DRAFT UGANDA STANDARD  
  DUS 1709  
First Edition  
2017 -mm-dd 
 
 
 Reference number  
DUS 1709 : 2017  
© UNBS 2017   
  
Disinfectants /sanitizers  based on iodophors  — Specification  
 DUS 1709 :2017  
ii © UNBS 2017  – 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 
responsi ble for its correct application  
© UNBS 2017  
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 prio r 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 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  
 DUS 1709 :2017  
© UNBS 2017  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  2 
4.1 Type  ................................ ................................ ................................ ................................ ........................  2 
4.2 Raw materials  ................................ ................................ ................................ ................................ ........  2 
4.3 Bactericidal efficacy and suitability for purpose  ................................ ................................ ...............  2 
4.4 pH value  ................................ ................................ ................................ ................................ ..................  2 
4.5 Water -insoluble matter content  ................................ ................................ ................................ ...........  2 
4.6 Storage stability  ................................ ................................ ................................ ................................ ..... 3 
4.8 Added colouring matter  ................................ ................................ ................................ ........................  3 
5 Packaging and labelling ................................ ................................ ................................ ........................  3 
5.1 Packaging  ................................ ................................ ................................ ................................ ...............  3 
5.2 Labelling  ................................ ................................ ................................ ................................ .................  3 
Annex  A  (normative)   Sampling and compl iance with this standard  ................................ ..........................  5 
A.1 Sampling  ................................ ................................ ................................ ................................ ................  5 
A.1.1  General  ................................ ................................ ................................ ................................ ...................  5 
A.1.2  Sample for inspection  ................................ ................................ ................................ ...........................  5 
A.1.3  Sample for testing  ................................ ................................ ................................ ................................ . 5 
A.2 Compliance with this standard  ................................ ................................ ................................ ............  6 
Annex  B  (normative)   Determination of water -insoluble matter content  ................................ ....................  7 
B 1 Procedure  ................................ ................................ ................................ ................................ ...............  7 
B.2 Calculation  ................................ ................................ ................................ ................................ .............  7 
Annex  C  (normative)   Determination of storage stability  ................................ ................................ .............  8 
C.1 Reagents  ................................ ................................ ................................ ................................ ................  8 
C.2 Procedure  ................................ ................................ ................................ ................................ ...............  8 
C.3 Calculation  ................................ ................................ ................................ ................................ .............  8 
Annex  D  (normative)   Determination of added colouring matter  ................................ ................................  9 
D.1 Reagent  ................................ ................................ ................................ ................................ ..................  9 
D.2 Procedure  ................................ ................................ ................................ ................................ ...............  9 
D.3 Interpretation of results  ................................ ................................ ................................ ........................  9 
Annex  E  (informative)   Quality verification of disinfectants/sanitizers for use on food contact 
surfaces  ................................ ................................ ................................ ................................ ................  10 
E.1 General  ................................ ................................ ................................ ................................ .................  10 
E.2 Quality system requirements  ................................ ................................ ................................ .............  10 
E.3 Assessment of quality system  ................................ ................................ ................................ ...........  11 
Bibliography  ................................ ................................ ................................ ................................ ......................  12 DUS 1709 :2017  
iv © UNBS 2017  – 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 , as amended .  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  Agreement  of the World Trade Orga nisation (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 stakeholders 
including government, academia, co nsumer 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 reviews the comments before recommending the dra ft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC 5, [Chemicals and 
environment] . 
 DRAFT UGANDA STANDARD  DUS 1709 : 2017  
 
