CDC 3(10) DTZS  
ICS: 71.100.70  
 
DRAFT TANZANIA STANDARD  
 
 
 
 
 
 
 
 
Lanolin, anhydrous for cosmetics industry  — 
Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARDS   
Foreword  
 
This Draft Tanzania Standard has been prepared by the Cosmetics and Creameries Technical 
Committee, under the supervision of Chemicals Divisional Standards Committee and it is in 
accordance with the procedures of the Bureau.  
 
This second edition cancels and replaces the first edition of TZS 1427:2011 Lanolin,  anhydrous 
for cosmetics industry  with minor changes and technical change  of deleting requirement for colour .  
 
In reporting the results of a test or analysis made in accordance with this Tanzania Standard if the 
final value observed or calculated is to be rounded of, it shall be done in accordance with TZS 4 
Rounding off numerical values.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 3  
DRAFT TANZANIA STANDARD                               CDC 3 (1 0) DTZS  
                                                                                                                               
 
 
Lanolin, anhydrous for cosmetics industry  - Specification  
 
 
 
1. Scope  
This Draft standard specifies  the requirements , sampling  and test methods for anhydrous lanolin 
for cosmetic industry . 
 
2. Normative references  
The following referenced documents are indispensable for the application of this Tanzania 
Standard. For dated references, only the edition ci ted applies. For undated references, the latest 
edition of the referenced document (including any amendments) applies :  
 
TZS 54  Methods of sampling and tests for oils and fats (Part 1) Sampling,  physical and chemical 
tests.  
TZS 774  Labelling of cosmetics products  - General requirements  
 
3. Terms and definition  
 
For the purposes of this standard, the following term and definition shall apply ; 
 
Lanolin  
fat substance found naturally in sheep’s  wool extracted as yellowish viscous mixture of esters and 
used as a base for ointment   
 
 
4. Requirement  
 
4.1  General requirement  
 
4.1.1 Description  
The material  shall be in the form of pale yellow, tenacious, unctuous mass, having a slightly 
characteristic odour.  
 
 
4.1.2 Solubility  
The material shall be sparingly soluble in 95% ethyl alcohol and freely soluble in ethyl ether and 
chloroform. Further it shall mix without any separation of layers, with twice its mass of water.  
 
 
  
 4  
 
 
 
 
 
4.2  Specific requirements  
The material shall comply with the requirements given in Table 1 .  
Table 1  – Specific requirements for Lanolin  
S/N Characteristic  Requirement  Test method  
i.  Melting  point , ºC 36 - 45 TZS 54  
ii.  Loss on drying, percent by mass, max 0.5 TZS 54  
iii.  Acid value, max 2 TZS 54  
iv.  Iodine value  18 - 32 TZS 54  
v.  Saponification value  92 - 106 TZS 54  
vi.  Petrolatum  To pass the test  Annex A  
vii.  Sulphated ash, percent by mass, max 0.15 Annex B 
viii.  Chlorides ,  To pass the test  Annex C 
ix.  Water soluble oxidizable substances  To pass the test  Annex D 
 
5. Pack aging and labelling  
 
5.1 Packing;  
The product shall be packaged in suitable well-sealed containers that shall protect the contents 
and shall not cause any contamination with the product.  
 
5.2 Labelling;  
Each container shall be labeled according to  TZS 774  (see clause 2 )  
 
6. Sampling   
 
6.1 General precautions and directions  
In drawing, preparing, storing, and handling samples the following  precautions and directions shall 
be observed.  
6.1.2 Samples shall be taken in a protected place not exposed to damp air, dust  or soot.  
6.1.3 Precautions shall be taken to protect  the samples, the material being  sampled, the sampling 
instrument and the containers for samples from adventitious contamination.  
6.1.4 The samples shall be placed in a clean and dry glass container . The  Sample containers shall 
be of such a size that they are almost completely filled by the sample.  
6.1.5 Each container shall be sealed air tight after filling and marked with full  details of sampling 
date of sampling, batch or code number, name of manufacturer and other important particulars of 
the consi gnment.  
6.1.6 Samples shall be stored in such a manner that the temperature of the  material does not vary 
unduly from the normal temperature.  
  
 5  
 
 
 
6.2 Scale of sampling  
6.2.1  Lot;  
All the containers in a single consignment of the material drawn from  a single batch of manufacture 
shall constitute a lot. If the consignment is declared to consist of different batches of manufacturer, 
the batches shall be marked separately and the groups of containers in each batch constitute lots.  
 
6.2.2  Samples shall be tested from each lot for ascertaining conformity of the  material to the 
requirements of the specification.  
 
6.2.3  The number of containers ( n) to be chosen from the lot shall depend on  the size of the lot 
(N) and shall be given in Table 2.  
 
