ICS 65.12O  
 
 Reference number  
DRS 472 : 2021  
© RSB 2021  
  
 RWANDA 
STANDARD  DRS  
472 
 
First edition  
2021 -mm-dd 
 
Calcium phosphates feed g rade  — 
Specification  
   
DRS 472 : 2021  
©RSB 2021  - All rights reserved                  ii 
 In order to match with technological development and to keep continuous progress in industries, 
standards are subject to periodic review. Users shall ascertain that they are in possession of the latest 
edition  
 
 
 
 
 
 
 
 
© RSB 2021  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized 
in any form or by any means, electronic or mechanical, including photocopying and microfilm, without 
prior written permission from R SB. 
Requests for permission to reprodu ce this document should be addressed to : 
Rwanda Standards  Board  
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ePortal: www.portal.rsb.gov.rw  DRS 472 : 2021  
iii                ©RSB 2021  - All rights reserved  
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ...................  iv 
1 Scope  ................................ ................................ ................................ ................................ .............  1 
2 Normative references  ................................ ................................ ................................ ...................  1 
3 Terms and definitions  ................................ ................................ ................................ ..................  1 
4 Requirements  ................................ ................................ ................................ ................................  2 
4.1 Description  ................................ ................................ ................................ ................................ .... 2 
4.2 Specific requi rements  ................................ ................................ ................................ ..................  2 
5 Heavy metal contaminants  ................................ ................................ ................................ ..........  2 
6 Packaging  ................................ ................................ ................................ ................................ ...... 3 
7 Labelling  ................................ ................................ ................................ ................................ ........  3 
8 Sampling  ................................ ................................ ................................ ................................ ....... 3 
 DRS 472 : 2021  
©RSB 2021  - All rights reserved                  iv 
 Foreword  
Rwanda Standard s are prepared  by Technical Committees and approved by R wanda Standards Board (RSB) 
Board  of Directors in  accordance with the procedures of RSB, in compliance with Annex 3 of the WTO/TBT 
agreement on the preparation, adoption and application of standards.  
The main task of technical committees is to prepare national standards.  Final Draft Rwanda S tandards adopted 
by Technical committ ees are ratifie d by me mbers of RSB Board of Director s for publication and gazettment as 
Rwanda Standards.  
DRS 472  was prepared by Technical Committee RSB/TC 008 on Animal feeding stuffs . 
In the preparation of this standard, reference was made to the following standard s: 
1) IS 5470: Dicalcium Phosphate, Animal Feed Grade — Specification  
2) KS 2577 : Calcium phosphates Feed Grade — Specification  
The assistance de rived from the above source is hereby acknowledged with thanks.  
Committee membership  
The following organizations were represented on the Technical Committee on  Animal feeding stuffs (RSB/TC 
008) in the preparation of this standard.  
Agrotech Ltd  
Cheeter Group Ltd  
Gasabo District  
Gorilla Feeds Ltd  
Intertek Morocco  
Nyabihu TVET School  
Nyarutarama Business Incubation Centre  
Prodev Ltd  
Rwanda  Agriculture and Animal Resources Development Board  (RAB)  
Rwanda Best Farm  DRS 472 : 2021  
©RSB 2021  - All rights reserved                  ii 
 Rwanda Food and Drug Authority (RFDA)  
Zamura Feeds Ltd  
Rwanda  Standards Board ( RSB) – Secretariat  
  DRS 472: 2021  
1                ©RSB 2021  - All rights reserved  
 Calcium phosphates Feed Grade  — Specification  
1 Scope  
1.1 This Draft Rwanda Standard specifies  the requirements , sampling and test methods  for calcium 
