ICS 71.100.70  
 
 
Reference number  
DRS  282: 2021  
© RSB 2021  
  
 RWANDA 
STANDARD  DRS  
282  
 
Second edition  
2021 -mm-dd 
 
Pure glycerine for cosmetic use — 
Specification  
   
DRS 282: 2021  
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    ©RSB2021 - All rights reserved  
 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 RSB.  
Requests for permission to reproduce this document should be addressed to:  
Rwanda Standards Board  
P.O Box 7099 Kigali -Rwanda  
KK 15 Rd, 49  
Tel. +250 788303492  
Toll Free: 3250  
E-mail: info@rsb.gov.rw  
Website: www.rsb.gov.rw  
ePortal:  www.portal.rsb.gov.rw  DRS 282: 2021  
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 Contents  
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  1 
4.1 General requirements  ................................ ................................ ................................ ...........................  1 
4.2 Specific requirements  ................................ ................................ ................................ ...........................  1 
5 Packaging and labelling ................................ ................................ ................................ ........................  2 
5.1 Packaging  ................................ ................................ ................................ ................................ ...............  2 
5.2 Labelling  ................................ ................................ ................................ ................................ .................  2 
6 Sampling  ................................ ................................ ................................ ................................ ................  3 
Annex  A (normative)  Determination of fatty acids and esters ................................ ................................ ...... 4 
A.1 Apparatus  ................................ ................................ ................................ ................................ ...............  4 
A.2 Reagents  ................................ ................................ ................................ ................................ ................  4 
A.3 Procedure  ................................ ................................ ................................ ................................ ...............  4 
A.4 Calculation  ................................ ................................ ................................ ................................ ....................  4 
 DRS 282: 2021  
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 Foreword  
Rwanda Standards are prepared by Te chnical 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 tec hnical committees is to prepare national standards. Final Draft Rwanda Standards 
adopted by Technical committees are ratified by members of RSB Board of Directors for publication and 
gazettment as Rwanda Standards.  
DRS 282 was prepared by Technical Committ ee RSB/TC 011, Cosmetics and related products.  
In the preparation of this standard, reference was made to the following standard (s):  
MS 557: 2015 Glycerine for cosmetic use — Specification  
The assistance derived from the above source is hereby acknowledged  with thanks.  
This second edition cancels and replaces the first edition (RS  282: 2015), which has] been technically revised.  
Committee membership  
The following organizations were represented on the Technical Committee on Cosmetics and related products  
(RSB/TC 011) in the preparation of this standard.  
Paragraph of participants  
HORIZON - SOPYRWA Ltd  
University of Rwanda / College of Sciences and Technology (UR/CST)  
Rwanda Inspectorate, Competition and Consumer protection Authority (RICA)  
Rwanda Food and Drugs Authority (RFDA)  
Rwanda Forensic Laboratory (RFL)  
Rwanda Medical Supply Ltd ( RMS)  
UBURANGA PRODUCTS LTD  
ORIBIT Company Ltd  DRS 282: 2021  
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 SULFO Rwanda Industries Ltd  
Beauty Makers Association (BMA)  
KANHAN Cosmetics Ltd  
Rwanda Investigation Bureau  (RIB)  
Rwanda Stan dards Board (RSB) – Secretariat  
  DRS 282 : 2021  
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 Pure glycerine for cosmetic use — Specification  
1 Scope  
This Draft Rwanda Standard specifies the requirements, sampling and test methods for glycerine used as a 
cosmetic . 
2 Normative references  
The following documents are referred to in the text in such a way that some or all of their content constitutes 
requirem ents 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.  
ASTM D 7637 -10 Determination of glycerine assay by titration  
 
RS ISO 2271 6, Cosmetics — Good Manufacturing Practices (GMP) — Guidelines on good manufacturing  
Practices  
 