© UNBS 2017 – All rights reserved  1 
 Disinfectants /sanitizers  based on iodophors  — Spec ification  
1 Scope  
This draft Uganda standard specifies the requirements  and methods  of sampling and test for two types of 
disinfectants /sanitizers  that contain iodophor(s) and compatible surface agents that are miscible with water 
and intended for use on i nanimate su rfaces. This draft standard is  applicable to disinfectants /sanitizers  
containing iodophor(s) as the sole active ingredient(s), and those  containing two or more active ingredients, 
where iodophors are  present . An example of an iodophor is povidon e-iodine.  
2 Normative references  
The following referenced documents 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 
referen ces, the latest edition of the referenced document (including any amendments) applies.  
DUS 1692, Determination of bactericidal efficacy of disinfectants/sanitizers  
US EAS 384 , Disinfectants — Glossary of terms  
US ISO 10523, Water quality — Determination of  pH 
3 Terms and definitions  
For the purposes of this document, the terms and definitions given in US EAS 384 and the following apply.  
3.1  
active ingredient  
any chemical or biological component that is included in the formula tion of a disinfectant /sanitize r product in 
sufficient concentration to achieve the intended anti -microbial  purpose of the specific product  
3.2  
acceptable  
acceptable to the authority administering this standard, or to the parties concluding the purchase contract, as 
relevant  
3.3  
batch  
collection of packages containing a disinfectant /sanitizer  of a single type and composition and of a single 
manufactured blend, or of a single delivery  
3.4  
defective  
a sample of disinfectant /sanitizer  that fails in one or more respects to comply with the relevant requirements of 
this standard   
2 © UNBS 2017  – All rights reserved  
 3.5  
inanimate surface  
any surface other than live human or live animal tissue (for example skin)  
3.6  
iodophor  
a combination of iodine and solubilizing agent (or a "carrier") that contains (and, when diluted with wa ter, 
slowly liberates) free iodine  
3.7  
lot 
that quantity of disinfectant /sanitizer  in sealed containers of the same size and bearing the same batch 
identification, from one manufacturer, submitted at any one time for inspection and testing  
ISO and IEC mai ntain terminological databases for use in standardizat ion at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
4 Requirements  
4.1 Type  
The disinfectant /sanitizer  shall be of one of the following types, as required : 
a) type 1:  without added acid; or  
b) type 2:  containing an added acid of an acceptable type . 
4.2 Raw materials  
Raw materials used in the formulation of the disinfectant/sanitizer shall be such as to be suitable for the 
intended use. Products shall not contain ingredients that are recognized as being potentially hazardous or 
toxic when the products are used in accordance with the manufacturer's recommendations, nor shall they 
form toxic or poten tially toxic reaction products.  
4.3 Bactericidal efficacy and suitab ility for purpose  
When the bactericidal efficacy of a disinfectant/sanitizer is tested in accord ance with DUS 1692 , at the 
prescrib ed concentration, the disinfectant/sanitizer  shall pass the test.  
NOTE  It is recommended that the user assess es the  efficacy  of the disinfectant/sanitizer  and suitability for purpose 
for the specific target surfaces  under local conditions.  
4.4 pH value  
When the disinfectant /sanitizer  is tested in accordance with US ISO 10523, at the manufacturer’s prescribed 
concentration, the p H value shall comply with the appropriate of the following:  
a) type 1:  4.0 – 7.0 ; and  
b) type 2:  2.0 – 4.0. 
4.5 Water -insoluble matter content  
When the disinfectant /sanitizer  is tested in accordance with Annex B , at the presc ribed concentration , the 
water -insoluble matter content shall not exceed 5 g/L.  DUS 1709 : 2017  
© UNBS 2017  – All rights reserved  3 
 4.6 Storage stability  
When the disinfectant /sanitizer  is tested in accordance with Annex C,  
a) no visible separation shall occur during either the 24 h cooling period or the 24 h warming period; and  
b) the highest of t he four values of the available iodine content (s ee C .3) shall not differ from  the lowest  
by more than 10 %. 
4.7 Odour, taste and colour  
4.7.1  Disinfectants/sanitizers shall not leave an objectionable odour on surfaces.  
4.7.2  A disinfectant/sanitizer intend ed for use on food contact surfaces (including drinking water contact 
surfaces) shall not contain perfumes. It shall not impart any colour, taste, odour or flavour to food products or 
drinking water, when used in accordance with the manufacturer's recommen dations.  
4.8 Added colouring matter  
The disinfectant /sanitizer  shall not contain any added colouring matter and shall pass the test given in Annex 
D. 
5 Packaging and labelling  
5.1 Packaging  
5.1.1 The container (including the closure) in which the disinfect ant/sanitizer is packaged shall not interact 
chemically or physically with the disinfectant/sanitizer and shall be strong enough to protect the 
disinfectant/sanitizer adequately during normal handling, transportation and storage.  
5.1.2 The closure shall no t be made of cork or of any material that contains cork.  
5.1.3 Only packs of the same size and bearing the same batch identification shall be packaged together in 
a bulk pack.  
5.2 Labelling  
The following information shall appear prominently , legibly and du rably on each  disinfectant/sanitizer  container 
or on a label secu rely attached to each  container:  
a) the manufacturer's name or trademark, or both;  
b) a statement that the product is a disinfectant /sanitizer  based on iodophor(s) ; 
c) a statement of the nominal volum e or mass o f the contents in metric units;  
d) an indication of the intended use areas for which the product is claimed to be suitable;  
NOTE  Intended use areas may include one or more of the following: general residential settings, 
industrial/institutional set tings (such as commercial settings, schools, and offices), hospitals (for non -critical medical 
devices), food processing/food handling areas and equipment, barns/animal housing settings and any other specific area.  
e) general instructions for use of the produ ct. T he instructions shall include the recommended 
concentration , dilution level  and the minimum e xposure period for each purpose ; 
f) hazard and toxicity warnings, where relevant;   
4 © UNBS 2017  – All rights reserved  
 g) a statement about the safety precautions to be taken when using the product  and the first aid steps to 
be taken in case o f direct ingestion  or skin contact ; 
h) when so authorized by the relevant authority, a certification mark that indicates compliance with this 
and with other relevant standards;  
i) the batch identification number; or the production date of the batch or both;  
j) the expiry date of the product, where relevant;  
k) adequate draining, rinsing and/or drying requirements from surfaces after use; and  
l) appropriate instructions for the storage of the product, including a warning to store a way from 
children;  
m) a warning to avoid contact with known incompatible substances, items and foodstuffs . 
NOTE 1  The product name should not be misleading to the consumer.  
NOTE 2  The manufacturer should substantiate any virucidal claim made about the product . DUS 1709 : 2017  
© UNBS 2017  – All rights reserved  5 
 Annex  A  
(normative)  
 
