DEAS 1152: 2023  
ICS 83.080.01  
 
© EAC 202 3                                                                                                                              First Edition 202 3 
 DRAFT EAST AFRICAN STANDARD  
Rubber teat (nipple) for baby feeding bottle — Specification  
EAST AFRICAN COMMUNITY  
 DEAS 1152: 2023  
ii © EAC 2023 – All rights reserved  
 Copyright notice  
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Violators may be prosecuted . DEAS 1152: 2023  
© EAC 202 3 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ .............................  v 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  1 
4.1 General requirements  ................................ ................................ ................................ ...........................  1 
4.2 Specific requirements  ................................ ................................ ................................ ...........................  2 
5 Packagi ng ................................ ................................ ................................ ................................ ...............  2 
6 Labelling  ................................ ................................ ................................ ................................ .................  2 
7 Sampling  ................................ ................................ ................................ ................................ ................  3 
Annex  A (normative)  Determinati on of acetone extractable matter from rubber teats  ..............................  4 
A.1 Outline of the method  ................................ ................................ ................................ ...........................  4 
A.2 Procedure  ................................ ................................ ................................ ................................ ...............  4 
A.3 Calculation  ................................ ................................ ................................ ................................ .............  4 
Annex  B (normative)  Determination of free sulphur from acetone extractable matter in rubber 
teats  ................................ ................................ ................................ ................................ ........................  5 
B.1 Outline of the method  ................................ ................................ ................................ ...........................  5 
B.2 Reagents  ................................ ................................ ................................ ................................ ................  5 
B.3 Procedure  ................................ ................................ ................................ ................................ ...............  5 
B.4 Calculation  ................................ ................................ ................................ ................................ .............  6 
Annex  C (normative)  Change in physical properties  ................................ ................................ .....................  7 
C.1 Outline of the method  ................................ ................................ ................................ ...........................  7 
C.2 Procedure  ................................ ................................ ................................ ................................ ...............  7 
C.3 Water extract  ................................ ................................ ................................ ................................ ..........  7 
Annex  D (normative)  Determination of pH value of water extract  ................................ ................................  8 
D.1 Outline of the method  ................................ ................................ ................................ ...........................  8 
D.2 Apparatus  ................................ ................................ ................................ ................................ ...............  8 
D.3 Procedure  ................................ ................................ ................................ ................................ ...............  8 
D.4 Report  ................................ ................................ ................................ ................................ .....................  8 
Annex  E (normative)  Deformation under tension test  ................................ ................................ ...................  9 
E.1 Apparatus  ................................ ................................ ................................ ................................ ...............  9 
E.2 Procedure  ................................ ................................ ................................ ................................ ...............  9 
E.3 Expression of results  ................................ ................................ ................................ ............................  9 
Annex  F (normative)  Determination of tear resistance  ................................ ................................ ...............  10 
F.1 Apparatus  ................................ ................................ ................................ ................................ .............  10 
F.2 Test method  ................................ ................................ ................................ ................................ .........  10 
Annex  G (normative)  Resistance to sudden temperature changes  ................................ ...........................  12 
Annex  H (normative)  Determination of N -nitrosamines and N -nitrosatable con tent ...............................  13 
H.1 Release -test liquid (saliva test solution)  ................................ ................................ ...........................  13 
H.2 Test conditions  ................................ ................................ ................................ ................................ .... 13 
H.3 Determining the release of N -nitrosamines and N -nitrosatable substances  ................................  13 
Annex  I (normative)  Bottle adhesion test  ................................ ................................ ................................ ..... 14 
I.1 Apparatus  ................................ ................................ ................................ ................................ .............  14 
I.2 Test method  ................................ ................................ ................................ ................................ .........  14 DEAS 1152: 2023  
iv © EAC 2023 – All rights reserved  
 Annex  J (normative)  Sampling of rubber teats for feeding bottles  ................................ ...........................  15 
J.1 General requirements of sampling  ................................ ................................ ................................ ... 15 
J.2 Scale of sampling  ................................ ................................ ................................ ...............................  15 
J.3 Numbe r of tests and criteria for conformity (workmanship and finish)  ................................ ........  16 
Bibliography  ................................ ................................ ................................ ................................ .....................  17 
 DEAS 1152: 2023  
© EAC 202 3 – All rights reserved  v 
 Foreword  
Development of the East African Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and services are exchanged 
within the Co mmunity will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the National 
Standards Bodies in Partner States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including government, academia, consumer gro ups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and incorporated before finalization of standards , in 
accordance with the Principles and procedures for develop ment of East African Standards.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible for this document is Technical Committee EASC/TC 072, Plastics and related 
products.  
Attention is drawn to the possibility that some of the elements of this document may be subject of patent 
rights. EAC shall not be held responsible for identifying any or all such patent rights.  
 DRAFT EAST AFRICAN STANDARD  DEAS 1152: 2023  
 
