All of the separated or mixed cresols are produced in commercial quantities in this country. Consumption in the United States, especially of types and grades used in synthetic resins, has increased appreciably in recent years, and is supplied chiefly by domestic production. A comparison of the quantity and value of domestic production and of imports in 1934 is shown in table 83. TABLE 83.—_The cresols: Comparison of production and imports, 1934_ ---------------+------------------------------+-------------------------- | Production | Imports Product +----------+--------+----------+--------+------+---------- | Quantity | Value |Unit value|Quantity| Value|Unit value ---------------+----------+--------+----------+--------+------+---------- | _Pounds_ | | |_Pounds_| | Metacresol | ([1]) | ([1]) | | 21,054|$8,400| $0.399 Paracresol | ([2]) | ([2]) | $0.350| 38,935|10,344| .266 Metaparacresol | 2,033,424|$122,005| .060| ([1]) | ([1])| Orthocresol | 835,016| 66,801| .080| 25,865| 2,711| .105 Orthometapara | | | | | | cresol | 8,929,836| 625,088| .070| 38,744|12,906| .333 +----------+--------+----------+--------+------+---------- Total |11,798,276| 813,894| | 124,598|34,361| ---------------+----------+--------+----------+--------+------+---------- [1] None, production reported for first time in 1935. [2] Not publishable. Sources: Production, Dyes and Other Synthetic Organic Chemicals in the United States; imports, invoice analyses, U. S. Tariff Commission. SYNTHETIC TAR ACIDS OTHER THAN PHENOL Certain synthetic tar acids other than synthetic phenol are used commercially in the manufacture of synthetic resins in the United States. Among these are para tertiary amyl phenol, para tertiary butyl phenol, ortho phenyl phenol, para phenyl phenol, and resorcinal. Para tertiary amyl phenol. Para tertiary amyl phenol is made by reacting amylene with phenol in the presence of sulphuric acid as a catalyst. At ordinary temperatures it is a solid, melting at about 88° C. and boiling between 250°-265° C. Its use is of increasing importance as a component in tar-acid resins, especially in oil-soluble varnish resins. Owing to its phenol coefficient of approximately 60, it is also used as a germicide, fumigant, and insecticide. Commercial production was reported for the first time in 1933. Since then the output has increased appreciably each year, accompanied by material reductions in sales prices.