BS 553:1990 download.Specification for Ethyl acetate for industrial use.
1 Scope
BS 553 specifies requirements for ethyl acetate suitable for industrial purposes.
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
2 Description
The material shall be clear and free from matter in suspension, as assessed by visual inspection, and shall consist essentially of the ethyl ester of acetic acid (CH3COOC2H5).
3 Sampling and size of sample’ A representative sample of the material measuring
not less than 0.5 T. shall be taken from the bulk for the purpose of examination in accordance with this standard. The sample shall be placed in a clean, dry and air-tight, ground glass-stopped bottle, or screw-capped bottle fitted with a polyethylene cone insert, of such capacity that it is almost filled by the sample.
NOTE I When it is necessary to seal the container, care should be taken to avoid the risk of contaminating the contents in any way.
NOTE 2 SutTicient ullage should be left in the bottle to avoid excessive pressure changes that could arise from temperature variations during storage and handling. About 10 % ullage is recommended.
4 Colour
The colour of the material shall not exceed 10 Hazen colour units when measured by the method described in BS 5339.
5 Density
The density of the material at 20°C, measured by the method described in BS 4522, shall be not lower than 0.898 g/mL and not higher than 0.901 g/mL.
6 Distillation range
When the material is distilled by the method described in BS 4591, modified as described in Appendix A, the initial boiling point at 101.3 kPa pressure shall be not lower than 76.5 °C and the dry point at 101.3 kPa pressure shall be not higher than 78.5 °C.
7 Residue on evaporation
The residue on evaporation of the material shall not exceed 0.0020 % (rn/rn) when determined by the method described in BS 4524.
8 Water content
The material shall not contain more
than 0.10 % (rn/rn) of water when determined by the method described in clause 2 of BS 2511:1970 using 20 mL of the material.
9 Acidity
The acidity of the material, calculated as acetic acid (CH3COOH), shall not exceed 0.0050 % (rn/rn) when determined by the method described in Appendix B.
10 Ester content
The material shall contain not less
than 99.0 % (rn/rn) of esters, calculated as ethyl acetate (CH3COOC2H5), when determined by the method described in Appendix C.