This entry covers mixtures of propadiene with 1 to 4% methylacetylene as well as the following mixtures:

+---------+---------------------------------------------------------------------+
| Mixture |                      Content, % by volume                           |
|         +---------------------------------------------------------------------+
|         | Methylacetylene | Propane and   | C4-saturated  | Permitted techni- |
|         | and propadiene, | propylene,    | hydrocarbons, | cal name for pur- |
|         | not more than   | not more than | not less than | poses of 5.4.1.1  |
+---------+-----------------+---------------+---------------+-------------------+
|   P1    |       63        |       24      |       14      | "Mixture P1"      |
+---------+-----------------+---------------+---------------+-------------------+
|   P2    |       48        |       50      |       5       | "Mixture P1"      |
+---------+-----------------+---------------+---------------+-------------------+