BS 506-1:1987 download free.Methanol for industrial use – Part l : Specification for methanol.
1 Scope
BS 506-1 specifies requirements for methanol suitable for industrial purposes.
NOTE The titles of the publications referred to in this standard are listed on 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 methanoL CH; OH.
3 Sampling and size of sample
A sample of not less than I L shall be taken in accordance with BS 506-2.
4 Colour
The colour of the material shall not exceed 15 Hazen units when measured as described in BS 53:39.
5 Density
The density of the material at 20 °C shall be not lower than 0.791 gImL and not higher than 0.794 g/mL when determined as described in
BS 4522.
6 Distillation range
When the material is distilled as described in BS 4591, modified as specified in BS 506-2, the distillation range at 1 013 mbar’ pressure shall not exceed 1.0°C and shall include the value 64.6 °C.
7 Residue on evaporation
The residue on evaporation on the material shall not exceed 0.00 1 % (rn/ni) when determined as described in BS 4524.
8 Miscibility with water
The material shall not show opalescence when mixed with distilled water as described in BS 506-2.
9 Alkalinity or acidity
The material shall not be alkaline to phenolphthalein and shall not contain more than 0.003 % (ni/rn) of acid. calculated as formic acid (HCOOH) and determined as described in
BS 506-2.
10 Aldehydes and ketones
The material shall not contain more than 0.005 % (rn/rn) of aldehydes and ketones. calculated as acetone (CH.COCH) and determined by the spectrometric method described in BS 506-2.
11 Sulphur compounds
The material shall not contain more than 0.000 1 % (rn/rn) of sulphur compounds, calculated as S and determined as described in BS 506-2.
12 Permanganate test
The material shall not cause the colour of a standard potassium permanganate solution to fade sufficiently in 30 mm to match or be lighter than the matching solution when tested as described in
BS 506-2.
13 Water content
The material shall not contain more than 0. 1 % (rn/rn) of water when determined as described in clause 2 of BS 2511:1970.