ICS 71.100.70  
 
Reference number
DRS 489-5: 2023
© RSB2023
  
 RWANDA 
STANDARD  DRS 
489-5 
 
Second edition  
2023-mm-dd  
 
Oils for cosmetic use  — Specification  
Part 5: Macadamia oil 
   
Formatted:  English (United States)DRS 489-5: 2023 
©RSB 2023- 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 
 
 
 
 
 
 
 
 
© RSB2023 
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  Formatted:  French (France)
Field Code Changed
Formatted:  English (United Kingdom)
Formatted:  French (France)DRS489-5: 2023 
iii                ©RSB2023- All rights reserved 
  Page 
 
Contents 
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  
5 Packaging ............................................................................................................................................... 3  
6 Labelling ................................................................................................................................................. 3  
7 Sampling ................................................................................................................................................ 3  
Annex A (normative)  Determination of critical solution temperature .......................................................... 4  
A.1 Reagent .................................................................................................................................................. 4  
 
A.2 Procedure ............................................................................................................................................... 4  
 
 DRS 489-5: 2023 
©RSB 2023- All rights reserved                  iv 
 Foreword 
Rwanda Standardsarepreparedby 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 ratified by members of RSB Board of Directors for publication and 
gazettment as Rwanda Standards. 
DRS489-5 was prepared by Technical Committee RSB/TC  011, Cosmetics and related products . 
This edition cancels and replaces the firstedition of RS 380:2018, of which has been technically revised. 
DRS 489 consists of the following parts, under the general title Oils for cosmetic use — Specification : 
— Part 1:  Baobab seed oil  
 
— Part 2:  Chia seeds oil 
 
— Part 3: Passion fruits (maracuja) seed oil  
 
— Part 4: Castor oil 
 
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 
University of Rwanda -College of Science and Technology (UR-CST) 
Rwanda Food and Drugs Authority (Rwanda-FDA) 
Rwanda Inspectorate, Competition and Consumer Protection Authority (RICA) 
Rwanda Forensic Laboratory (RFL) 
Kipharma 
SULFO Industries Rwanda DRS489-5: 2023 
v                ©RSB2023- All rights reserved 
 ORIBUT Company Ltd 
Uburanga products 
Rwanda Medical Supply (RMS) 
Rwanda Standards Board(RSB) – Secretariat DRS 489-5: 2023 
©RSB 2023- All rights reserved                  vi 
 Introduction 
Oils and fats are among the most important cosmetic ingredients and are frequently used for a variety of 
external applications. They can be used directly as skin and hair care products but also as the 
basicsubstances for the manufacture of cosmetic products. Many of the cosmetic and hair care products on 
themarket today rely on hydrocarbon molecules, derived from either mineral or vegetable oils, to provide 
antistatic, plasticiser and viscosity properties. 
Macadamia nuts contain over 75 % of their weight as oil, the remainder is: 9.0 % proteins, 9.3 % 
carbohydrates, 1.5 % moisture, 1.6 % mineral matters and 2.0 % fiber. The kernels of macadamia contain 
vitamin A1, B1, B2, niacin and essential elements such as calcium, iron, phosphorus, magnesium and 
potassium. The oil is a triglyceride oil and contains primarily monounsaturated fats ranging from 80 % up to 84 
%. Macadamia oil contains the highest percentage of mono-unsaturates when compared to both olive and 
canola oils. 
Palmitoleic acid at such a high concentration is rarely found in vegetable oils. This fatty acid is mostly found 
infish oils. Palmitoleic acid is found in macadamia oil in concentrations as high as 21 %. Derivatives of 
macadamia oil in cosmetics include the light emollient ethyl macadamiate and water-soluble PEG-16 
macadamia glycerides. 
Polarity of the oil phase has a great influence on the formulation and properties of the cosmetic 
emulsions.Polarity of the oil phase is considered as an essential factor for the stability of water-in-oil 
emulsions. Polarityof macadamia nut oil was found to be 525.50 nm ± 0.29 nm (SE). This is considered as 
highly polar. Polar oilsmay enhance solubility of oil soluble cosmetic ingredients. Heat stability of emulsions 
prepared with stronglypolar and non-polar oils were found to give emulsions with poor stability which is 
generally experienced withnatural oils. 
Macadamia oil is an  excellent botanical replacement for mink oil in most applications. It is also used for hair.DRS 489-5: 2023 
1                ©RSB2023- All rights reserved 
 Oils for cosmetic use industry — Specification— Part 5:Macadamia oil 
1 Scope 
This Draft Rwanda Standard specifies the requirements, sampling and test methods for macadamia oil for 
cosmetic industry. 
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 editioncited applies. For undated references, 
the latest edition of the referenced document (including any amendments) applies. 
RS EAS 346, Labelling of cosmetics — General requirements 
 
RS EAS 846, Glossary of terms relating to the cosmetic industry 
 
RS EAS 847-2, Cosmetics — Analytical methods — Part 2: Determination of moisture content and volatile 
matter content 
 
RS EAS 847-5, Cosmetics — Analytical methods — Part 5: Determination of unsaponifiable matter 
 
RS EAS 847-7, Cosmetics — Analytical methods — Part 7: Determination of specific gravity 
 
