storage
stability test at ambient temperature
A.1 Solid preparation
A.1.1 Powder DP
Other control items to be tested for powder include:
a) Acidity and alkalinity or pH;
b) Dry seive test.
A.1.2 Dispersible tablet WT
Other control items that shall be tested for dispersible tablets include:
a) Acidity and alkalinity or pH;
b) Disintegration time;
c) Suspension rate;
d) Wet sieve test;
e) Wear rate.
A.1.3 Granule GR
Other control items that shall be tested for granules include:
a) Acidity and alkalinity or pH;
b) Granularity range;
c) Dust;
d) Abrasion resistance (shedding rate or broken rate).
A.1.4 Soluble powder SP
Other control items that shall be tested for soluble powder include:
a) Acidity and alkalinity or pH;
A.1.9 Milk powder EP
Other control items that shall be tested for milk powder include:
a) Acidity and alkalinity or pH;
b) Wetting time;
c) Wet sieve test;
d) Dispersion stability.
A.1.10 Emulsion EG
Other control items that shall be tested for emulsions include:
a) Acidity and alkalinity or pH;
b) Wetting time;
c) Dispersion stability;
d) Wet sieve test;
e) Dust;
f) Wear resistance.
A.1.11 Water dispersible granules WG
Other control items that shall be tested for water dispersible granules include:
a) Acidity and alkalinity or pH;
b) Suspension rate;
c) Wet sieve test;
d) Dispersibility;
e) Dust;
f) Wear resistance.
A.2 Liquid preparation
A .2.1 Ultra-low volume liquid UL
Other control items that shall be measured for ultra-low volume liquids include:
Acidity and alkalinity or pH.
b) Emulsion stability.
A.2.8 Microcapsule suspension agent CS
Other control items that shall be tested for microcapsule suspension agents
include:
a) Contents of free active ingredients;
b) Acidity and alkalinity or pH;
c) Wet sieve test;
d) Suspension rate;
e) Spontaneous dispersion;
f) Dumping.
A.2.9 Microcapsule suspension - water emulsion ZW
Other control items that shall be tested for microcapsule suspension - water
emulsion include:
a) Contents of free active ingredient;
b) Acidity and alkalinity or pH;
c) Wet sieve test;
d) Dispersion stability;
e) Dumping.
A.2.10 Microcapsule suspension - suspension agent ZC
Other control items that shall be tested for microcapsule suspension-
suspension include:
a) Free active ingredient content;
b) Acidity and alkalinity or pH;
c) Wet sieve test;
d) Suspension rate;
e) Spontaneous dispersion;
f) Dumping.
a) Acidity and alkalinity or pH;
b) Miscibility with hydrocarbon oils.
A.3 Seed treatment preparation
A.3.1 Suspended seed coating agent FSC
Other control items that shall be tested for suspension seed coating agents
include:
a) Acidity and alkalinity or pH;
b) Wet sieve test;
c) Suspension rate.
A.3.2 Seed treatment dry powder DS
Other control items that shall be tested for dry seed treatment powder include:
a) Acidity and alkalinity or pH;
b) Dry sieve test;
c) Adhesion.
A.3.3 Seed treatment dispersible powder WS
Other control items that shall be tested for seed treatment dispersible powders
include:
a) Acidity and alkalinity or pH;
b) Wet sieve test;
c) Adhesion.
A.3.4 Seed treatment emulsion ES
Other control items that shall be tested for seed treatment emulsion include:
a) Acidity and alkalinity or pH;
b) Emulsion stability;
c) Adhesion.
A.3.5 Seed treatment suspension agent FS