KENYA STANDARD            KS 2424 : 2018 
           
 
 
 
 
 
 
 
 
 
 
 
 Monoammonium phosphate (MAP) and 
diammo nium phosphate (DAP) fertilizer, 
technical grade  — Specification  
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
        DRAFT STANDARD    AUGUST   2018                                       SECOND EDITION                     
     
         
ii  © KEBS 201 8 — All rights reserved  TECHNICAL COMMITTEE REPRESENTATION  
 
The following organizations were represented on the Technical Committee:  
 
Government Chemist  
Mea Ltd.  
Chemagro Ltd  
Kenya Plant Health Inspectorate Services  (KEPHIS)  
Kenya Agricultural   and livestock research organization  
Yara East Africa Ltd  
Kenya Tea Development Agency  
University of Nairobi  
Ministry of Agriculture, Livestock and fisheries  
Amiran (K) Ltd  
Toyota Tshusho Fertilizers  
Elgon chemicals  
Osho chemi cals 
OCP Kenya Ltd.  
Kel Chemicals  
Kenya Bureau of Standards — Secretariat  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
REVISION OF KENYA STANDARDS  
 
In order to keep abreast of progress in industry, Kenya Standards shall be regularly reviewed. Suggestions 
for improvements to publ ished standards, addressed to the Managing Director, Kenya Bureau of Standards, 
are welcome.  
 
 
 
 
 
© Kenya Bureau of standards, 201 8  
© KEBS 201 8— All rights reserved   iii  
Copyright:  Users are reminded that by virtue of Section 6 of the Copyright Act, Cap. 130 of the Laws of Kenya, copyright s ubsists in all 
Kenya Standards and except as provided under Section 7 of this Act, no Kenya Standard may be reproduced, stored in a retrieva l 
system in any form or transmitted by any means without prior permission in writing from the Managing Director.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
iv  © KEBS 201 8 — All rights reserved  KENYA STANDARD             KS 2424 : 2018          
           
 
 
 
 
 
 
 
 
 
 
 
Monoammonium phosphate (MAP) and 
diammon ium phosphate (DAP) fertilizer, 
technical grade — Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
KENYA BUREAU OF STANDARDS (KEBS)  
 
Head  Office:  P.O. Box 54974, Nairobi -00200, Tel.: (+254 020) 605490, 602350, Fax: (+254 020) 604031  
E-Mail: info@kebs.org,  Web:http://www.kebs.org   
 
Coast Region     Lake Region          Rift Valley Region  
P.O. Box 99376, Mombasa -80100   P.O. Box 2949, Kisumu -40100        P.O. Box 2138, Nakuru -20100  
Tel.: (+254 041) 229563, 230939/40                Tel.: (+254 057) 23549, 22396        Tel.: (+254 051) 210553, 210555  
Fax: (+254 041) 229448    Fax: (+254 057) 21814  
  
© KEBS 201 8— All rights reserved   v  
Foreword  
 
 
This Kenya standard has been prepared by  the technical committee on fertilizers and soil 
conditioners under the guidance of the standards projects committee in accordance with 
the procedures of the Kenya Bureau of standards . 
 
 
The rapid expansion  of horticulture  and Irrigated  farming has resulte d in  development of 
new technologies that aim at maximising nutrient use efficiency and offer opportunities for 
quick responses to plants nutrients needs. This has resulted to a need to develop special 
fertilizers that can be applied using these new techn ologies.  
 
 Like other fertilizer products, environmental aspects related to fertilizer raw materials have 
been taken care of.Thus limits for heavy metals have been specified. Recent Association 
of official Analytical chemists (AOAC) methods of analysis hav e been adopted.  
 
 
 
During the preparation of this standard, reference was  made to the following document : 
 
 
1. 2012 , FAO  Mineral fertilizer recommendations.  
2. EU Cadmium limits ,2018  
 
 
 
 
Acknowledgement is hereby made for assist ance derived from the above sourc e 
 
 
  
© KEBS 201 8 — All rights reserved                                                                                                                  1 KENYA  STANDARD  KS 2424 : 2018                   
 
 
Monoammonium phosphate (MAP) and diammonium phosphate (DAP ) fertilizer, 
technical grade  —Specification  
 
1 Scope  
 
This Kenya Standard specifies  the requirements and  prescribes the methods  of test for 
Monoammonium  phosphate (MAP) and diammonium phosphate (DAP) , technical  grades 
of fertilizers.  
 
2 Requirements  
 
2.1 Description   
 
The fertilizer  shall be free flowing , in form of granules , crystal ,   or prills, free from any 
foreign matter and shall not cak e on storage   
 
2.2 Physical  
The fertilizer product shall be fully water  soluble . 
 
2.3       Chemical  
 
The fertilizers shall com ply with the compositional limits specified  in Table 1.  
 
Table 1 — Compositional limits  
 
SL NO  Characteristic  Requirement/lim
its   Test 
method  MAP  DAP  
i) Total nitrogen, % (m/m), min.  11.5. 20.5 AOAC  
iii) Available phosphates, as P 2O5, % (m/m), 
min. 60 52.5 AOAC  
iv) Moisture, % (m/m), max.  0.5 0.5 AOAC  
v) Insoluble matter,%(m/m) ,  Max 0.5 0.5 AOAC  
vi) pH(1% solution),,min  4 7 AOAC  
 
 
 
 
 
 
 
 
 
 
  
  © KEBS 201 8— All rights reserved    
2.4      Heavy metal contaminants  
 
The heavy metal  contaminants, if present, shall not exceed the limits stipulated in Table 2.  
 
 
 
 
 
 
 
 
 
 
 
Table 2 — Heavy metal contaminants limits  
 
 
 
 
 
 
 
 
 
  
 
 
 
3 Packaging and labelling  
3.1 Packaging   
 
3.1.1The fertilizer shall be  packaged in materials that ensure the product integrity and quality 
and protect it against physical damage, chemical and moisture contamination.  
 
3.1.2. The fill of the package shall comply with the weight and measures act CAP 513 of the 
laws of Kenya  
 
3.1.3 The disposal of used package and condemned fertilizer shall comply with EMCA 1999 
no.8 of the disposal of solids and liquid wastes  
 
3.2 Marking/Labelling  
Marking/labelling of fertilizer package shall include the following information:  
a) name and physical ad dress of manufacturer/packer/importer;  
b) name of the fertilizer, namely MAP or   DAP fertilizer;  ‘technical grade’  SL NO  Parameter  Limits in ppm  Test method  
i) Arsenic, As, ma x. 20.0 AOAC  
ii) Cadmium, Cd, 
max.  15.0 AOAC  
iii) Mercury, Hg, 
max.  0.1 AOAC  
iv) Selenium, Se, 
max.  1.0 AOAC  
v) Lead, Pb, max.  30.0 AOAC  
vi Chromium, Cr. 
Max.  500.0  AOAC   
 
  3 c) guaranteed percentages of nutrient element nitro gen(N) and available phosphates  
(P2O5) 
d) date of manufacture  
e)  expiry date;  
f) The form in which the  nutrient is present.  
g) the net weight of the fertilizer in the package;  
h) lot number or batch number;;  
i) handling instructions;  
j) Country  of origin.  
 
4 Certificate of analysis   
A certificate of analysis shall accompany each consignment.  
 
 
5 Sampling  
This shall be car ried out as outlined in ISO standards 8633 and 8634.  
 
ISO 8633 -Solid fertilizers -- Simple sampling method for small lots  
ISO 8634 - Solid fertilizers -- Sampling plan for the evaluation of a large delivery