DRAFT UGANDA STANDARD  
  DUS 758 
Second  Edition  
2017 -mm-dd 
 
 
 Reference number  
US 758: 2017 
© UNBS 2017   
  
Calcium ammonium nitrate fertilizer — Specification  
 DUS 758: 2017  
ii © UNBS 2017  – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2017  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
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permission from UNBS.  
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Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 758:2017  
© UNBS 2017  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  2 
4.1 General requirements  ................................ ................................ ................................ ...........................  2 
4.2 Specific requirements  ................................ ................................ ................................ ...........................  2 
4.3 Heavy metal contaminati on ................................ ................................ ................................ ..................  2 
5 Packaging  ................................ ................................ ................................ ................................ ...............  3 
6 Weights and Measures regulations  ................................ ................................ ................................ ..... 3 
7 Labelling  ................................ ................................ ................................ ................................ .................  3 
8 Sampling  ................................ ................................ ................................ ................................ ................  3 
Bibliography  ................................ ................................ ................................ ................................ ........................  4 
 DUS 758: 2017  
iv © UNBS 2017  – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UN BS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standa rdisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Tech nical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia, consumer groups, private sector and other interested parties.  
Draft Uganda Standard s adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Stan dards Council.  
This Draft Uganda Standard has been developed as a result of a need to provide guidance to industry in 
production and regulation of Inorganic fertilizers . 
The committee responsible for this document is Technical Committee UNBS/TC 2, Food and  agriculture , 
Subcommittee SC 2 0, Agrochemicals and veterinary drugs . 
This second  edition cancels and replaces the first edition ( US 758:2007 ), which has been technically revised.  
 DRAFT UGANDA STANDARD  DUS 758: 2017  
 
© UNBS 2017  – All rights reserved  1 
 Calcium ammonium nitrate fertilizer — Specification  
1 Scope   
This Draft Ug anda Standard specifies requirements, sampling and test methods for calcium ammonium nitrate 
(CAN) fertilizer . 
2 Normative references   
The following  documents are referred to in the text in such a way that some or all of their content constitutes 
requireme nts of this document. For dated references, only the edition cited applies. For undated references, 
the latest edition of the referenced document (including any amendments) applies.  
AOAC 950.01, Water (Total) in fertilizers  
AOAC 962.01, Calcium and magnesi um in liming materials. EDTA titrimetric methods  
ISO 5315,  Fertilizers — Determination of total nitrogen content -- Titrimetric method after distillation  
ISO 8157 , Fertilizers and soil conditioners —Vocabulary  
ISO 8397 , Solid fertilizers and soil conditioner s— Test sieving  
ISO 8633,  Solid fertilizers — Simple sampling method for small lots  
ISO 8634,  Solid fertilizers — Sampling plan for the evaluation of a large delivery  
ISO 15604,  Fertilizers — Determination of different forms of nitrogen in the same sample, containing nitrogen 
as nitric, ammoniacal, urea and cyanamide nitrogen  
ISO 17318 , Fertilizers and soil conditioners —Determination of arsenic, cadmium, chromium, lead and mercury 
contents  
ISO 25475,  Fertilizers — Determination of ammoniacal nitrogen  
3 Terms and definitions   
For the purposes of this standard, the  terms and  definitions given in ISO 8157  apply.  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http:/ /www.iso.org/obp   
2 © UNBS 2017  – All rights reserved  
 4 Requirements  
4.1 General requirements  
a) The material shall be free from lumps and visible foreign ma tter and shall be free -flowing; and  
b) Particle size: Not less than 90 % of the material shall pass through 4 mm IS sieve and be retained on 
1 mm IS sieve. Not more than 5 % shall be below 1 mm size  when tested in accordance with ISO 
8397 . 
4.2 Specific requirements  
The material shall consi st of homogeneous granules of ammonium nitrate with limestone filler and  shall 
comply with the requirements given in Table 1 when tested with the appropriate method also given in Table 1. 
Table1— Chemical requirements for calcium ammonium nitrate fertilizer  
SN Characteristic  Requirement  Method of test  
i.  Total nitrogen content (as N), % (m/m),  
min 
 26 ISO 5315  
ii.  Ammoniacal nitrogen, per cent by mass of 
total nitrogen  
 50% ISO 25475  
iii.  Nitrate nitrogen, percent by mass of total 
nitrogen  
  50% ISO 15604  
iv.  Calcium and/or magnesium carbonate by 
weight: min 
 18 AOAC 962.01  
v.  Moisture % m/m, max  1 AOAC 950.01  
 
4.3 Heav y metal contamination  
When tested in accordance with the methods specified therein, the heavy metal contaminants shall not 
exceed those indicated in Table 2  
Table 2 — Limits for heavy metal contaminants  
Metal  Maximum limits,  
mg/kg  Test methods  
Arsenic  20 
ISO 17318  Cadmium  7 
Mercury  0.1 
Lead  30 
Chromium  500 
 DUS 758: 2017  
© UNBS 2017  – All rights  reserved  3 
 5 Packaging  
Calcium ammonium nitrate  fertilizer shall be packaged in materials that ensure the product integrity and 
quality and protect it against physical damage, chemical and moisture conta mination.  
6 Weights and Measures regulations  
The fill of the package shall comply with the weight s and measures act  
7 Labelling  
The following information shall be clearly and indelibly marked  in English  on each package or container : 
a) name of the fertilize r as “Calcium ammonium nitrate ”; 
b) name, address and physical location of manufacturer/packer/importer ; 
c) chemical composition of the fertilizer;  
d) nitrogen content of the material as a percentage by weight ; 
e) date of manufacture;  
f) expiry date ;  
g) batch/lot number ; 
h) the net weight of the fertilizer in the package; in metric units ; 
i) storage and h andling instructions ; 
j) risk warning;  
k) instructions  for use ; 
l) disposal instructions  and; 
m) country of origin.  
8 Sampling  
Sampling shal l be done in accordance with ISO 8633 and ISO 8634   
4 © UNBS 2017  – All rights reserved  
 Bibliography  
[1] US 758:2007, Calcium ammonium nitrate fertilizer —— Specification  
[2] FAO Mineral fertilizer Specifications 2010  
[3] MS 1329: Specification for diammonium phosphate.   
[4] Agricultural Chemicals (Control) Act, 2006 (Act No.1 of 2007)  
[5] The Fertilizer Control Regulations, 2010  
 DUS 758: 2017  
© UNBS 2017  – All rights reserved  5 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark i s governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard.  The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Ugan da National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 DUS 758: 2017    
 
ICS 65.080  
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© UNBS 2017  – All rights reserved