© EAC 202 3 – All rights reserved  1 
 Rubber teat (nipple) for baby feeding bottle — Specification  
1 Scope   
This Draft East African Standard  specifies requi rements, sampling and test methods for rubber teat (nipple) for 
baby feeding bottle  
2 Normative references   
There are no normative references in this document.  
3 Terms and definitions   
For the purposes of this document, the following terms and definitions apply.  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
3.1  
baby feeding bottle  
bottle fitted wi th a nipple/ teat for feeding babies  
3.2  
teat (nipple)  
rubber mouth -piece of a baby feeding bottle resembling the tip of a mammary gland  
3.3  
extractable matter  
organic and inorganic chemical species that can be released from the surface of the teat (nip ple) 
3.4  
axis 
the line between the centre and the longitudinal point of the rubber teat  
4 Requirements  
4.1 General requirements  
4.1.1  The rubber teat shall be made from food grade rubber together with necessary compounding and 
vulcanizing ingredients. The  rubber teat shall be free from grits, reclaimed rubber or vulcanized waste  
4.1.2  All ingredients used shall be free from harmful substances liable to extraction by contact with liquid 
foods or which may cause the development of undesirable odour, taste or  discolouration.   
2 © EAC 2023 – All rights reserved  
 4.1.3  Softeners, organic accelerators and antioxidants, if incorporated, shall not impart an undesirable 
odour or taste to the finished rubber teats. The following accelerators are recommended:  
a) dithiocarbamates;  and  
b) appropriate derivati ves of mercaptobenzothiazole.  
4.1.4  The rubber teats shall be transparent or translucent and shall be free from patches, blisters, porosity, 
sticky abrasions, stains, spots burrs/ flash, embedded foreign matter or any other defects when examined 
visually.  
4.1.5  The shape and size of the rubber teats shall be appropriate for use in feeding babies.  
4.2 Specific requirements  
Rubber teat for baby feeding bottle shall comply with the requirements given in Table 1 when tested in 
accordance with the  test methods s pecified therein shall conform to the specific requirements in Table 1 . 
Table 1 ─ Specific requirements for rubber teat for  baby feeding bottle  
S/N Characteristic  Requirement  Test method  
i)  Extractable matter, %, max.  3 Annex A  
ii)  Free sulphur, % w/w, max.  0.2 Annex B  
iii)  Change in physical properties  No sign of deterioration such as 
tackiness, hardness, crackiness 
and discolouration  Annex C  
iv)  Colour, odour and turbidity  No impacting colour, odour or 
turbidity  
v)  pH 7.0 ± 0.5  Annex D  
vi)  Deformation under tension , %, max . 20 Annex E  
vii)  Tear resistance  No crack or tear  Annex F  
viii)  Temperature  resistance  No crack or tear  Annex G  
ix)  N-nitrosamines, mg/kg, max.  0.01 Annex H  
x)  N-nitrosatable, mg/kg, max . 0.1 
xi)  Bottle adhesion  No crack or tear, no leakage  Annex I  
 
5 Pack aging  
The rubber teat shall be packaged in suitable containers that guarantee product integrity during transportation, 
storage and handling . 
6 Labelling  
Each single or bulk package or both shall be legibly and  indelibly labelled with the following:  
a) name an d physical address of manufacturer or trademark, if any ; 
b) name of product as, “Bottle teats (nipples)”;   
© EAC 202 3 – All rights reserved  3 
 c) type of rubber used;  
d) instruction for use, hygienic care, disposal and cautions/warnings;  
e) number o f rubber teats  in each package;  
f) batch number; and  
g) month and year of manufacture . 
7 Sampling  
For the purpose of ascertaining the conformity of the rubber teats to this specification, the scale of sampling 
shall be as prescribed in Annex J .  
4 © EAC 2023 – All rights reserved  
 Annex  A 
(normative)  
 
