DRAFT UGANDA STANDARD  
  DUS 2392  
First Edition  
2021 -mm-dd 
 
 
 Reference number  
DUS 2392 : 2021 
© UNBS 2021  
  
Bath oil  — Specification  
 DUS 2392 : 2021  
ii © UNBS 2021  – 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 200 7  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: 256 41 4 505 995  
Fax: 256 41 4 286 123  
E-mail: unbs @infocom.co.ug  
Web: www.unbs.go.ug  DUS 2392 : 2021  
© UNBS 2021  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  2 
4 Requirements  ................................ ................................ ................................ ................................ .........  2 
4.1 General requirements  ................................ ................................ ................................ ...........................  2 
4.2 Specific requirements  ................................ ................................ ................................ ...........................  2 
4.3 Heavy metals  ................................ ................................ ................................ ................................ ..........  2 
4.4 Microbiological requirements  ................................ ................................ ................................ ..........  332 
5 Packaging  ................................ ................................ ................................ ................................ ...............  3 
6 Labelling  ................................ ................................ ................................ ................................ .................  3 
7 Sampling  ................................ ................................ ................................ ................................ ................  3 
Annex  A (normative)  Determination of peroxide value  ................................ ................................ .................  4 
A.1 Principle  ................................ ................................ ................................ ................................ .................  4 
A.2 Reagents  ................................ ................................ ................................ ................................ ................  4 
A.3 Procedure  ................................ ................................ ................................ ................................ ...............  4 
A.4 Calculation  ................................ ................................ ................................ ................................ .............  4 
Bibliography  ................................ ................................ ................................ ................................ ........................  6 
 DUS 2392 : 2021  
iv © UNBS 2021  – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and 
Cooperatives established under Cap 327, of the Laws of Uganda, a s amended.  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO),  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Po int on TBT Agreement of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key sta keholders 
including government, academia, consumer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee revi ews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS/TC 310 , Cosmetics and related 
products .DRAFT UGANDA STANDARD  DUS 2392 : 2021  
 
© UNBS 2021 – All rights reserved  1 
 Bath oil — Specification  
1 Scope  
This Draft Uganda  Standard specifies  the requirements,  sampling and test methods  for bath oils based on 
refined vegetable oils or vegetable oils blends, mineral oils or mixture of the vegetable oils and mineral oils  
meant for application on the skin.  
2 Normative references  
The following referenced documents are indispensable for the application of this document. For dated 
references, only the edition cited applies. For undated references, the latest edition of the refe renced 
document (including any amendments) applies.  
US EAS 346, Labelling of cosmetics —General requirements  
US EAS 377 (all parts), Cosmetics and cosmetic products  
US EAS 846, Glossary of terms relating to the cosmetic industry  
US EAS 847 -2, Cosmetics —Analytical methods —Part 2: Determination of Moisture Content  
US EAS 847 -4, Cosmetics Analytical methods  —Part 4: Determination of acid value and free fatty acids  
US EAS 847 -13, Cosmetics —Analytical methods —Part 13: Determination of rancidity  
US EAS 847 -16, Cosmetics —Analytical methods test —Part 16: Determination of heavy metal content  
US EAS 847 -17, Cosmetics —Analytical methods —Part 17: Physio -chemical tests  
US EAS 847 -18, Cosmetics —Analytical methods —Part 18: Determination of thermal stability  
US ISO 18416,  Cosmetics —Microbiology —Detection of candida albicans  
US ISO 21149,  Cosmetics --Microbiology --Enumeration and detection of aerobic mesophilic bacteria  
US ISO 22716, Cosmetics —Good Manufacturing Practices (GMP) —Guidelines on Good Manufacturing  
US ISO 22717, Cosmetics  —Microbiology —Detection of Pseudomonas aeruginosa  
US ISO 22718, Cosmetics —Microbiology —Detecti on of Staphylococcus aureus  
US ISO 24153, Random sampling and randomisation procedures  
 DUS 2392: 202 1 
2 © UNBS 2021  – All rights reserved  
 3 Terms and definitions  
For the purposes of thi s standard, the following terms and definitions shall apply / the terms and definiti ons 
given in US EAS 846 and  the following apply.  
bath oil  
scented oil added to bath water  
4 Requirements  
4.1 General requirements  
4.1.1  All ingredients used in manufacture of bath oils shall conform to US EAS 377(all part s).  
4.1.2  Bath oils shall be free from any sediment, suspended matter and separated waters.  
4.1.3  Bath oils shall be dermatologically safe and shall not cause irritation or harm to the skin when used as 
intended by the manufacturer.  
4.1.4  Bath oils shall be produced, prepared and handled in accordance with US ISO 22716.  
4.2 Specific requirements  
Bath oils shall conform to the requirements given in Table 1 when tested in accordance with the test methods 
speci fied therein.  
Table 1 —Specific requirements for bath oils  
S.No.  Characteristic  Requirement  Test method  
i) Moisture content % m/m, max.  0.5 US EAS 847 - 2 
ii) Acid value , max.  1.0 US EAS 847 - 4 
iii) Peroxide value, mEq O2/kg , max.  10 Annex A  
 