ISO 5809, Starches and derived products — Determination of sulphated ash  
 
RS EAS 104 , Alcoholic beverages — Methods of sampling and test  
RS EAS 123, Distilled water — Specification  
3 Terms and definitions  
For the purposes of this standard, the terms and definitions given in RS EAS 846 apply.  
4 Requirements  
4.1 General requirements  
4.1.1  This type of glycerine shall consist of glycerol which is clear, colourless, odourless, h ygroscopic syrupy 
liquid with a sweet taste (that is followed by a sensation of warmth) and free from visible impurities and 
sediments.  
4.1.2  The product shall be produced, prepared and handled in accordance with RS ISO 22716  
4.2 Specific requirements  
The product sh all comply with the specific requirements given in table 1 when tested in accordance with the 
methods indicated therein.  DRS 282 : 2021  
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Table 1— Specific requirements for pure glycerine for cosmetic use  
S/N  
Characteristic  
 Requirements  Methods of test  
1  
Glycerol content, % (W/W), min  98.0 ASTM D 7637 part 10  
2 Specific gravity at  25°C in air, min  1.2627  RS EAS 847 -7 
3 Ash % w/w, max  0.01 RS EAS 847 -15 
4 Fatty acids and esters, calculated as Na 20, % w/w  0.02 Annex A  
 
Table 2— Heavy metal contaminants  
Heavy metal  Maximum limits a 
mg/kg  Method of test  
Lead ( as Pb)  10 
RS EAS 847 -16 Arsenic (as As)  2 
Mercury (as Hg)  2 
a The total amount of heavy metals as lead, mercury and arsenic, in combination in the product shall not exceed 10 mg/kg.  
 
5 Packaging  and labelling  
5.1 Packaging  
5.1.1  The glycerine shall be packaged in suitable airtight containers that are strong enough to withstand 
normal handling and transportation and that can prevent contamination and deterioration.  
5.1.2  The containers shall be examined for damag e or contamination on receipt, including examination of 
integrity of seals when indicated.  
5.2 Labelling  
Label securely fixed to the container shall be legibly and indelibly marked with the following information:  
a) name of the product;  
b) manufacturer's name, addre ss (preferably postal address) and recognized trade mark;  
c) volume of the product in the package;  DRS 282 : 2021  
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 d) batch identification; and the directions for use;  
e) date of manufacture and expiry date;  
f) net weight; and  
g) word “pure” shall be indicated  
 
6 Sampling  
Sampling shall be done in accordance with RS 278.  
 DRS 282 : 2021  
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 Annex  A 
(normative)  
 
Determination of fatty acids and esters  
A.1 Apparatus  
A.1.1  Round -bottomed flask , 500 -ml capacity  
A.1.2  Conic  pH meter  
A.2 Reagents  
A.2.1  Sodium hydroxide solution, 0.25 N, accurately standardized  
A.2.2  Sulphuric acid , 0.25 N accurately standardized  
A.2.3 Phenolphthalein indicator solution . 
A.3 Procedure  
A.3.1 Weigh accurately about 50 g of the sample into a 500 -ml round -bottomed flask. Add 100 ml of 
hot, carbon dioxide -free water and 1 ml of phenolphthalein indicator solution. If the solution is 
alkaline, neutralize it with sulphuric acid  
A.3.2 Add exactly 15.0 ml of standard sodium hydroxide solution, connect the flask to a reflux 
condenser and heat to boiling. Boil for 5 min, allow to cool slightly and wash down the condenser 
with a l ittle water. Disconnect the flask, close it with a stopper carrying a sodalime tube, and cool.  
A.3.3 Titrate with standardized 0.25 N sulphuric acid and perform a blank determination.  
A.4 Calculation  
The fatty acids and esters (as Na 2O) content, expressed as percent by mass, shall be calculated as 
follows:  
3.1 (B−S)N
M 
where  
 
B  is the volume, in millilitres, of standard sulphuric acid required for the blank;  
 DRS 282 : 2021  
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 S is the volume, in millilitres, of standard sulphuric acid required for the material;  
 
N is the normality of standard sulphuric acid; and  
 
M is the mass, in grams, of the material taken for the test.  
  DRS 282: 2021  
 
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