Determination of acetone extractable matter from rubber teats  
A.1 Outline of the method  
A known quantity of the sample is weighed and wrapped in a filter paper, folded, so that the particles cannot 
become detached and find their way into the extraction flask. The sample is then placed in the siphon cup of 
the extraction apparatus and extracted for a period considered adequate for the separation  involved by 
heating on a water bath. The extracted matter in the flask is freed from  the solvent and its contents are dried 
at a constant temperature, cooled and weig hed.  
A.2 Procedure  
A.2.1  Place a weighed specimen of approximately 2 g in a filter paper. If the speci men is in the form of a 
sheet, cut it with scissors into strips 3  mm to 5 mm in width. If the specimen may become tacky during 
extraction, take care that  adjacent portions are separated by paper.  
A.2.2  Fold the paper so that it will fit in the extraction cup and suspend the cup in a weighed extraction flask 
contai ning 50 ml to 75 ml of acetone. Prior to weighing of the flask, it shall hav e been dried for two hours at 70 
°C ± 5 °C and cooled in a desiccator to the temperature of the balance . 
A.2.3  Extract the specimen continuously for 16 h heating at such a rate that the time required to fill and 
empty t he siphon cup will be between 2.5 min and 3.5 min. Car efully note all characteristics of the extracts, 
both when hot and cold.  
A.2.4  Evaporate off the acetone over a steam bath, using a gentle current of filtered air to prevent b oiling. 
Remove the flask from the steam bath just prior to the disappearance of the last traces of solvent to prevent 
loss of extract.  
A.2.5  Continue the passage of air through the flask for 10 min to remove the remaining solvent and  dry the 
flask for two hours at 70 °C ± 5 °C in an air -bath. Cool in a desiccator to the tempera ture o f the balance and 
weigh.  
A.3 Calculation  
Acetone extract, expressed as percent, shall be calculated as follows:  
 
where  
a is the weight , in grams,  of extract ; 
b is the weight , in grams,  of specimen used .  
© EAC 202 3 – All rights reserved  5 
 Annex  B 
(normative)  
 
Determination of free sulphur from acetone extr actable matter in rubber 
teats   
B.1 Outline of the method  
Free sulphur in the acetone extract is determined by the acid digestion method. In this method, the sample is 
treated with an oxidis ing acid such as nitric and an auxiliary agent such as bromine, at an elevated 
temperature. By this oxidation, sulphur is converted to sulphate, in which form i t is estimated gravimetrically.  
B.2 Reagents  
B.2.1 Bromine , saturated bromine water  
B.2.2 Nitric acid with a specific gravity of 1.50  
B.2.3 Zinc nitric acid solution , add 200 g of zinc oxide to 1 L of nitric acid  with a specific gravity of 1.42  
B.2.4 Potassium chlorate crystals  
B.2.5 Picric acid , saturated solution  
B.2.6 Barium chloride solution , 100 g/L  
B.2.7 Hydrochloric acid  
B.3 Procedure  
B.3.1 Add to the flask containing the acetone extract, 10 ml of zinc -nitric acid solution and 2 ml to 3 ml of 
bromine and cover with a watch glass. Allow to stand near a steam plate for 30 min, then heat on the s team 
plate to a foamy syrup.  
B.3.2 Add 10 ml of nitric acid and heat on the hot plate with the cover removed until all br omine is expelled. 
Continue if o rganic matter or carbon remains at this point, add a few millilitres of nitric acid and a few crystals  
of potassium chlorate  and evapo rate at boiling. Repeat this operation until all carbon is removed and the 
solution is clear, colourless, or light yellow.  
B.3.3  At this point either of the following methods may be used : 
a) Method A , place the flask on an asb estos gauze and evaporate the mixture to dryness over a burner. 
Then bake the mixture at the highest temperature of the burner until all nitrates are decomposed and 
no more nitrogen oxide fumes can be detected. The flask and its contents shall carefully an nealed 
after this procedure by gradually decreasing the flame or by placing the flask on  a successively cooler 
source of heat ; and  
b) Method B , evaporate the mixture, cool, add 10 ml of hydrochloric acid, and evaporate to dryness, 
avoiding spattering. Repeat this procedure once, or more, if oxides of nitrogen are still evolved .   
6 © EAC 2023 – All rights reserved  
 B.3.4 Cool the flask, add 5 0 ml of hydrochloric acid (1: 6) and digest hot until solution is as complete as 
possible. Filter while hot. Wash the filter and dilute the filtrate and washi ngs using distilled water  to about  300 
ml.  
B.3.5 Add 10  ml of saturated pi cric acid solution, heat to 90 °C, and precipitate the sulphate by dropwise 
addition of barium chloride solution while stirring vigorously . Digest the precipitate overnig ht, prefera bly at 60 
°C to 80 °C, usi ng a watch glass to cover the beaker.  
B.3.6 Filter the barium sulphate and wash with distilled water until the filtrate is colourless. Dry, incinerate, 
and finally ignite  the precipitate at 650 °C to 900  °C to constant weight. Co ol in a desic cator and weigh.  
B.4 Calculation  
Sulphur c ontent , expressed as percent  by weight , shall be calculated as follows : 
 