4.3 Heavy metal contaminants  
4.3.1 Bath oils shall comply with the heavy metal limits  given in Table 2 when tested in accordance with the 
test methods specified therein.  
Table 2 — Heavy metal limits  for bath oils  
Characteristic  Requirement  Test method  
Lead, mg/kg , max.  10  
US EAS 847 -16 Arsenic, mg/kg , max.  2 
Mercury, mg/kg , max.  2 
 
4.3.2 The total amount of heavy metals as lead, mercury and arsenic, in combination, in the finished 
product shall not exceed 10 mg/kg.  DUS 2392: 2021  
© UNBS  2021  – All rights reserved  3 
 4.4 Microbiological requirements  
Bath oils sh all com ply with the microbiological requirements given  in Table 3 when tested in accord ance with  
the test method s specif ied therein.  
Table 3 — Microbiological requirements for bath oils  
Characteristic  Requirement  Test method  
Total viable count for aerobic  mesophyllic 
micro -organisms, CFU/g or CFU/ml, max.  1000 US ISO 21149  
Pseudomonas aeruginosa   Not detectable in 1 ml or 1 g of 
cosmetic product duct US ISO 22717  
Staphylococcus  aureus  Not detectable in 1 ml or 1 g of 
cosmetic product  US ISO 22718  
Candid a albicans  Not detectable in 1 ml or 1 g of 
cosmetic product  US ISO 18416  
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 product.  
6 Label ling 
In addition to the labelling requirements in US EAS 346, the package shall be legibly and indelibly marked with 
the following information:  
a) product name  as “Bath oils” ; 
b) manufacturer's name and physical address;   
c) country of origin;  
d) list of ingredients;  
e) batch number;  
f) net content of the material when packed;  
g) date of manufacture  
h)  date of expiry ; 
i) instructions for use;  
j) storage instructions ; and  
k) warning s/ precautions   
7 Sampling  
Sampling shall be done in accordance with US ISO 24153.  DUS 2392: 202 1 
4 © UNBS 2021  – All rights reserved  
 Annex  A 
(normative)  
 
Dete rmination of peroxide value  
A.1 Principle  
The sample is treated in solution with a mixture of acetic acid and a suitable organic solvent and then with a 
solution of potassium iodide. The liberated iodine is titrated with a standard solution of sodium thios ulphate.  
A.2 Reagents  
A.2.1  Glacial acetic acid  
A.2.2  Chloroform  
A.2.3  Potassium iodide solution, saturated, freshly prepared  
A.2.4  Standard sodium thiosulphate soluti on, 0.01 N  standardized  
A.2.5  Starch indicator solution . Mix 5 g of starch and 0.01 g mercuric iodide with 30 ml of cold water and 
slowly pour it while stirring into one litre of boiling water. Boil for three minutes. Allow to cool and decant off 
the supernatant clear liquid.  
A.3 Procedure  
A.3.1  Weigh accurately about 5 g  of the sample in a  250-ml glass stoppered conical flask and dissolve by  
shaking in 30 ml of a mixed solvent containing 3 parts by volume of glacial acetic acid and 2 parts by volume  
of chloroform. Add 0.5 ml of saturated potassium iodide solution, allow the solution to stan d for exactly one  
minute with occasional shaking, then add 30 ml of water and titrate with standard sodium thiosulphate  
solution.  
A.3.2  Add the thiosulphate solution until the colour of the titrated solution becomes light yellow. Then add 1  
ml of starch in dicator and continue the titration until the disappearance of the blue colour.  
A.3.3  Carry out a blank determination without using the sample.  
A.4 Calculation  
The peroxide value, expressed in milliequivalent of oxygen per kilogram , shall be calculated as f ollows:  
 
Where  DUS 2392: 2021  
© UNBS  2021  – All rights reserved  5 
 V1 is the volume of standard sodium thiosulphate solution required with the sample;  
V2 is the volume of standard sodium thiosulphate solution required with the blank;  
N is the normality of standard sodium thiosulphate solution; and  
M is the  mass, in grams, of the sample taken for the test.  DUS 2392: 202 1 
6 © UNBS 2021  – All rights reserved  
 Bibliography  
[1] US EAS 958:2020, Baby oils -Specification  
[2] US EAS 959:2020 , Body oils -Specification  
 DUS 2392 : 2021  
© UNBS 2021 – All rights reserved  7 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda Nationa l Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification m ark 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 stan dard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Uganda 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 2392 : 2021    
 
ICS 71.100.70  
Price based on nn pages  
© UNBS 2021 – All rights reserved