SCHEDULEFORMULATIONS FOR THE CLASSES OF DENATURED ALCOHOL, STANDARDS AND OTHER RELATED PROVISIONS
Formulation for completely denatured alcohol
F11.
Completely denatured alcohol must be made in accordance with the following formulation: with every 100 parts by volume of alcohol mix 3 parts by volume of isopropyl alcohol, 3 parts by volume of methylethylketone and one gramme of denatonium benzoate (of the description mentioned in paragraph 4).
Formulation for industrial denatured alcohol
2.
Industrial denatured alcohol must be made in accordance with the following formulation: with every 95 parts by volume of alcohol mix 5 parts by volume of wood naphtha or of a substitute for wood naphtha. Where a substitute for wood naptha is used, the volume mixed with every 95 parts of alcohol may be less than 5 parts if—
(a)
the proportion of the marker in the resulting mixture is–
(i)
in the case of methyl alcohol, not less than 36 parts per thousand,
(ii)
in the case of tertiary butyl alcohol, not less than one part per thousand, or
(iii)
in the case of another marker approved by the Commissioners, not less than the proportion specified by the Commissioners when they approved that marker, and
(b)
the resulting mixture contains the other substances that the Commissioners approved when they approved the substitute for wood naptha in the proportions that they specify.
Formulations for trade specific denatured alcohol
3.
Except in cases where the Commissioners approve an alternative formulation, trade specific denatured alcohol must be made in accordance with one of the following formulations—
(a)
with every 999 parts by volume of alcohol (of a strength of not less than 85 per cent alcohol by volume) mix 1 part by volume of tertiary butyl alcohol, and to the resulting mixture add denatonium benzoate (of the description specified in paragraph 4) in the proportion of 10 micrograms per millilitre;
(b)
with every 979 parts by volume of alcohol (of a strength of not less than 85 per cent alcohol by volume) mix not less than 20 parts by volume of cyclohexane and 1 part by volume of isopropyl alcohol;
(c)
with every 979 parts by volume of alcohol (of a strength of not less than 85 per cent alcohol by volume) mix not less than 20 parts by volume of ethyl acetate and 1 part by volume of isopropyl alcohol;
(d)
with every 975 parts by volume of alcohol (of a strength of not less than 85 per cent alcohol by volume) mix not less than 20 parts by volume of methyl alcohol and 5 parts by volume of hexane;
(e)
with every 950 parts by volume of alcohol (of a strength of not less than 85 per cent alcohol by volume) mix not less than 50 parts by volume of benzyl benzoate;
(f)
with every 980 parts by volume of alcohol (of a strength of not less than 85 per cent alcohol by volume) mix not less than 20 parts by volume of isopropyl alcohol, and to the resulting mixture add denatonium benzoate (of the description specified in paragraph 4), in the proportion of 10 micrograms per millilitre;
(g)
with every 950 parts by volume of alcohol (of a strength of not less than 85 per cent alcohol by volume) mix not less than 50 parts by volume of isopropyl alcohol;
(h)
with every 990 parts by volume of alcohol (of a strength of not less than 85 per cent alcohol by volume) mix 10 parts by volume of methylethylketone (consisting of 95 to 96 per cent by weight of methylethylketone, 2.5 to 3 per cent by weight of methylisopropylketone, and 1.5 to 2 per cent by weight of ethylisoamylketone), and to the resulting mixture add 1 gram of denatonium benzoate (of the description specified in paragraph 4);
(i)
with every 990 parts by volume of alcohol (of a strength of not less than 85 per cent alcohol by volume) mix 10 parts by volume of methyl alcohol and to the resulting mixture add denatonium benzoate (of the description specified in paragraph 4) in the proportion of 10 micrograms per millilitre.
Denatonium benzoate
4.
Denatonium benzoate (F2mentioned in paragraphs 1, 3 and 6) is benzyldiethyl [(2,6-xylycarbamoyl) methyl] ammonium benzoate.
Use of water
5.
When making denatured alcohol in accordance with a formulation specified in paragraph 1, 2 or 3, water may be mixed with the alcohol before denaturing or with the denatured alcohol but the quantity of water added must not reduce the proportion or quantity of denaturing substances F3... in the resulting mixture below the proportions or quantities specified in the formulation; and for the purpose of ascertaining the proportion or quantity of denaturing substances F3... in any such mixture the water shall be treated as if it were alcohol.
Standards for wood naphtha, other denaturing substances and dyes.
6.
Wood naphtha, and substitute for wood naphtha
7.
(1)
Wood naphtha must, to the satisfaction of the Commissioners, possess such properties as to render a mixture of one part of the naphtha with 19 parts of alcohol of a strength of not less than 95 per cent alcohol by volume unfit for human consumption.
(2)
Wood naphtha must contain not less than 72 per cent by volume of methyl alcohol.
(3)
In the case of a substitute for wood naphtha—
(a)
the substitute must possess, to the satisfaction of the Commissioners, such properties as to render a mixture of one part of the substitute with 19 parts of alcohol, of a strength of not less than 95 per cent alcohol by volume, unfit for human consumption,
(b)
all the ingredients and their amounts which are to constitute the substitute must be approved by the Commissioners, and
(c)
the substitute must contain as a marker—
(i)
not less than 72 per cent by volume of methyl alcohol, or
(ii)
2 per cent by volume of tertiary butyl alcohol, or
(iii)
such other marker as may be approved by the Commissioners in the proportions specified by them.
Crude pyridine
F68.
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Mineral naphtha (petroleum oil)
F79.
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Methyl violet dye (Colour Index Constitution No. 42555)
F810.
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Quality
11.
All substances used in the production of denatured alcohol must be of sufficient quality to ensure that the alcohol is properly denatured.
Notes:
F9(1)
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F9(2)
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