©TBS 201 9 – All rights reserved                                                                                   First Edition  2019 
  
 
 
 
 
 
 DRAFT TANZANIA STANDARD  
 
 
 
 
 
 
 
TBS/CDC 7(5422) P 3 Industrial denatured  spirit - Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TANZANIA BUREAU OF STANDARDS  
 
 
 TBS/CDC 7( 5422 ) P3 
 
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Foreword  
 
This Draft Tanzania Standard is being developed by the In dustrial an d 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 has been prepared with assistance drawn from:  
BS 3591: 198 5 (Current, Confirmed June 2016) Specification for Industrial 
methylated spirits published by British Standards Institution.  
 
In reporting the test results of a test or analysis made in accordance with this 
standard, if final value, calculated o r observed is to be rounded off, it shall be done in 
accordance with TZS 4  Rounding off numerical values . 
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 TBS/CDC 7( 5422 ) P3 
 
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 DRAFT TANZANIA STANDARD                                  TBS/CDC 7( 5422 ) P3 
 
 
Industrial denatur ed spirit s - Specifica tion  
 
 
1. Scope  
This Draft Tanzania Standard specifies  requirements , methods of sampling and test 
of industrial denatured  spirit s. It does not apply to material for medicinal and food 
purposes.   
 
 
2. Normative references  
The following documents are referre d in the text in such a way that some or all of 
their content constitutes  requirements of this document. For dated refer ences, only 
the edition cited applies. For undated references,  the latest edition of the referenced 
document (including any amendments) applies.  
 
TBS/CDC 7 ( 5772 ) P3/ISO 758 Liquid chemical products for industrial use – 
Determina tion of density at 20 ⁰C; 
 
TBS/CDC 7 ( 5773 ) P3/ISO 759  Volatile organic liquids for industrial use – 
Determination of dry residue after evaporation on water bath – General method;  
 
TBS/CDC 7 ( 5774 ) P3/ISO 2211  Liquid chemical products - Measurement of colo ur 
in Hazen units (Pla tinum -cobalt scale);  
 
TBS/CDC 7 ( 5775 ) P3/ISO 3165  Sampling of chemical product for industrial use – 
Safety in sampling;  
 
TBS/CDC 7 ( 5776 ) P3/ISO 1388 -2 Ethanol for industrial use – Methods of test – Part 
2: Detection of alkalinity or  acidity to phenolphth alein;  
 
TBS/CDC 7 ( 5777 ) P3/ISO 1388 -5 Ethanol for industrial use – Methods of test – Part 
5: Determination of aldehyde content – Visual colo rimetric method;  
 
TBS/CDC 7 ( 5778 ) P3/ISO 1388 -6 Ethanol for industrial use – Methods of test  – Part 
6: Test for mi scibility with water;  
   
3. Terms and definitions  
Denaturant  
toxic or foul -smelling substance added to alcohol to make it unfit for drinking  
 
4. Requirements  
 
4.1 General requirements  
The material  shall consist of spirits (essential ly ethanol, C 2H5OH and  water) to which 
a denaturant  has been added. It shall be clear, colourless and free from matter in TBS/CDC 7( 5422 ) P3 
 
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 suspension, as assessed by visual inspect ion, and shall consist of a mixture of 95 
volumes of spirits of appropriate ethanol content w ith 5 volumes of  denat urant (such 
as wood napht ha). 
 
4.2 Specific requirements  
The material shall comply with the specific  requirements in Table 1 when tested as 
per methods specified in clause 2.  
 
Table 1: Requirements  for industrial methylated spirits  
S/N Characteristics  Requirements  Method of Test  
1. Colour, in Hazen units, max 20 ISO 2211  
2. Density, in air at 20 ⁰C, g/mL, max 0.8103  ISO 758  
3. Ethan olic strength, % (v/v), min 95 Annex A  
4. Miscibility with water 
(ethanol:water ), 1: 19 (v/v)   No opalescence  ISO 1388 -6 
5. Acidity (as CH 3COOH), % (m/m), 
max 0.005  ISO 1388 -2 
6. Residue s on evaporation, % 
(m/m), max 0.01 ISO 759  
7. Carbonyl compounds content, (as 
acetaldehydes), % (m/m)  max 0.10 ISO 1388 -5 
8. Alkalinity   Negative  ISO 1388 -2 
 
5. Sampling  
The material shall be sampled according to the method specified in ISO 3165 (see 
clause 2).  
 
6. Packing  and labelling 
 
6.1 Packaging  
The material shall be supplied in clean, dry and tight containers, without faults, made 
of material which does not react with  alcohol. The method of closing the containers 
shall prevent the contents from contamination and evaporation.  
 
6.2 Labelling  
Each container shall bear the following information given in prominent, legible and 
durable labelling:  
a) Manufacturer’s name.  
b) Recognized trade mark, if any.  
c) Name of the material  as “denatured spirit – industrial grade  
d) Name of denaturant  
e) Nom inal volume  
f) Nominal value for material strength.  
g) Batch number.  
h) Manufacturing date  
i) Pictorial symbols to show flammability and toxicity nature.  
 
7. Storage  
The material shall be s tored in suitable container  which shall not affect integrity of the 
product in  terms of quality.  
  TBS/CDC 7( 5422 ) P3 
 
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Annex  A 
 
(Normative ) 
 
Relationship between density in air and alcoholic  strength  
 
Table 2 gives the relation between density in air and alcoholic  strength, expressed in 
either percentage by volume, or as a percentage by mass, at  a 20 ⁰C. 
 
Table 2: Relationship between density in air and alcoholic strength  
 
         Density in air (g/mL)                 Alcoho lic strength at 20 ⁰C 
                    20 0C               % (m/m)            % (v/v) 
                   0.8281                  85.7              90.0 
                   0.8264                  86.3              90.5 
                   0.8248                  87.0              91.0 
                   0.8231                  87.6              91.5 
                   0.8213                  88.3              92.0 
                   0.8196                  89.0              92.5 
                   0.8178                  89.6              93.0 
                   0.8160                  90.3              93.5 
                   0.8141                 91.0              94.0 
                   0.8122                  91.7              94.5 
                   0.8103                  92.4              95.0 
                   0.8083                  93.1              95.5 
                   0.8063                  93.8              96.0 
                   0.8043                  94.6              96.5 
                   0.8022                  95.3              97.0 
                   0.8000                  96.1              97.5 
                   0.7978                  96.8              98.0 
                   0.7955                  97.6              98.5 
                   0.7932                  98.4              99.0 
                   0.7907                  99.2              99.5 
                   0.7882                100.0             100.0  
 
 
 
 
Note: For comprehensive ethanolic strength table refer Annex B  
 
 
 
 
 
 
 
 TBS/CDC 7( 5422 ) P3 
 
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 Annex B  
(Informative ) 
 
 
Comprehensive alcoholimetric table  TBS/CDC 7( 5422 ) P3 
 
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Bibliography  
 
 
https: //en.oxforddictionaries.com/definition/denaturant  
 
BS 3591: 1985 Specification for industrial methylated spirits  published by British 
Standards Institution.