Wood-spirit, petroleum and coal-tar distillates are condensed in plant of the latter type.
The "general" mixture consists of Too litres of spirit, and 5 litres of wood spirit or 2 litre of pyridine.
In France, the general denaturizing agent is wood-spirit of at least 58 over-proof, and containing 25% of acetone and 2.5% of "impurites pyrogenees"; 10 litres of this spirit denaturizes Too litres of alcohol.
METHYL ALCOHOL (CH 2 OH), the simplest aliphatic alcohol; an impure form is known in commerce as wood-spirit, being produced in the destructive distillation of wood.
The amount of methyl alcohol present in wood spirit is determined by converting it into methyl iodide by acting with phosphorus iodide; and the acetone by converting it into iodoform by boiling with an alkaline solution of iodine in potassium iodide; ethyl alcohol is detected by giving acetylene on heating with concentrated sulphuric acid, methyl alcohol, !under the same circumstances, giving methyl ether.