FINAL DRAFT UGANDA 
STANDARD  
  FDUS EAS 793-1 
First  Edition  
2013-mm-dd 
 
 Reference number  
FDUS EAS 793-1: 2013 
© UNBS 201 3 
  
Toilet cleansers ― Specification ― Part 1 : Acidic liquid toilet 
cleansers  
 FDUS EAS 793-1: 2013 
ii                © UNBS  2013 - 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 fo r its correct application  
© UNBS 20 13 
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 writ ten 
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 41 505 995  
Fax: 256 41 286 123  
E-mail: unbs@infocom.co.ug  
Web: www.unbs.go.ug  
 FDUS EAS 793-1: 2013 
© UNBS  2013 - All rights reserved                 iii National foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Tourism, Trade and 
Industry established under Cap 327, of the Laws of Uganda. UNBS is mandated  to co -ordinate the elaboration 
of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT/SPS Agreement s 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 representatives of 
consume rs, traders, academicians, manufacturers, government and other stakeholders.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before reco mmending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
This Final Draft Uganda Standard, FDUS EAS 793-1: 2013, Toilet cleansers ― Specification ― Part 1 : Acidic 
liquid toilet cleansers , is identical with  and has been rep roduced from an East African  Standard , EAS 793-1: 
2013 , Toilet cleansers ― Specification ― Part 1 : Acidic liquid toilet cleansers , and is being proposed for 
adoption as a Uganda Standard.  
Wherever the words, “ East African  Standard" appear, they should be replaced by "Uganda St andard."  
 
   FDEAS 793-1: 2013 
ICS 71.100.40  
© EAC 2013                                                                                                                              First Edition 201 3  
 
FINAL DRAFT EAST AFRICAN STANDARD 
Toilet cleansers ― Specification ― Part 1: Acidic liquid toilet cleansers  
EAST AFRICAN COMMUNITY FDEAS 793-1: 2013 
ii © EAC 2013 – All rights reserved 
 Copyright notice 
This EAC document is copyright-protected by EAC. Wh ile the reproduction of this document by 
participants in the EAC standards development proce ss is permitted without prior permission from EAC, 
neither this document nor any extract from it may b e reproduced, stored or transmitted in any form for  
any other purpose without prior written permission from EAC. 
Requests for permission to reproduce this document for the purpose of selling it should be addressed 
as shown below or to EAC’s member body in the count ry of the requester: 
© East African Community 2013 — All rights reserved  
East African Community  
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Tanzania 
Tel: 255 27 2504253/8 
Fax: 255 27 2504481/2504255 
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       Web: www.eac-quality.net 
Reproduction for sales purposes may be subject to r oyalty payments or a licensing agreement. 
Violators may be persecuted 
 FDEAS 793-1: 2013 
© EAC 2013 – All rights reserved  iii
 Foreword 
Development of the East African Standards has been necessitated by the need for harmonizing requiremen ts 
governing quality of products and services in the E ast African Community. It is envisaged that through  
harmonized standardization, trade barriers that are  encountered when goods and services are exchanged 
within the Community will be removed.  
In order to achieve this objective, the Community e stablished an East African Standards Committee mand ated 
to develop and issue East African Standards.   
The Committee is composed of representatives of the  National Standards Bodies in Partner States, toget her 
with the representatives from the private sectors a nd consumer organizations. Draft East African Stand ards 
are circulated to stakeholders through the National  Standards Bodies in the Partner States. The commen ts 
received are discussed and incorporated before fina lization of standards, in accordance with the proce dures 
of the Community. 
East African Standards are subject to review, to ke ep pace with technological advances. Users of the E ast 
African Standards are therefore expected to ensure that they always have the latest versions of the st andards 
they are implementing .  
FDEAS 793 was prepared by Technical Committee EAS/T C 074, Surface active agents . 
 FINAL DRAFT EAST AFRICAN STANDARD FDEAS 793-1: 2013
 
© EAC 2013 – All rights reserved 1 
 Toilet cleansers ― Specification ― Part 1: Acidic liquid toilet cleansers 
1 Scope 
This Final Draft East African Standard specifies re quirements and methods of test for acidic liquid to ilet 
cleansers. This standard applies to a liquid acid, heavy- duty compound suitable for cleaning toilet b owls and 
urinals. 
2 Terms and definitions 
For the purposes of this Final Draft East African S tandard the terms and definitions given in ISO 862 and the 
following apply. 
toilet cleanser 
product used for cleaning of toilet bowls and urina ls 
3 Requirements 
3.1 General requirements 
3.1.1  The product shall be a homogeneous aqueous liquid,  stable and with a distinct colour.  
3.1.2 The product shall be miscible in water in all propo rtions. 
3.1.3 The product shall be stable, and not deteriorate in  storage when kept in its original unopened 
container at ambient temperature for a period of on e year from the date of manufacture. 
3.1.4 The product shall not affect toilet bowl surfaces w hen used as directed by the manufacturer. 
3.1.5  The product shall not be used for any other purpos e and with any other cleaning product. 
3.2 Specific quality requirements 
3.2.1  The product shall comply with the specific quality  requirements prescribed in Table 1. 
Table 1 ― Specific quality requirements for acid toilet clea nser  
S/ No Characteristic Requirement Test method  
Min. Max. 
(i) Total acidity, %, m/m 7 12 Annex A 
(ii) Total surfactant, %, m/m 0.4 5 Annex B 
 
