TBS/CDC7 (5417 ) P3 
©TBS 201 8– All rights reserved                                                                                  Second Edition 201 8 
 
 
 
DRAFT TANZANIA STANDARD  
 
 
 
 
 
 
 
 
 
 
TBS/CDC7 (541 6) P3 Lime ( Quick and Hydrated ) for Chemical 
industries – Specification  (Revision of TZS 586: 2001)  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARD   
©TBS 201 8– All rights reserved                                                                                                  Second Edition 201 8 
 
 
 
1 
 Foreword  
 
This Draft Tanzania Standard is being developed by the Industrial and Laboratory Chemicals Technical 
Committee under supervision of the Chemicals Divisional Standards Committee and it is in accordance 
with the procedures of the Bureau.  
 
This Draft Tanzania Standard is the first revision of TZS 586: 2001  Lime (Quick and Hydrated lime)  for 
Chemical industries – Specification . In this second  edition the following technical changes  are proposed ; 
- Clause 4.2 Table 2 and 3; the maximum level for acid insoluble matter (as SiO 2) increase d depending  on 
intended application.   
 
In the preparation of this standard assistance has been obtained from the following standards:  
IS 1540 (Part 1  and 2 ): 2015 - Specification for quicklime and hydrated lime for chemical industries 
published by Bureau of Indian Standards ; and  
 
ASTM C911:2006 (Reapproved 2011)  Standard Specification for  Quicklime, Hydrated Lime, and 
Limestone for Selected  Chemical and Industrial  Uses published by ASTM International.  
 
In reporting the result of a test or analysis made in accordance with this standard if the final value, calculated 
or observed is to be rounded off, it shall be done in accordance with TZS 4 Rounding off numerical values.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
©TBS 201 8– All rights reserved                                                                                                  Second Edition 201 8 
 
 
 
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DRAFT TANZANIA STANDARD                                                    TBS/CDC7 (5417) P 3 
 
 
Lime (Quick and Hydrated lime) for Chemical industries –Specification  
 
 
1. Scope  
 
1.1 This Draft S tandard prescribes the requirements for quicklime and hydrated lime suitable for the following 
chemical and Industrial uses; bleaching powder, paper , textile s, varnishes , sugar, calcium carbide, soda ash, 
caustic soda, w ater treatment , tanning and grease manufacturing.  
 
1.2 This standard does not cover lime for building, agricultural, metallurgical, glass and ceramic industries . 
 
2. Normative references  
 
The following referenced document s are indispensable for the application of this standard;  the latest edition of 
the referenced document s (including any amendments) appl y; 
 
TZS 2190  Methods of sampling of lime and limestone products  
 
TZS 2191  Methods of test for chemical analysis of limestone, quicklime and hydrated lime.  
 
TZS 648  Specification for limestone for chemical industries . 
 
TZS 2192  Standard terminology relating to Lime and Limestone (as used by the industry)  
 
3. Terminologies  
For the purpose of this standard, terminologies from TZS 2192 shall apply:  
 
4. Requirements  
 
4.1 Physical requirements  
4.1.1 Appearance  
Quicklime and hydrated lime shall be in the form of lumps or fine white powder free from dirt and other foreign 
matter  
 
4.1.2 Particle size  
Quicklime and hydrated lime shall satisfy requirements  in Table 1.  
 
 
 
 
 
 
 
  
©TBS 201 8– All rights reserved                                                                                                  Second Edition 201 8 
 
 
 
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Table 1: Particle size requirements  
 
Intended application  100% passing 
through  Nature of the 
product  
Pulp and paper , textile, varnish  and Sugar  89 microns  Powder  
Calcium carbide , Grease , Soda ash, Water treatment 
and tanning   - lumps  
 
4.2 Chemical requirements  
Quicklime and hydrated lime  shall comply with the chemical characteristics  specified in Table 2 and Table 3 
when tested according to the metho d prescribed in TZS 2190 . 
 