where  
A is the weight , in grams, of barium sulphate;  
B is the weight , in grams,  of specimen used.   
© EAC 202 3 – All rights reserved  7 
 Annex  C 
(normative)  
 
Change in physical properties  
C.1 Outline of the method  
Rubber teats are autoclaved for a known time at constant temperature and the change in physical properties 
of rubber teats,  as examined visually, is reported.  
C.2 Procedure  
Take three  rubber  teats and  autoclave them in 250 ml of water for one hour at 120 °C ± 5 °C. Cool  the 
autoclave to room tempera ture and keep the water  extract for further test in C.3 . Keep the rubber teats in  an 
air-oven maintained at 120 °C ± 2 °C for one hour, and examine the rubber teats after  cooling to room 
temperature for any sign of deterioration such as tackiness, hardness, crackiness and discolouration.  
C.3 Water extract  
Examine the water  extract as obtained under C.2  for any colour,  odour and turbidity imparted to the water .  
8 © EAC 2023 – All rights reserved  
 Annex  D 
(normative)  
 
Determination of pH value of water extract  
D.1 Outline of the method  
The pH value of the water extract is determined electrometrically with t he help of the glass elect rode, by direct 
reading method.  
D.2 Apparatus  
D.2.1 Glass b eaker , of sufficient size to accommodate the sample used  
D.2.2 Metallic container , made of stainless steel or copper for boiling water  
D.2.3 pH meter, equipped with glass and calomel electrodes to directly read pH having an accuracy of 
±0.05 
D.2.4 Watch glass  
D.3 Procedure  
D.3.1 Boil the sample for 15 min in water and decant the extract into the container.  
D.3.2 Let the mixture cool to room temperature in an atmosphere fr ee from chemical fumes which might 
contaminate the samples.  
D.3.3 Decant off any supernatant liquid. Place the electrodes in the sludge and rotate the beaker gently in 
alternate direction until a constant pH value is obtained. Repeat the procedure on a se cond sample.  
D.3.4 To prevent contamination of the sample during boiling, a clean watch glass may be used over the 
beaker.  
D.3.5  The distilled water used in the test should be as pure as possible. The pH of the freshly boiled 
distilled water shall be 6.9  ± 7.1.  
NOTE  Standardize the p H meter with a reliable buffer in the pH range of the aqueous extract samples to be tested.  
D.4 Report  
The report shall include the following:  
a) proper identification of the sample; and  result obtained from the two ind ividual determinations and 
their average ;  
© EAC 202 3 – All rights reserved  9 
 Annex  E 
(normative)  
 
Deformation under tension test  
E.1 Apparatus  
E.1.1  Cutting tools  for preparing the sample  
E.1.2  Tensile testing machine and clamping accessories  
E.1.3  Measuring steel tape or meter rule  capable of measuring accurately to ±0.5 mm  
E.1.4  Timer  accurate to ±1 s  
E.2 Procedure  
E.2.1  Cut out the rim of the rubber teat and  cut it open to form a band.  
E.2.2  Mark two reference lines 25 mm apart in the centre of th e band.  
E.2.3  Connect the band to a tensile testing machine and stretch it up to 75 mm and hold for 10 min.  
E.2.4  Release the band and measure the distance between the reference lines.  
E.3 Expression of results  
The permanent deformation/  elongation under t ension, expressed as a percentage of original length, shall be 
calculated as follows:  
 
where  
l is the distance between the two reference lines on the band after stretching up to 75 mm for 10 min.   
10 © EAC 2023 – All rights reserved  
 Annex  F 
(normative)  
 
Determination o f tear resistance  
F.1 Apparatus  
F.1.1  Pressure testing machine  
F.1.2  Press bar , ported from nichrome high chrome steel, grade H13 (H13 high chrome tool steel) or an 
equivalent. It has a hardness of at least 50 Rockwell C, its sha pe and dimensions are shown in Figure F.1, 
and it can be used with a pressure testing machine.  
 