Sampling and compliance with this standard  
A.1 Sampling  
A.1.1  General  
The following sampling procedure shall be applied to determine whether a lot, submitted for inspection and 
testing, complies with the relevant requirements of th is standard. The sample so drawn shall be deemed to 
represent the lot.  
A.1.2  Sample for inspection  
From the lot, draw at random the relevant number of containers in accordance with table A.1.  
Table A.1 — Samples for inspection  
Lot size, containers  Sample s ize, containers  
5 — 20 
21 — 50 
51 – 90 
91 – 150 
151 – 280 
281 – 500 
501 – 1200  
1201 – 3200  
3201 - 10000  2 
3 
5 
8 
13 
20 
32 
50 
80 
 
A.1.3  Sample for testing  
A.1.3.1  After inspection of the containers drawn in accordance with A.1.2,  
a) take, at random, half the number of containers and use them for the storage stability test;  
b) take the remaining number of containers and from each of these containers take the smallest of the 
following:  
1) all the contents of the container, or  
2) 0.25 L in the case of liquids, or  
3) 0.25 kg in the case of solids.  
A.1.3.2  Combine these samples and mix them thoroughly to make up a composite sample for testing for 
compliance with the requirements of this standard.   
6 © UNBS 2017  – All rights reserved  
 A.2 Compliance with this standard  
Deem the lot to comply with the relevant require ments of this standard if:  
a) on inspection of the containers and on testing of the samples taken in accordance with A.1.2 and 
A.1.3, no defective is found;  
b) the manufacturer satisfies the certification body as to the safety of all materials used in the 
manufa cture of the product, and of the safety of the final product when used in accordance with the 
manufacturer's recommendations.  DUS 1709 : 2017  
© UNBS 2017  – All rights reserved  7 
 Annex  B  
(normative )  
 
