Japanese Industrial Standard K 8101 - 1987
Anhydrous Ethanol
Ethanol (99.5) / Ethyl Alcohol (99.5)
C2H5OH M.W. : 46.07
Note: This standard is an edited, abridged version of the standard. It includes extensive changes and corrections of the original, official translation, to make it more intelligible. For full details, reference should be made to the original standard, which is available from the Japanese Standards Association, Tokyo.
Test | Premium grade | Grade 1 |
Miscibility in water | Within the limits | Within the limits |
Specific gravity (20/20°C) | 0.793 max. | 0.793 max. |
Water content % | 0.4 (4,000 p.p.m) max. | 0.4 (4,000 p.p.m) max. |
Non-volatile matter % | 0.001 (10 p.p.m) max. | 0.003 (30 p.p.m) max. |
Acids, as acetic acid | Within
the limits Approx. 0.002 % (20 p.p.m) max. |
Within
the limits Approx. 0.002 % (20 p.p.m) max. |
Alkalis, as ammonia | Within
the limits Approx. 0.0001 % (1 p.p.m) max. |
Within
the limits Approx. 0.0001 % (1 p.p.m) max. |
Heavy metals, as Pb % | 0.0001 (1 p.p.m) max. | 0.0002 (2 p.p.m) max. |
Aldehydes
and ketones, as acetaldehyde |
Within
the limits Approx. 0.001 % (10 p.p.m) max. |
Within
the limits Approx. 0.001 % (10 p.p.m) max. |
Fusel oils, as pentanol | 0.004 % (40 p.p.m) max. | 0.004 % (40 p.p.m) max. |
Methanol | 0.02 % (200 p.p.m) max. | 0.02 % (200 p.p.m) max. |
Benzene
and other organic impurities, as benzene |
Within
the limits Approx. 0.005 % (50 p.p.m) max. |
Within
the limits Approx. 0.005 % (50 p.p.m) max. |
Permanganate
reducing substances, as oxygen equivalent |
Within
the limits Approx 0.0003 % (3 p.p.m) max. |
Within
the limits Approx. 0.0003 % (3 p.p.m) max. |
Sulfuric acid coloring substances | Within the limits | Within the limits |
Ethanol content (by specific gravity) | 99.5 % min. | 99.5 % min. |
Note: The Parts per Million (p.p.m) figures in parentheses do not appear in the original standard, but have been inserted to facilitate comparison with other standards.
1. | Water miscibility | Mix 10 ml of the sample in 30 ml of water, and test it in accordance with method 5.2 of JIS K 8001. The mixture should be transparent after standing for one hour. | ||||||||||||||||||||||||||||||||||||||||||||
2. | Specific gravity (20/20°C) | The specific gravity shall be measured in accordance with method 3.2.1 of JIS K 0061. | ||||||||||||||||||||||||||||||||||||||||||||
3. | Water Content | Test 10 g of the sample in accordance with method 2.1 (4) (a) (ii) of JIS K 0068. | ||||||||||||||||||||||||||||||||||||||||||||
4. | Non-volatile matter | Test 100 g of the sample in accordance with method 2.3.1 (2) of JIS K 0067. The amount of residue shall be not more than 1 mg. (The residue can be used for the test of heavy metals). | ||||||||||||||||||||||||||||||||||||||||||||
5. | Acid and alkali | Test 20 ml of the sample in accordance with 5.6 (1) of JIS K 8001 using water free of carbon dioxide. | ||||||||||||||||||||||||||||||||||||||||||||
6. | Heavy metals, as Pb | Add 1 ml of hydrochloric acid to the residue form test 4 (for non-volatile matter) and evaporate to dryness on a water bath, then add 1 ml of hydrochloric acid and dilute with water to 30 ml. Take 15 ml of this solution and test it in accordance with 5.24 (1) of JIS K 8001. | ||||||||||||||||||||||||||||||||||||||||||||
7. | Aldehydes and ketones | Dilute 5 ml of the sample with water to 10 ml, and add 1 ml of 2,4-dinitrophenylhydrazine solution into 1 ml of this mixture. Heat it in a water bath at about 50°C for 30 min, and then after cooling it, add 5 ml of ethanolic potassium hydroxide solution. After 5 min standing, compare this color with the color obtained as follows: Take 4 ml of standard acetone solution (0.01 mg CH3COCH3/ml) and add 5 ml of ethanol and add water to make up to 10 ml; then add 1 ml of 2,4-dinitrophenylhydrazine solution into 1 ml of this solution, and, after treatment similar to above-mentioned, let it stand for 5 min. The color in the test sample solution shall not be darker than the yellowish-red shown in the standard solution. | ||||||||||||||||||||||||||||||||||||||||||||
