DEAS 1162 :2023  
ICS 65.080  
© EA C 2023                                                                                                                               First Edition 2023  
 
DRAFT EAST AFRICAN STANDARD  
Fertilizers – Mono -Ammonium Phosphate and Di -Ammonium Phosphate 
(MAP & DAP) – Specification  
EAST AFRICAN COMMUNITY  
 
 
 
 
 
 
 
  
   
 DEAS 1162 :2023  
ii © EAC  2023  – All rights reserved  
 Copyright notice  
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Violators may be pe rsecuted  DEAS 1162 :2023  
© EAC 2023  – All rights reserved  iii 
 Foreword  
Development of the East African Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, tr ade barriers that are encountered when goods and services are exchanged 
within the Community will be removed.  
In order to achieve this objective, the Community established an East African Standards Committee mandated 
to develop and issue East African Stan dards.   
The Committee is composed of representatives of the National Standards Bodies in Partner States, together 
with the representatives from the private sectors and consumer organizations. Draft East African Standards 
are circulated to stakeholders thro ugh the National Standards Bodies in the Partner States. The comments 
received are discussed and incorporated before finalization of standards, in accordance with the procedures 
of the Community.  
East African Standards are subject to review, to keep pace w ith technological advances. Users of the East 
African Standards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible for this document is Technical Committee EASC/TC 0 20, Agriculture and 
agrochemicals.  
 DRAFT EAST AFRICAN STANDARD  DEAS 1162 :2023  
 
© EAC 2023  – All rights reserved  1 
 Fertilizers – Mono -Ammonium Phosphate and Di -Ammonium Phosphate 
(MAP & DAP) – Specification  
1 Scope  
This draft East African  standard prescribes requirements, methods of sampling and tests for Mono -Ammonium 
Phosphate and  Di-Ammonium Phosphate (MAP & DAP) fertilizers.  
2 Normative references  
The following referenced documents are indispensable for the application of this document. For dated 
references, only the edition cited applies. For undated references, the latest editi on of the referenced 
document (including any amendments) applies.  
ISO 8157, Fertilizers and Soil Conditioners – Vocabulary  
EAS 913, Fertilizer – Methods of sampling  
DAES 1166: 2023 , Code of Practice for Handling and S torage of Bagged Fertilizer or f ertiliz er 
supplement sAOAC 965.08, Water (free) in fertilizers — Vacuum -desiccation  
ISO 17318, Fertilizers and soil conditioners — Determination of arsenic, cadmium, chromium,  
lead and mercury contents ISO 8397, Solid fertilizers and soil conditioners – Test sievi ng 
ISO 53 15, Fertilizers – Determination of total nitrogen content – Titrimetric method after distillation   
ISO 5314, Fertilizers  – Determination of ammoniacal nitrogen content – Titrimetric method after distillation  
ISO 5316, Fertilizers  – Extraction of water -soluble phosphate  
ISO 6598, Fertilizers - Determination of phosphorous content - Quinolinephosphomolybdate - Gravimetric 
method  
AOAC2006.03 , Arsenic,  Cadmium,  Cobalt,  Chromium,  Lead,  Molybdenum,  Nickel,  and selenium in fertilizers  
— Microwave digestion and inductively coupled plasma -optical emission spectrometry  
ISO 14820 -1, Fertilizers and liming materials - Sampling and sample preparation - Part 1: Sampling  
 ISO 148 -2, Fertilizers and liming materials - Sampling and sample preparation - Part 2: Sample preparation  
ISO 7409, Fertilizers  -Marking - Presentation and declarations  
3 Terms and definitions  
For the purpose of this Tanzania standard, terms and definitions given in ISO 8157  shall apply  
  
2 © EAC  2023  – All rights reserved  
 4 Requirements  
4.1 Physical  requirements  
4.1.1 M AP and DAP f ertilizers shall be;  
 
a) in the form of crystals or granules; the fertilizers shall be  
b) free flowing and from any foreign matter.  
 
4.1.2 The particle size of MAP and DAP fertilizers, when tested in accordance ISO 8397, shall be such that 
not less than 90% by mass of the material shall pass through 4 mm sieve and be retained on 1 mm sieve. Not 
more than 5% shall be below 1 mm sieve.  
 
4.1.3 The colour of MAP&DAP fertilizers shall be uniform.  
 
 
4.2 Chemical  requirements  
The MAP and DAP fertilizers shall c omply with the requirements given in Table 1.  
 
Table 1 – Chemical requirements for Mono -Ammonium Phosphate (MAP) and Di – Ammonium 
Phosphate (DAP) fertilizers  
 
          Characteristic                            Requirement   
  MAP    DAP   Test Method  
Amm oniacal nitrogen, as N, 
per cent by mass, min 
 
Available  phosphates, as 
P2O5, per cent by mass, min 
 
Water soluble phosphates, 
as P 2O5, per cent by mass, 
min 
 
Moisture content, per cent by 
mass, max      11 
 
 
     50 
 
 
     44 
 
 
 
     1.5      18 
 
 
      46 
 
 
      44 
 
 
 
      1.5  
 ISO 5314  
 
 
ISO 6598  
 
 
ISO 53 15 
 
 
 
AOAC 965.08  
. 
5 Contaminants  
Heavy metal contamination in Single Super Phosphate fertilizer shall not exceed the limits given in table 2 
when determined by the methods prescribed  therein .  
 
Table 2 – Requirements for heavy metal contaminants  
Element                           Requirement  
 Test Method  
Arsenic , mg/kg, max                                       40  ISO 17318  
Cadmium , mg/kg, max                                        45 ISO 17318  
Merc ury, mg/kg, max                                       0.1   ISO 17318  
Selenium , mg/kg, max                                       1 ISO 17318  
Lead , mg/kg, max                                       30 ISO 17318  
Chromium , mg/kg, max                                       500 ISO 17318   
© EAC 2023  – All rights reserved  3 
  
Nickel,        mg/kg, max                                     120              AOAC 2006.03  
 
6 Sampling  
Sampling and sample preparation of MAP&DAP  fertilizers shall be carried out as prescribed in ISO 14820 -1 
and ISO 14820 -2 res pectively   
 
7    Packaging  
The fertilizer shall be packaged in materials that are clean and non -defective that protect the product from 
physical, chemical and moisture contamination and withstand multiple stages of handling (transportation and 
storage).  
 
 
 
8    Labelling  
The fertilizer package shall be legibly and indelibly marked in accordance with ISO 7409 in either English or 
any other official language.  
 
9   Storage  
MAP and DAP  fertilizers shall be stored, handled and transported as prescribed in DEAS 1166: 2023 .  
4 © EAC  2023  – All rights reserved  
 Bibliography  
 India control order 1985 as amended on 2003.  
 TZS 893 , Fertilizers – Mono -Ammonium Phosphate and Di -Ammonium Phosphate (MAP & 
DAP) – Specification  
 
 DEAS 1162: 2023    
 
© EAC 2023  – All rights reserved