Taken from a timber suppliers site
"TANALISED®E pressure treated timber is protected with TANALITH®E, a unique, highly effective preservative protection system based on patented copper triazole technology. The copper is derived from recycled sources and is well known for its fungicidal and insecticidal properties. The triazoles used in TANALITH E are organic biodegradable biocides, commonly used to protect many of the food crops we eat. Combining copper with a dual triazole system broadens it’s spectrum of activity to give complete protection from wood decay organisms. Performance First launched in 1992, TANALISED®E pressure treated timber is today a truly global product that is approved and used in more than 30 countries worldwide. TANALISED®E pressure treated timber is protected against fugal and insect attack and is the perfect product for use in above ground, in ground and water contact situations.
This from another
"Can TANALISED or TANATONE pressure treated timber be use for the construction of bee hives?
TANALISED E or TANATONE pressure treated timber is suitable for use in a bee hive. However, you should not use it for internal elements of the hive that will come into direct contact with honey."
If you read the bold bits that suggests it kills insects so use at your bees peril!