ICS 67.100.20 
 
Reference number  
DRS 490-1: 2021  
© RSB 202 2 
  
 RWANDA 
STANDARD  DRS  
490-1  
 
First edition  
2022-mm-dd 
 
Tallow oil  — Specification  — 
Part 1: Animal origin  
   
DRS 490-1:202 2 
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 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 
editio n 
 
 
 
 
 
 
 
 
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ePortal: www.portal.rsb.gov.rw   DRS 490-1:202 2 
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 Contents  Page 
 
 
1 Scope  ................................ ................................ ................................ ................................ .............  1 
2 Normative references  ................................ ................................ ................................ ...................  1 
3 Terms and definitions  ................................ ................................ ................................ ..................  2 
4 Types  ................................ ................................ ................................ ................................ .............  2 
5 Requirements  ................................ ................................ ................................ ................................  2 
5.1 General requirements  ................................ ................................ ................................ ..................  2 
5.2 Specif ic requirements  ................................ ................................ ................................ ..................  2 
6 Packaging  ................................ ................................ ................................ ................................ ...... 3 
7 Labelling  ................................ ................................ ................................ ................................ ........  3 
8 Sampling  ................................ ................................ ................................ ................................ ....... 3 
 
 DRS 490-1:202 2 
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 Foreword   
Rwanda Standard s are prepared by Technical Committees and approved by Rwanda 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 Standards adopted 
by technical committees are ratifie d by members of RSB Board of Directors for publication and gazettment as 
Rwanda Standards.  
DRS 490-1 was prepared by Technical Committee RSB/TC 024, Organic and inorganic chemicals . 
In the preparation of this standard, reference was made to the following s tandard:  
IS 887: Specification for animal tallow  
The assistance derived from the above source is hereby acknowledged with thanks.  
DRS 490 consists of the following parts, under the general title Tallow oil  — Specification : 
⎯ Part 1: Animal origin  
⎯ Part 2:  Vegetable origin  
 
Committee membership  
The following organizations were represented on the Technical Committee on Organic and inorganic chemicals 
(RSB/TC 024) in the preparation of this standard.  
 
University of Rwanda -College of Science and Technology (UR -CST)  
University of Rwanda -College of Education (UR -CE) 
Rwanda Inspectorate, Competition and Consumer protection Authority (RICA)  
Rwanda Forensic Laboratory (RFL)  
Standards for Sustainability (SFS)  
HORIZON - SOPYRWA  DRS 490-1:202 2 
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 National Industrial Research and Development Agency (NIRDA)  
Uburanga Products Ltd  
Rwanda Standards Board (RSB) – Secretariat  
 DRS 490-1: 202 2 
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 Tallow oil  — Specification  — Part 1 : Animal origin  
1 Scope  
This working draft specifies requirements, sampling and test methods for animal tallow o il for textile industry 
and industrial uses . 
It does not cover tallow oil meant for human consumption.  
2 Normative references  
The following documents are referred to in the text in such a way that some or all of  their content constitutes 
requirements 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.  
RS ISO 662 , Animal and vegetable fats and oils — Determination of  moisture and volatile  matter content  
RS ISO 663, Animal and vegetable fats and oils — Determination of insolub le impurities content  
RS EAS 847 -9, Cosmetics — Analytical methods — Part 9: Determination of colou r— Automatic method — 
Amendment 1  
RS ISO 3657, Animal and vegetable fats and oils — Determination of saponification value  
RS ISO 3961,  Animal and vegetable fats and oils — Determination of iodine value  
RS ISO 660, Animal and vegetable fats and oils — Determination of acid value and acidity  
RS EAS 847 -5, Cosmetics — Analytical methods — Part 5: Determination of unsaponifiable matter  
RS ISO  935, Animal and vegetable fats and oils — Determination of titre  
RS ISO 6321: 2002 Animal and vegetable fats and oils — Determination of melting point in open capillary tubes 
(Slip point)  
RS ISO 6320: 2017 Animal and vegetable fats and oils — Determination  of refractive index  
RS ISO 5555, Animal and vegetable fats and oils — Sampling  
 DRS 490-1: 202 2 
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 3 Terms and definitions  
For the purposes of this standard, the following terms and definitions . 
3.1 
animal tallow  oil 
hard fat obtained from parts of the bodies of cattle, sheep, or horses, and used in foodstuffs or to make candles, 
leather dressing, soap, and lubricants.   
3.2 
rendering  
a process  that converts  animal products  into more u seful materials  such as a fat commodity  (yellow grease , 
choice white grease, bleachable  tallow , etc.) and a protein meal ( meat and bone meal , poultry byproduct meal , 
etc) 
4 Types  
There are two types of the product as follows:  
a) Type 1 — meant primarily for textile industry, it is a tallow oil which is derived from the bodies of sheep 
by rendering or solvent extraction.   
b) Type 2 — meant  for other industrial uses , it is a tallow oil which is derived from the bodies of cattle, 
sheep or goat or a mixture thereof  by rendering or solvent extraction  
5 Requirements  
5.1 General requirements  
5.1.1  The product of both types shall not have any marked rancid odour.  
5.1.2  The product shall be clear on melting point and free from adulterant s, sediment and other foreign 
matter, separated water and added colouring and flavouring substance.  
5.1.3  The clarity of the material shall be judged by absence of any turbidity after keeping the melted and 
filtered sample at 55 ºC for 24 hours.  
5.2 Specific requirem ents 
The product shall also comply with the requirements given in table 1 when tasted according to methods 
described therein . DRS 490-1: 202 2 
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 SN Characteristics   
Requirements  Test method  
Type 1  Type 2  
i. Moisture content, %by mass, max  1.0 1.0       RS ISO 662  
ii. Colour, r+5R not deeper than  15 40   RS EAS 847 -9 
iii. Refractive index  1.448 -1.460        RS ISO 6320  
iv Melting point , ºC 45-50 RS ISO 6321  
v. Saponification value  192-202 RS ISO 3657  
vi. Iodine value  28-40 30-56 RS ISO 3961  
vii. Acid value, max  2 10       RS ISO 660  
viii. Unsaponifiable matter, % by 
mass, max  0.5 1.0   RS EAS 847 -5 
ix. Titre of fatty acid, ºC 30-38       RS ISO  935  
 
6 Packaging  
The product shall be packaged in suitable, well -closed containers as agreed between the purchaser and the 
supplier . 
7 Labelling  
The containers shall be securely closed and legibly and indelibly marked with the following information:  
a) manufacturer’s name  
b) recognized trade mark, if any  
c) name and type of the product  
d) net weight  
e) batch numbe r; 
f) date of manufacture  and 
g) date of expiry  
8 Sampling  
Sampling shall be done in accordance  with RS ISO 5555  DRS 490-1: 202 2 
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