Table 2. Requirements for Quicklime for Chemical Industries  
  
 
 
Characteristic  Requirement on intended application  
(on non -volatile basis)  Methods of test 
according to  
TZS 2191  S/N 
 Bleaching 
powder, paper, 
textiles and 
varnish  Sugar and 
Calcium 
carbide  Soda ash, 
caustic soda, 
water treatment 
and tanning  
1.  Available lime (as CaO 
percent by mass, min.  92 90 85 7 
 
2.  Acid insoluble matter (as 
SiO 2), percent by mass, 
max 3.0 1.0 2.0 10 
3.  Carbon dioxide (as CO 2) 
percent by mass , max  2.0 2.5 3.0 17 
4.  Iron (as Fe 2O3) percent by 
mass, max  0.4 0.4 0.4 11 
5.  Sulfur (as S) percent by 
mass,  max N/A 0.6 N/A 14 
6.  Manganese (as Mn 2O3) 
per cent by mass, max  0.03 0.03 N/A 16 
7.  Alumina (as Al 2O3) percent 
by mass, max  1.0 1.0 1.7 11 
8.  Magnesium oxide (as 
MgO) percent by mass, 
max 1.5 2.0 3.0 13 
9.  Dead burnt lime (as CaO) 
percent by mass, max  N/A 2.0 3.0 12 
 
 
Note:  
N/A – Not applicable a s the  parameter is  not critical for respective application  
 
 
  
©TBS 201 8– All rights reserved                                                                                                  Second Edition 201 8 
 
 
 
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Table 3.  Requirements for Hydrated lime for Chemical Industries  
 
  
 
 
Characteristic  Requirement on intended application  
(on non -volatile basis)  Methods of test 
according to  
TZS 2191  S/N 
 Grease  
manufacturing  Stable 
bleaching 
powder,  Water treatment  
1.  Available lime [as 
Ca(OH) 2]percent by mass, 
min. 90 88 86 7 
 
2.  Acid insoluble matter (as 
SiO 2), percent by mass, 
max 1.0 3.0 2.0 10 
3.  Carbon dioxide (as CO 2) 
percent by mass , max  1.0 2.0 2.5 17 
4.  Iron (as Fe 2O3) percent by 
mass, max  N/A 0.2 0.3 11 
5.  Manganese (as Mn 2O3) 
per cent by mass, max  N/A 0.03 0.03 16 
6.  Alumina (as Al 2O3) percent 
by mass, max  N/A 0.3 0.3 11 
7.  Magne sia (as MgO) 
percent by mass, max  1.5 1.0 1.0 13 
8.  Dead burnt lime (as CaO) 
percent by mass, max  N/A 2.0 2.0 12 
Note:  
N/A – Not applicable as the parameter is not critical for respective application   
Note: For samples which are in the form of hydrated lime determine the loss on ignition as given in TZS 2191 in order to 
correct the mass of the test portion in the sample.  
 
5. Packaging  and Labelling  
 
5.1 Packaging  
Quicklime and hydrated lime shall be packed in air -tight and moisture proof containers.  
 
5.2 Labelling  
5.2.1 When Quick  lime and hydrated lime  aresupplied in packages, each package shall be legible  and 
indelibly labelled in English and/or Swahili with the following information:  
a) Name  andintended use  of the material;  
b) Net content ; 
c) Name and address of Manufacturer  
d) Trade mark if any and;  
e)  Batch number  
 
5.2.2 When supplied in bulk, label bearing the above information shall be conspicuously displayed on the 
carrier and also placed inside.   
©TBS 201 8– All rights reserved                                                                                                  Second Edition 201 8 
 
 
 
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6. Sampling and testing  
 
6.1 The method for sampl ing of the Quicklime and hydrated lime  shall be done as prescribed in TZS 2190 . 
 
6.2 The method of testing of the samples shall be done according to TZS 2191 .