Table 2: Number of Containers to be selected for Sampling  
 
Lot size ( n) No. of containers to be selected ( N) 
Up to 50  3 
51 to 200  4 
201 to 400  5 
401 to 650  6 
651 to 1000  7 
1001 and above  8 
 
6.2.4 The containers to be selected for sampling shall be chosen at random as follows; Starting 
from any container in the lot, count them as 1, 2, 3,.., up to r and so on in one order, where r is 
the integral part of N/n, N being the lot size and n the sample si ze. Every rth container thus counted 
shall be drawn from the lot so as to constitute the required sample size.  
 
6.3 Test Samples and Refere nce sample  
 
6.3.1  The material shall be melted, prior to sampling, if already not so.  
 
6.3.2  Lower the sampling tube ( closed type sampling tube, undivided) slowly  to a requires depth 
and draw the sample by operating the sampling tube by inserting the instrument when closed  and 
the material is admitted by opening it and finally it is closed and withdrawn from each container 
selected. The total quantity of the material drawn from each container shall be about 200  mL. 
 
6.3.3  Thoroughly mix all portions of the material drawn fr om the same container.  Out of these 
portions, equal quantities shall be taken out from each selected container and shall be well mixed 
up together so as to form a composite sample measuring not less than  600 mL. 
 
6.3.4  The composite sample shall be divided into three equal parts, one for the  purchaser, another 
for the supplier and the third for the referee. These samples shall be transferred to sample 
containers, which shall then be sealed air tight with stoppers and labeled with all the particulars of 
the sample given under 6.1.5. 
  
 6 6.3.5  The reference sample, bearing the seals of the purchaser and the  supplier, shall be used in 
case of a dispute between the two. It shall be kept in a place agreed to between the purchaser 
and the supplier.  
 
6.4 Number  of Tests  
Tests for all characteristics given in 2 shall be carried out on the composite sample.  
 
6.5 Criteria for Conformity  
The material shall be taken to have conformed to this specification, if the composite sample 
satisfies all requirements given in clause 4. 
 
7. Test methods  
Tests shall be carried out according to the methods prescribed in TZS 54 and in Annex es A to D 
of this standard.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 7  
 
 
Annex A  
(Normative)  
 
Test for Petrolatum  
 
A.1 Reagents  
95% ethyl alcohol ( rectified ) 
 
A.2 Procedure  
Boil 1.00  g of the material with 80  mL of rectified spirit. Observe the solution  
 
The material shall have passed the test, if the solution is clear or not more than opalescent.  
 
 
 
Annex B  
(Normative)  
 
Determination of Sulphated Ash  
 
 
B.1 Reagents  
Concentrated sulfur ic acid  
 
B.2 Procedure  
Weigh accurately 5.00  g of the material in a tarred crucible. Ignite  (See note), gently at first until 
thoroughly charred, then cool and moisten the residue with 1  mL of concentrated sul furic acid. 
Ignite gently until the carbon is completely consumed, then heat strongly. When the carbon has 
completely disappeared, cool the crucible in a desiccator and weigh.  
 
B.3 Calculations  
 
Sulphated ash, percent by mass =  m ×100
M          
       
Where  
m = mass in g of the residue obtained and  
M = mass in g of the material taken for the test.  
 
 
 
 
 Note: conduct the ignition in a place protected from air currents and use as low a temperature as 
possible to affect  the combustion of carbon.  
 
  
 8  
 
Annex C  
(Normative)  
 
Test for Chlorides  
 
 
C.1 Outline of the method  
Refluxing the material with alcohol isolates chlorides. The turbidity produced with silver nitrate is 
compared with that produced by a control standard.  
 
C.2 Apparatus  
Nessler cylinders 50  mL capacity  
 
C.3 Reagents  
C.3.1 ethyl alcohol - 95% ( rectified spirit ) 
C.3.2 Dilute nitric acid - 4M 
C.3.3 Silver nitrate - 2% 
C.3.4 Standard Hydrochloric acid (HCl) - 0.01M  
 
C.4 Procedure  
Boil 2.00  g of the material with 20  mL of rectified spirit under a reflux condenser, cool and filter. 
Take a filtrate in a Nessler  cylinder, add 1 mL of dilute nitric acid and 1  mL of silver nitrate solution 
and dilute to the mark with water. Car ryout control test in another Nessler cylinder using 1.0 m L 
of standard hydrochloric acid and the same quantities of other reagents as used with the sample. 
Allow the cylinders to stand for 30 min protected from direct sunlight and compare the turbidity.  
 
C.5 The material shall have be taken to have passed the test, if the turbidity produced with the 
material is not greater than that in the control test.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 9  
 
Annex D 
(Normative)  
 
Test for water soluble oxidizable substances  
 
 
D.1 Reagent  
Potassium permanganate solution 0.01M  
 
D.2 Procedure  
Warm 10.00  g of the material with 50  mL of water on a steam bath with constant stirring until it is 
melted. The fat separates completely on cooling, leaving the water layer almost clear. Separate 
the water layer, filter it and preserve the filtrate. Take a 10  mL portion of this filtrate and war m it 
with 0.5 m L of potassium permanganate solution.  
 
The material shall be taken to have passed the test, if it does not completely decolourize the 
potassium permanganate solution within 10 minutes.