Figure 1 — Shape and size of the pressed bar  
F.1.3  Punching plate , made of plastic, has a hardness (70 ± 5) Shore D  
F.1.4  Tensile strength tester  
F.1.5  Equipment suitable for holding various parts of the rubber teat  
F.2 Test method  
F.2.1  Place the viewing part of the rubber tip on the punching plate.  
 
© EAC 202 3 – All rights reserved  11 
 F.2.2  Adjust the push rod connected to the pressure test apparatus so that the center of the blade is well, 
upright and perpendicular to the axis of the rubber teat and about 15 mm to 20 mm from the top of the tip, 
measured along the axis of the tip of the rubber teat (see Figure F.2). In case the cross section of the used 
part does not loo k circular, adjust the press bar to match the sharp flat part of the rubber teat head . 
 
Figure F.2 — Location of the puncture of the rubber teat head  
F.2.3  Press the push rod onto the rubber tip at a rapid rate of (10 ± 5) mm/mi n until a compression force of 
(200 ± 10) N is achieved. This pressure is maintained for a period of time of (1 ± 0.5) s.  
F.2.4  Inspect the puncture mark on the rubber teat head. If the rubber teat is pierced through both sides of 
the wall, continue the te st in the next item. Do this test without having to continue with the next test.  
F.2.5  Fix the tip and base of the rubber tip that was pierced through both sides of the wall by means of a 
fixing device.  
F.2.6  Attach the device attached to the tensile teste r so that the tension is aligned with the axis of the 
rubber nipple. Adjust the tip to align along the axis of the rubber teat with a clamping force of (5 ± 2) N, then 
pull it with a fast speed of (200 ± 10) mm/min until a tensile of (90 ± 5) N is maintain ed for a period of (10 ± 
0.5) s.  
F.2.7  Examine the damage that has been caused by the hustle and bustle  
 
12 © EAC 2023 – All rights reserved  
 Annex  G 
(normative)  
 
Resistance to sudden temperature changes  
G.1 The rubber teats are soaked in boile d distilled water for a period of time of (10 ± 1) min without making 
contact with the container.  
G.2 The rubber teat  is boiled and immediately immersed in distilled water at a temperature of (5 ± 2) °C for 
(10 ± 1) min.  
G.3 Check to determine the damage c aused to the rubber .  
© EAC 202 3 – All rights reserved  13 
 Annex  H 
(normative)  
 
Determination of N -nitrosamines and N -nitrosatable content  
H.1 Release -test liquid (saliva test solution)  
To obtain the release -test liquid, dissolve 4.2 g of sodiu m bicarbonate (NaHCO 3), 0.5 g of sodium chloride 
(NaCl), 0.2 g of potassium carbonate (K 2CO 3) and 30.0 mg of sodium nitrite (NaNO 2) in one litre of distilled 
water or water of equivalent quality. The solution shall have  a pH value of 9 0.  
H.2 Test conditio ns 
Samples of material obtained from an appropriate number of rubber teats are immersed in the test release 
liquid for 24 h at a temperature of (40 ± 2) °C.  
H.3 Determining the release of N -nitrosamines and N -nitrosatable substances  
H.3.1  The release of N -nitrosamines is determined in one aliquot of each solution obtained according to H.2. 
The N -nitrosamines are extracted from the aliquot with nitrosamine -free dichloromethane (DCM) and 
determined by gas chromatography.  
H.3.2  The release of N -nitrosatable s ubstances is determined in another aliquot of the solution obtained 
according to H.2. The nitrosatable substances are converted into nitrosamines by acidification of the aliquot 
with hydrochloric acid. Subsequently the nitrosamines are extracted from the s olution with DCM and 
determined by gas chromatography.   
14 © EAC 2023 – All rights reserved  
 Annex  I 
(normative)  
 
Bottle adhesion test  
I.1 Apparatus  
I.1.1 Equipment for holding the baby feeding bottle  so that the horizontal plane is at an angle  of 45° 
(see Figure I.1).  
I.1.2 Equipment suitable for  holding the rubber tip and can be connected to the tensile tester  
I.1.3 Tensile testing machine  
 
Figure I.1  — Bottle adhesion test  
I.2 Test method  
I.2.1 Assemble the rubber cap to the baby feeding bottle filled with a liquid to nominal capacity.  
I.2.2 Hold the baby feeding bottle so that the horizontal plane is at an angle of 45° (see Figure I.1).  
I.2.3 Using the fixing device secure the loose tip of the rubber teat (10 ± 2) mm from the tip of the rubber 
teat. 
I.2.4 Connect the clamping device to the tensile tester and gently pull the rubber teat in line at a rapid rate 
of (200 ± 10) mm/min until a tensile of (60 ± 5) N is obtained and hold for (10 ± 0.5) s.  
I.2.5 Examine the damage caused to the rubber teat and the leakage  from the baby feeding bottle.  
 