3.2.2  The product shall contain an effective rust inhibi tor when tested in accordance with Annex C.  
2 © EAC 2013 – All rights reserved 
 4 Packaging and marking 
4.1 Packaging 
4.1.1 The product shall be packed in suitable containers that are securely closed, impervious to the product  
or shall not be corroded by the product, and shall be sufficiently strong to prevent contamination of the product 
arising from the ordinary risks of transportation, handling and storage. 
4.1.2 The lid or cap on the container shall be such that the product is easily and safely dispensed from the  
container. 
4.2 Marking 
4.2.1 All information marked on the containers shall be m arked in a manner that is conspicuous, legible and 
indelible. 
4.2.2 Each container shall be marked with the following i nformation: 
a) name of the product as “acidic toilet cleanser” 
b) manufacturer’s name and physical address  
 NOTE The name, physical address of the distributor /supplier and trade mark may be added as required 
c) batch or code number; 
d) net contents; 
e) instruction of use (in either English, Kiswahili  or French or in combination as agreed between the 
manufacturer and supplier); 
f) date of manufacture and expiry date; and 
g) type of cleanser 'Acidic'; 
h) country of origin (manufacturer’s name, physical  address, and trade mark (if any) and name and 
physical address of the distributor/supplier if any ); 
i) precautionary notice marked in either English or  Kiswahili languages with the following information : 
i) the word 'CAUTION' shall be in a colour that con trasts with the surrounding for easy visibility and  
shall be followed with the statement, ‘READ LABEL B EFORE  USE'; 
ii) the following shall be marked immediately under  i): 
• 'Keep Out of Reach of Children'; 
• contains acid, the hazards involved and the necess ary storage precautions to be used;  
• that, in case of floor spills, baking soda ash sha ll be sprinkled over the product and the 
affected area shall be rinsed with water; 
• the product shall be used for the cleaning of toil et bowls and urinals only; 
• the  product shall not be used with any other clea ning product; 
• the product shall be marked with the following cau tionary words and symbols:  
© EAC 2013 – All rights reserved  3
 /head2right ‘CORROSIVE ACID’ (‘INAWEZA KUCHOMA/ ACIDE CORROSIF ’); followed by the 
symbol, 
 
/head2right ‘POISON/DANGER’ (‘SUMU/HATARI); followed by a skul l and bones, 
 
 
  
4 © EAC 2013 – All rights reserved 
 Annex A 
(normative) 
 
Determination of acidity 
Accurately weigh 10 g of sample in a 250-mL Erlenme yer flask and add 25 mL of distilled water. Add 
approximately 15 mL of 5 % aqueous calcium acetate solution and warm contents to 50 °C. Cool and filte r into 
beaker.  
Carefully rinse the Erlenmeyer flask precipitate wi th 3 to 4 aliquots of distilled water collecting al l rinsing with 
the filtrate. Titrate the filtrate with standard 1 mol/L NaOH solution.   
Calculate as follows: 
percent acidity = 
sample of mass xNaOH of mL x(mol/L) NaOH of ion concentrat C 
where 
C = 3.647 for HCI or 
C = 3.132 for H 3PO 4 
  
© EAC 2013 – All rights reserved  5
 Annex B 
(normative) 
 
Determination of non-ionic, anionic and cationic su rfactant content 
B.1 The molar mass and chemical name of all surfactants  used shall be supplied by the manufacturer on 
request by respective partner states bureaux of sta ndards, when use of High Pressure Liquid 
Chromatography (HPLC) equipment is employed in the determination of surfactant content in the product.  
B.2 Accurately weigh about 100 g of the product in a 25 0-mL Erlenmeyer flask and neutralize it with causti c 
soda solution to a pH of 8.8 to 7.0. 
B.3 Evaporate the resulting solution to dryness at 105 °C. Cool to room temperature and wash the resulting  
solids with five 20 mL aliquots of chloroform, filt ering and collecting each in one tared 300-mL beake r. 
Evaporate the chloroform and determine the weight o f organic solids, ( W1) g. 
( )
product of mass solids of mass solids Organic 1 = W  
NOTE Myer’s reagent may be used to confirm nonionic  surfactant.  Dissolve 100 mg to 150 mg of isolated  
surfactants in 5 mL of distilled water.  Add two dr ops of Myer’s reagent.  A yellow precipitate will f orm if non-ionic 
surfactant is present.  
B.4 Dissolve the organic solids in 50 mL of ethanol and  pass resulting solution through a 22 mm x 200 mm 
x 250 mm chromatographic column of freshly regenera ted cationic exchange resin (150 mm to 175 mm 
mesh). Wash the beaker with four 50 mL aliquots of ethanol collecting them in one tared beaker. (Catio nic 
surfactant, if present, will be retained, the eluat e will contain nonionic and anionic surfactants, if  present). 
Evaporate the alcohol eluate in an oven. Weigh accu rately, ( W2). 
cationic surfactant, g = W1 – W2 
B.5 Dissolve organic solids ( W2), g obtained in B.4  in 50 mL of ethanol and pass the resulting solution  
through a chromatographic column specified in B.4 b ut having freshly regenerated anionic exchange resi n 
(150 mm to 175 mm mesh). Wash the beaker with four 50 mL aliquots of alcohol collecting them in one ta red 
beaker.  (Anionic surfactant, if present, will be r etained, the eluate will contain only nonionic surf actant).  
Weigh accurately, W3, g. 
B.6 By difference, 
anionic surfactant content, g = ( W2 – W3) 
surfactant content, percent m/m = ()100 321×+−
mWWW or  
= 
m2Wx 100 %(anionic cleanser)  
6 © EAC 2013 – All rights reserved 
 Annex C 
(normative) 
 