RS EAS 847-9, Cosmetics — Analytical methods — Part 9: Determination of colour 
 
RS EAS 847-10, Cosmetics — Analytical methods — Part 10: Determination of acetyl value and hydroxyl 
value 
RS EAS 847-12, Cosmetics — Analytical methods — Part 12: Determination of flash point by Pensky — 
Martens Closed Cap Tester 
RS EAS 847-13 , Cosmetics — Analytical methods — Part 13: Determination of rancidity 
 
RS EAS 847-16, Cosmetics — Analytical methods — Part 16: Determination of lead, mercury and arsenic 
content 
RS ISO 660, Animal and vegetable fats and oils — Determination of acid value and acidity 
 
RS ISO 663, Animal and vegetable fats and oils — Determination of insoluble impurities content 
 
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 6320, Animal and vegetable fats and oils — Determination of refractive index 
RS ISO 24153, Random sampling and randomisation procedures  
3 Terms and definitions 
For the purposes of this standard, the terms and definitions given in RS 846 and the following apply.  
©RSB 2023- All rights reserved                  2 
 3.1 
macadamia oil or macadamia nut oil 
 
non-volatile oilexpressedfrom the nutmeat of the macadamia ( Macadamia integrifolia ) tree, a 
nativeAustraliannut 
4 Requirements 
4.1 General requirements 
4.1.1 The product shall be macadamia oil obtained from the nut meat of the macadamia tree ( Macadamia 
integrifolia ), by a process of cold expression, followed by a full refining process torender an oil which is light in 
color and mild in odor. 
4.1.2 When examined visually, the product shall be clear and free from sediments and other foreign matter, 
separated water and added colouring and flavouring substances. 
4.1.3 The product shall be free from admixture with other oils. 
4.2 Specific requirements 
4.2.1 Macadamia oil shall comply with the specific requirements given in Table 1 when tested in accordance 
with the test methods specified therein. 
Table 1— Specific requirements for macadamia oil for cosmetic industry 
 
 S/N Characteristic Requirement Test method 
i. Moisture content, % m/m, max.  0.5 RS EAS 847-2  
ii. Insoluble impurities, % m/m, max.  0.25 RS ISO 663  
iii. Colour in a 1” cell on the Lovibond scale, 
expressed as Y + 5R, max. deepness 4.0 RS EAS 847-9  
iv. Refractive index at 20 ºC, range 1.4660 – 1.4700  RS ISO 6320  
v. Specific gravity at 30/30 ºC, range 0.924 -0.930  RS EAS 847-7  
vi. Saponification value, range  190–200 RS ISO 3657  
vii. Iodine value, range  70–80 RS ISO 3961  
viii. Acid value, max. 1.0 RS ISO 660  
ix. Unsaponifiable matter, % m/m, max. 1.5 RS EAS 847-5  
x. Acetyl value, min  143 RS EAS 847-10  
xi. Flash point, ºC(Pensky Martens closed), min.  300 RS EAS 847-12  
xii. Test for rancidity  Shall be free from rancidity  RS EAS 847-13  
xiii. Critical solution temperature,  ºC, max 0 Annex A Formatted:  English (United States)
Formatted:  French (France)
Formatted:  French (France)DRS 489-5: 2023 
3                ©RSB2023- All rights reserved 
 4.2.2 heavy metals contaminants  
Macadamia oil shall comply with the limits for heavy metal contaminants in accordance with Table 2 when 
tested in accordance with the test methods specified therein.  
Table 2— Limits of heavy metals contaminants for macadamia oil 
S/N Characteristics   Requirements 
mg/kg, max Test method 
i. Lead 10 
RS EAS 847-16  ii. Arsenic 2 
iii. Mercury 2 
NOTE1 The total amount of heavy metals as lead, mercury and arsenic, in combination, in the finished 
product should not exceed 10 mg/kg. 
NOTE 2 The heavy metals including lead, mercury and arsenic may be as a result of contamination during 
processing and should not be deliberately added as ingredients  
 
5 Packaging 
The product shall be packaged in suitable well-sealed containers that shall protect the contents and shall not cause 
any contamination or react with the products. 
6 Labelling 
6.1 In addition to the requirements of RS EAS 346, the Material Safety Data Sheet shall be provided. 
6.2 The phrase ‘ For external use only’  shall be conspicuously marked (either printed on the label affixed to 
the container, or lithographed, or stenciled thereon with indelible ink). 
7 Sampling 
Sampling of the product shall be done in accordance with RS 278. 
  
©RSB 2023- All rights reserved                  4 
 Annex A 
(normative)  
 
Determination of critical solution temperature 
A.1 Reagent  
The reagent shall be prepared by diluting ethyl alcohol or rectified spirit with distilled water tillthe 
relativedensity of the mixture at 15.5 ºC is 0.8303 ± 0.0001, when compared with distilled water at the 
sametemperature. De-natured alcohol shall not be used for this test. 
A.2 Procedure 
Mix in a test tube, 1.0 g of the oil, with 4.15 times its mass of the reagent. Upon examination, the solution thus 
obtained shall be perfectly clear at 20 ºC and shall remain clear when cooled and maintained for 5 minutes at 
a temperature of 0 ºC. 
  DRS 489-5: 2023 
5                ©RSB2023- All rights reserved 
 Bibliography 
[1] RS 380:2018, Macadamia oil for cosmetic industry— Specification  
 DRS 380: 2023 
 
Price based on nnnpages 
©RSB2023- All rights reserved