Determination of water -insoluble matter content  
B 1 Procedure  
B.1.1  Pipette 5.0 mL of the undiluted disinfe ctant /sanitizer  into a beaker and add 250 mL of standard hard 
water . 
B.1.2  Heat in a steam bath with frequent stirring until the sample is completely dispersed.  
B.1.3 Filter the solution immediately, under suction, through a tarred  1.6 μm glass fibre filter and ensure 
that the insoluble matter is quantitatively transferred to the filter.  
B.1.4 Wash the beaker and the residue five times with 20 mL vol umes of hot standard hard water. Wash 
the filter with distilled water (to remove sal ts from the hard water).  
B.1.5 Allow the solution to drain completely and dry the residue at 105 °C ± 2 °C until constant mass is 
attained. Cool in a desiccator and weigh.  
B.2 Calculation  
Calculate the content of water -insoluble matter in the test solution , expressed in grams per litre, using the 
formula:  
Vm
 
where  
m is the mass of the residue after it has been dried, in grams; and  
V is the volume of the test solution, in litres.   
8 © UNBS 2017  – All rights reserved  
 Annex  C  
(normative )  
 
Determination of s torage stability  
C.1 Reagents  
C.1.1  0.02 N sodium thiosulfate (Na 2S2O3) solution, accurately standardized  
C.1.2  Starch solution, 10 g/L  
C.2 Procedure  
C.2.1  Transfer 200 mL of the sample to a 250 mL stoppered measuring cylinder. Cool to 10 °C ± 1 °C. 
Maintain at this temper ature for 24 h and then examine the test sample visually for signs of separation.  
C.2.2  If visible separation has not occurred, allow the test sample to return to ambient temperature and 
then take from it two test specimens, one from near the surface and o ne from near the bottom of the contents 
of the cylinder.  
C.2.3  Determine the available iodine content of each of these test specimens as follows:  
Pipette accurately 1 mL of the test specimen into a 250 mL Erlenmeyer flask, add 100 mL of distilled or 
demine ralized water and titrate with the 0. 02 N sodium thiosulfate  solution until a straw coloured titration 
mixture has been reached. Add a small amount of the starch indica tor and carry on with the titration until the 
end point at a starch indicator colour cha nge (from blue to colourless).  
NOTE  As some iodophors release iodine very slowly as the end point is neared, a reasonable time should be allowed 
before the titr ation is regarded as completed.  
C.2.4  Repeat the test with  another 200 mL test sample. But  from the stage described in C.2.1 above, w arm 
and maintain the test sample at a temperature of 40 °C ± 1 °C for 24 h instead of cooling it.  
C.3 Calculation  
Calculate, as follows, the available iodine content (as a percentage) of each of the four test specimens:  
%9.126NA
 
where 
A is the volume of the Na 2S2O3 solution used in the titration, in millilitres; and  
N is the normality of the Na 2S2O3 solution.  DUS 1709 : 2017  
© UNBS 2017  – All rights reserved  9 
 Annex  D  
(normative )  
 
Determination of a dded colouring matter  
D.1 Reagent  
Sodium thiosulphate, 50  g/L aqueous solution.  
D.2 Procedure  
Using a pipette, transfer 5 mL of the test sample to a clean test tube. Using a separate pipette, add 5 mL of 
the sodium thiosulphate solution and mix well.  
D.3 Interpretation of results  
If the colour of the mixture in the tube is no darker than pale straw 30 s after mixing, deem the  
disinfectant /sanitizer  to comply with 4.8 .  
10 © UNBS 2017  – All rights reserved  
 Annex  E  
(informative)  
 