phosphates feed grade for use in animal feeding . 
1.2 This standard applies  to all calcium phosphates fed directly to the animal or used for manufacturing 
mineral mixtures and feeds.  
2 Normative references  
The following referenced documents are i ndispensable for the application 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 952.14, Mercury in food — Colorimetric d ithizone method  
AOAC 957.22, Arsenic (Total) in Feeds — Colorimetric Test  
AOAC 974.27 , Cadmium, Chromium, Copper, Iron, Lead, Magnesium, Manganese, Silver, and Zine in Water 
—Atomic Absorption Spectrophotometric Method  
AOAC 975.08, Fluorine in animal feed — Distillation method  
AOAC 999.11, Lead,Cadmium,Copper,Iron,and zinc in foods. Atomic absorption spectrophotometry after dry 
ashing  
RS ISO 5985, Animal feeding stuffs — Determination of ash insoluble in hydrochloric acid  
RS ISO 6490 -1, Animal feeding stuff s — Determination of calcium content — Part 1: Titrimetric method  
RS ISO 6491, Animal feeding stuffs — Determination of phosphorus content — Spectrometric method  
RS ISO 6496, Animal feeding stuffs — Determination of moisture and other volatile matter conte nt 
RS ISO 6497, Animal feeding stuffs — Sampling  
3 Terms and definitions  
For the purposes of this standard, the follow ing terms and definitions apply.   
©RSB 2021  - All rights reserved                  2 
 3.1 
MonoCalcium Phosphate (MCP)  
inorganic compound with chemical formula: Ca(H2PO4)2  
3.2 
Di-Calcium Phosphate (DCP)  
type of calcium phosphate which is di -basic. It is usually found as dihydrate, with the chemical formula but can 
be thermally converted into anhydrous form  
4 Requirement s 
4.1 Description  
4.1.1  The material shall consist of naturally o ccurring or synthetic Calcium Phosphate. It shall be in the form 
of free flowing per or granules. It shall be free from visible foreign matter and toxic substances.  
4.1.2  The per form shall be of such fineness that not less than 98.5 percent by weight of t he material shall 
pass through 45 Micron sieve.  
4.2 Specific requirements  
Calcium phosphates Feed Grade shall co mply with the specific requirements given in table 1 when tested in 
accordance with test methods specified therein.  
Table 1Specific r equirements for Calcium phosphates Feed Grade  
S/N Parameter (Percentage by weight)    Limits  Test method  
DCP  MCP  
i.  Moisture percentage by weight, (Max)  5 5 RS ISO 6496  
ii.  Calcium (as Ca) percentage by weight,  20-23 20-23 RS ISO 6490 -1 
iii.  Phosphorus (as P) percentage by weight, (Min)  18 18 RS ISO 6491  
iv.  Fluorine(as F) percentage by weight, (Max)  0.2 0.2 AOAC 975.08  
v.  Acid insoluble ash percentage by weight, Max  1.0 1.0 RS ISO 5985  
5 Heavy metal contaminants  
The heavy metal contaminants, if present, shall not exceed t he limits stipulated in Table 2 when tested in 
accordance  with test methods specified therein.  
 DRS 472: 2021  
3                ©RSB 2021  - All rights reserved  
 Table 2 Heavy metal contaminants limits for Calcium phosphates Feed Grade  
S/N Parameter  Maximum l imits , mg/kg  Test method  
i.  Arsenic, As  20.0 AOAC 957.22  
ii.  Cadmium, Cd  30.0 AOAC 999.11  
iii.  Mercury, Hg  1.0 AOAC 952.14  
iv.  Lead, Pb  30.0 AOAC 999.11  
v.  Chromium  500 AOAC  974.27  
6 Packaging  
5.1  Calcium phosphates feed grade for sale shall be packed in containers which are of sufficient strength 
and sufficiently sealed so as to withstand reasonable handling without tearing, bursting or falling open during 
normal handling and transportation.  
5.2  Each container for Calcium phosphates feed grade shall be clean and  free from visible indications of 
contam ination and infestations  
7 Labelling  
Each package of Calcium phosphates feed grade shall be legibly and indelibly labelled with the following:  
a) name of the feed as “Mono Calcium Phosphate (M CP), Di -Calcium Phosphate (DCP) ”;  
b) name and physical address of the manufacturer;  
c) net weight in metric units;  
d)  directions and precautions for use;  
e) batch number /lot identification;  
f) manufacturing date;  
g) expiry date; and 
h) storage instructions . 
8 Sampling  
Sampling of calcium phosphates feed grade shall be in accordance RS ISO 6497  DRS 472 : 2021  
Price based on 3 pages  
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