© EAC 202 3 – All rights reserved  15 
 Annex  J 
(normative)  
 
Sampling of rubber teats for feeding bottles  
J.1 General requirements of sampling  
J.1.1  Precautions shall be taken to protect the samples, the material being sampled and the containers for 
samples from adventitious contamination.  
J.1.2  The samples shall be placed in clean, dry and airtight glass or other suitable containers on which the 
material of the rubber  teats has no action.  
J.1.3  The sample containers shall be of such size that they are almost completely filled by the sample.  
J.1.4  Each sample container shall be sealed airtight and marked with full details of sampling, the date of 
sampling and the year  of manufacture of rubber teats.  
J.2 Scale of sampling  
J.2.1  All the rubber teats for feeding bottles of the same size and manufactured from the same raw 
materials under similar conditions of manufacture in one consignment shall constitute a lot.  
J.2.2  Samples shall be tested from each lot separately, for ascertaining conformity of a lot to the 
requirements of this standard.  
J.2.3  The number of rubber teats to be selected in the sample from a lot shall depend upon the size of the 
lot and shall be in accor dance with Table J.1.  
Table J.1 — Scale of sampling and acceptance number  
S/N Number of rubber 
teats in the lot  Number of rubber 
teats to be selected in 
the samples  Permissible number of 
defective rubber teats 
for workmanship and 
finish  Number of tests to  be 
carried out for each of 
the other 
requirements  
i)  ≤ 300 9 1 1 
ii)  301 - 1000  18 1 1 
iii)  1001 - 3500  27 2 2 
iv)  ≥ 3501  45 3 3 
 
J.2.4  Although it is not possible to lay down any fixed rule as to how the samples are to be selected from 
the packages, it is desirable that the rubber teats be drawn evenly from as ma ny packages as possible. 
However, it is recommended that at least 10 % of the packages should be selected and an equal number of 
rubber teats drawn at random from each package selected to give the required number of rubber teats in 
accordance with column 3  of Table J.1.    
16 © EAC 2023 – All rights reserved  
 J.3 Number of tests and criteria for conformity (workmanship and finish)  
J.3.1  All the rubber teats selected in the sample shall be inspected for workmanship and finish in 
accordance with 4.1. A rubber teat shall be considered to be defecti ve, if it fails to satisfy the requirements of 
workmanship and finish in any one or more respect.  
J.3.2  A lot shall be considered as having satisfied the requirements of workmanship and finish, if the 
number of defective rubber teats found as in J.3.1 doe s not exceed the applicable permissible number of 
defective rubber teats.  
J.3.3  For determining the conformity of the lot to the requirements of acetone extractable matter, free 
sulphur in acetone extract, change in physical properties, water extract (col our, odour, turbidity), pH of water 
extract, tension test, tear resistance, temperature, N -nitrosamines, N -nitrosatable and bottle adhesion, the 
number of tests to be carried on a lot per requirement, shall be in accordance with column 5 of Table J.1. For 
carrying out these tests, the rubber teats as selected under column 3 of Table J.1 and found satisfactory for 
workmanship and finish shall be used. In case additional number of rubber teats are required for these tests, 
they shall also be selected at rando m from the packages already used for drawing the samples.  
J.3.4  All the test results for the different characteristics shall satisfy  the requirements of the standard 
individually   
© EAC 202 3 – All rights reserved  17 
 Bibliography  
[1] IS 3565:  1966 , Specification for rubber teats  for feeding b ottles  
[2] TIS 969 -2562 : 2019, Rubber nipples for feeding bottles  
[3] Official Journal of the European Communities, No L 93/37, COMMISSION DIRECTIVE 93/11/EEC of  
15 March 1993 , concerning the release, of the N -nitrosamines and N -nitrosatable substances  from 
elastomer or rubber teats and soothers  
[4] US 2394:  2022, Rubber teat (nipple) for baby feeding bottle — Specification  
 WD/TC072/010/2022    
 
© EAC 202 3 – All rights  reserved