8. | Fusel oil (as C5H12O) | Dissolve 1 g of sample in water to make 10 ml solution. Take 1 ml of this solution, and gently add 2 ml of freshly prepared vanillin-sulfuric acid solution (0.5 g vanillin in 100 ml sulfuric acid), followed by stirring. After heating for 15 min in boiling water, add 1 ml of water and, after sufficient stirring, let it stand for 15 min. Compare this color with the color obtained as follows: Mix 0.6 ml of water with 0.4 ml of isoamyl alcohol standard solution (0.01 mg C5H12O/ml), and gently add 2 ml of vanillin-sulfuric acid solution; after treatment similar to the above-mentioned, let it stand for 15 min. The color in the sample solution shall not be darker than the yellowish-red given in the standard solution. | ||||||||||||||||||||||||||||||||||||||||||||
9. | Methanol (CH3OH) | Methanol
content shall be tested in accordance with the gas-chromatography
method 5.32 of JIS K 8001 under following conditions:
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10. | Benzene and other organic impurities | Measure the absorbance of the sample standard with the wavelength of maximum absorption, in the neighborhood of 255 nm, taking water as the contrast solution, using a 10 mm quartz absorption cell, in accordance with JIS K 0115. The absorbance shall be not more than 0.11. | ||||||||||||||||||||||||||||||||||||||||||||
11. | Permanganate reducing substances | Add 0.1 ml of 0.02 mol/l (0.1N) potassium permanganate solution to 20 ml of the sample that has been adjusted to 25°C, and, after agitating it, hold it for 5 min at 25°C. The color of this solution shall not be lighter than the red color given by a colorimetric standard solution. | ||||||||||||||||||||||||||||||||||||||||||||
12. | Sulfuric acid coloring substances | This test shall be in accordance with method 5.26 (2) (a) of JIS K 8001. In this instance, when 10 ml of sample are mixed with 10 ml of sulfuric acid, there should be no development of color. | ||||||||||||||||||||||||||||||||||||||||||||
13. | Ethanol Content (by specific gravity) | According to the value obtained in test 2, the specific gravity should be not more than 0.793. |
Reference Table | Specific Gravity Table of Ethanol (99.16 to 100.01 v/v %) | ||||||||
Specific gravity (20/20°C) |
Contents v/v % |
Specific gravity (20/20°C) |
Contents v/v % |
Specific gravity (20/20°C) |
Contents v/v % |
Specific gravity (20/20°C) |
Contents v/v % |
Specific gravity (20/20°C) |
Contents v/v % |
0.7949 |
99.16 | 0.7939 | 99.36 | 0.7929 | 99.56 | 0.7919 | 99.77 | 0.7909 | 99.96 |
8 |
99.19 | 8 | 99.38 | 8 | 99.59 | 8 | 99.78 | 8 | 99.98 |
7 |
99.20 | 7 | 99.40 | 7 | 99.61 | 7 | 99.80 | 7 | 99.99 |
6 |
99.22 | 6 | 99.43 | 6 | 99.62 | 6 | 99.82 | 6 | 100.01 |
5 | 99.24 | 5 | 99.44 | 5 | 99.64 | 5 | 99.83 | ||
4 | 99.27 | 4 | 99.46 | 4 | 99.67 | 4 | 99.86 | ||
3 | 99.28 | 3 | 99.48 | 3 | 99.69 | 3 | 99.88 | ||
2 | 99.30 | 2 | 99.51 | 2 | 99.70 | 2 | 99.90 | ||
1 | 99.32 | 1 | 99.53 | 1 | 99.72 | 1 | 99.91 | ||
0 | 99.35 | 0 | 99.54 | 0 | 99.74 | 0 | 99.93 |
5.2 GRADE 1: Test methods for this
grade are the same as for Premium Grade above, with the following variations:
1. | Non-volatile matter | The non-volatile matter shall be measured in accordance with method 5.1 (4). But, in this instance, the sample should be 50 g and the residue should be not more than 1.5 mg. |
2. | Heavy metals, as Pb | The heavy metals shall be measured in accordance with method 5.1 (6), with minor variations, as appropriate. |