Alcohol Specifications

United States of America

Fuel Ethanol Ed 75 - Ed 85
(otherwise referred to as "E85")

The American Society for Testing and Materials (A.S.T.M.) have established standard D 5798-98a for "A fuel blend, nominally 75 to 85% v/v denatured fuel ethanol and 25 to 15 addition % v/v hydrocarbons, for use in ground vehicles with automotive spark-ignition engines". For full details, test procedures and a review of the significance of the properties specified, reference should be made to the Standard, which is available from A.S.T.M.

Note re classes:
The vapor pressure is varied for seasonal and climatic changes, by having three vapor-pressure classes of fuel ethanol Ed 75 - Ed 85. In most states, class 1 fuel is required in the summer months, class 2 in the spring and fall, and class 3 in the winter months. For a detailed table of classes required for each state for each month, reference should be made to the Standard, which is available from A.S.T.M.

 

Properties Specification for classes  
    Class 1

Class 2

Class 3
1. Ethanol + higher alcohols,
minimum % v/v
79 74 70
2. Hydrocarbon/aliphatic ether,
% v/v
17-21 17-26 17-30
3. Vapor pressure,
(a) kPa
(b) P.S.I

38-59
5.5-8.5

48-65
7.0-9.5

66-83
9.5-12.0
4. Lead,
maximum mg/litre (p.p.m. w/v)
2.6 2.6 3.9
5. Phosphorus,
maximum mg/litre (p.p.m w/v)
0.2 0.3 0.4
6. Sulphur,
maximum mg/kg (p.p.m w/w)
210 260 300
    All Classes
7. Methanol,
maximum % v/v
0.5 (5000 p.p.m v/v)
8. Higher alcohols (C3 - C8),
maximum % v/v
2 (20,000 p.p.m v/v)
9. Acidity, as acetic acid,
maximum mg/kg (p.p.m w/w)
50
10. Solvent-washed gum content,
maximum mg/100 ml (p.p.m w/w)
5 (50 p.p.m w/v)
11. Unwashed gum content,
maximum mg/100 ml
20 (200 p.p.m w/v)
12. Total chlorine as chlorides,
maximum mg/kg (p.p.m w/w)
2
13. Inorganic chloride,
maximum mg/kg (p.p.m w/w)
1
14. Copper,
maximum mg/litre (p.p.m w/v)
0.07
15. Water,
maximum % mass
1.0
16. Appearance This product shall be visibly free of suspended or precipitated contaminants (clear and bright). This shall be determined at ambient temperature or 21C (70F), whichever is higher.



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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