Method for assessing corrosion potential 
C.1 Apparatus 
C.1.1 Squat and tall 1-L Pyrex glass beakers 
C.1.2 Oven , capable of maintaining 105 °C ± 2 °C 
C.1.3 Test panel,  made of stainless steel, of approximate dimensions  125 mm x 63 mm x 1.5 mm. The 
panels shall have a cold-rolled finish on both face s. They shall be undamaged and unmarked, flat and w ith 
their edges free from burrs. 
C.1.4 Stainless steel tongs,  for handling the panels 
C.1.5 Panel bolders , made of inert material such as polypropylene for use during pre-cleaning and drying 
operations 
C.1.6 Rubber bands , of rectangular cross-section, measuring when lyin g flat and unstretched, 
approximately 80 mm x 6 mm 
C.1.7 Magnesium carbonate (technical),  for use as an abrasive in cleaning panels 
C.1.8 Distilled water 
C.1.9 Watch glass, l arge enough to cover the tall 1-L beakers in C1.1 
C.2 Pre-cleaning of test panels and rubber bands 
C.2.1 Panels 
C.2.1.1 Swab the test panels, two for each test, with cotto n wool using a warm 1 % v/v solution of a 
general purpose detergent. 
C.2.1.2 Scour the panels with cotton wool using water as a lubricant and the magnesium carbonate as an 
abrasive.  
NOTE  Scouring also removes any films produced by reactio n between the detergent and the abrasive, for examp le, 
magnesium silicate. 
C.2.1.3 Without delay, thoroughly rinse the panels under ho t tap water, ensuring that all of the 
magnesium carbonate is removed. 
C.2.1.4 Then, rinse the panels in boiling, distilled water immersing each panel in turn in water contained 
in three 1-L beakers. 
C.2.1.5 Dry in an oven at 105 °C ± 2 °C. 
C.2.1.6 Allow to cool in a dry, dust-free position.   
© EAC 2013 – All rights reserved  7
 C.2.2 Rubber bands 
C.2.2.1 Place the rubber bands in a hard-boiling 1 % v/v so lution of a general cleaning detergent for 10 
min. 
C.2.2.2 Rinse under hot tap water. 
C.2.2.3 Then rinse in distilled water and allow to dry. 
C.3 Procedure 
C.3.1 The procedure shall be carried out in duplicate in accordance with C.3.2 – C.3.9. 
C.3.2 In a tall 1-L beaker, make up 950 mL of the use dil ution of the product under test. Mark the level of the 
solution on the side of the beaker. 
C.3.3 Place two rubber bands around each test panel in th e direction of the long axis of the panel, ensuring  
that the bands are flat against both sides of the p anel and that the panel is not touched by the finge rs. 
C.3.4 Five minutes after placement of the bands, immerse the panels on their ends as upright as possible in 
the test solution, so that there is at least 10 mm of solution above the panels. Note the time. Place the watch 
glasses on the beaker. 
C.3.5 Leave the panels in the test solution for 72 h.  Ea ch morning and evening, top up the solution to the 
mark with distilled water. 
C.3.6 At the end of the 72 h remove the panels from the t est solution, remove the bands and rinse the 
panels under hot, running water. 
C.3.7 Then rinse three times as prescribed in C.2.1.4 . 
C.3.8 Finally, dry the panels in the oven at 105 °C ± 2 ° C.  
C.3.9 Examine the panels for: 
a. evidence of corrosion, and 
b. discolouration. 
NOTE Pitting is most likely to occur where the rubb er band contacts the edges of the panel. 
C.4 Interpretation of results 
If the duplicate panels from the test detergents sh ow the same characteristics, record the results. If  the 
duplicates differ, repeat the test using fresh pane ls. 
C.5 Report 
The product shall be deemed to contain an effective  rust inhibitor if no visible corrosion or discolou ration of the 
panels has occurred. 
 
 FDEAS 793-1: 2013 
 
© EAC 2013  – All rights reserved