Quality verification of disinfectants/sanitizers for use on food contact  
surfaces  
E.1 General  
When a purchaser requires ongoing verification of the quality of disinfectants/sanitizers for use on food 
contact surfaces, it is suggested that, instead of concentrating solely on evaluation of the final product, 
attention should als o be directed to the manufacturer's quality system. In this connection it should be noted 
that US ISO 9001 covers the provisions of an integrated quality system.  
E.2 Quality system requirements  
E.2.1 When assessed in accordance with E .3, the quality system  of a manufacturer of 
disinfect ants/sanitizers  for use on food contact surfaces  shall com ply with the requirements of E.2.2 to E.2.12. 
NOTE  Some or all of these requirements might be relaxed by the authority administering this standard if an 
appropriate so urce verification and inspection is being used by the manufacturer.  
E.2.2 Responsibility for the quality system shall be delegated to an officer who has sufficient authority, 
and is sufficiently qualified, to ensure compliance with the relevant requirement s of this standard.  
E.2.3 The responsibilities of all persons who have direct or indirect responsibility for quality shall be so 
defined and documented as to ensure that there is no overlap of functions or responsibilities.  
E.2.4 Quality system documentati on, and the amendment and revision of such documentation (including 
formulations, test methods and product standards), shall be written and authorized only by duly designated 
officers who have written authority to perform these functions.  
E.2.5 A documente d quality system shall exist and be implemented to ensure that only 
disinfect ants/sanitizers  that comply with the relevant requirements of this standard are delivered for use on 
food contact surfaces . Such documentation shall include, but not be limited to : 
a) procedures for the manufacture of the respective products,  
b) standards for all the raw materials used,  
c) standards for the finished products,  
d) standards for the testing of raw materials, packaging, work in progress and finished products,  
e) standards for packagi ng, labelling and storage of the finished products, and  
f) systems to ensure that personnel involved in activities that affect the manufacture and quality of the 
disinfectants/sanitizers have available only current and suitably authorized documented procedure s 
and standards, and that such documentation can be recalled and updated when necessary.  DUS 1709 : 2017  
© UNBS 2017  – All rights reserved  11 
 E.2.6 Systems shall exist and be implemented to ensure that only raw materials and packaging that 
comply with the relevant requirements of this standard are used in th e manufacture of disinfecta nts/sanitizers 
meant for food contact surfaces.  
E.2.7 The manufacturer shall implement a system of product identification to ensure that a product in its 
original packaging can be traced back to the relevant records of manufactur e and sources of raw materials.  
E.2.8 Products shall be manufactured in appropriate premises, using appropriate equipment and in 
accordance with appropriate documented manufact uring procedures (see E .2.4), by appropriately trained 
employees. Process contro l procedures shall be such as to ensure a consistent quality of the end product.  
E.2.9 The formul ations of the disinfectants/sanitizers  shall be submitted for approval to a certification 
body, together with sufficient safety data that cover both raw materi als and the finished product, to satisfy the 
certification body with respect to the safety of the product when used in accordance with the manufacturer’s 
recommendations. Material safety data sheets shall form an integral part of such safety data. Formulat ions, 
once approved, shall not be altered without the approval of the certification body. The certification body shall 
impose such reappraisal requirements as it considers necessary to ensure the continued safety of the 
product.  
E.2.10  Testing of raw mater ials, packaging, work in progress and finished product shall be carried out by 
appropriately qualified and trained personnel who have access to suitable equipment and facilities and in 
accordance with documented procedures. Test records shall be maintained  and appropriate samples (see 
annex A) shall be retained for a period that is sufficient to comply with the requirements of the customer and 
the certification body or the regulatory or inspection authority.  
NOTE  A sample retention time of at least six mont hs and a record retention time of at least two years are 
recommended.  
E.2.11  Test equipment shall be calib rated periodically to ensure  reliability and accuracy. Records of 
calibration shall be kept. The period between successive calibrations shall not exce ed one year.  
E.2.12  Systems shall exist and be implemented to ensure that only disinfect ants/sanitizers  that comply 
with the relevant quality standards are dispatched to the customer.  
E.3 Assessment of quality system  
NOTE  See note to E .2.1 
The quality syst em shall be assessed by auditors who are trained, qualified and experienced in the evaluation 
of quality systems in accordance with recognized quality system standards such as US ISO 9001. Audits shall 
be carried out in accordance with the generally accept ed criteria for assessing compliance with such 
standards.   
12 © UNBS 2017  – All rights reserved  
 Bibliography  
[1] SANS 1674, Disinfectants based on iodophors  
[2] SANS 1853, Disinfectants and detergent -disinfectants for use in the food industry  
[3] US ISO 9001 , Quality management systems — Requi rements  
 DUS 1709 : 2017  
© UNBS 2017 – All rights reserved  13 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National 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 mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The 
presence of this mark on a p roduct or in relation to a product is an assurance that the goods comply with the 
requirements of that standard 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 1709 : 2017    
 
ICS 71.100.35  
Price based on nn pages  
© UNBS 2017 – All rights reserved