Preservatives may be safely used on wooden articles that are used or intended for use in packaging, transporting, or holding raw agricultural products subject to the provisions of this section:
(a) The preservatives are prepared from substances identified in paragraph (b) of this section and applied in amounts not to exceed those necessary to accomplish the technical effect of protecting the wood from decay, mildew, and water absorption.
(b) The substances permitted are as follows: ------------------------------------------------------------------------
List of substances Limitations------------------------------------------------------------------------Copper-8-quinolinolate.................Mineral spirits........................Paraffin wax........................... Used singly or in combination
so as to constitute not less
than 50% of the solids.Petroleum hydrocarbon resin, produced Do.
by the homo- and copolymerization of
dienes and olefins of the aliphatic,
alicyclic, and monobenzenoid
arylalkene type from distillates of
cracked petroleum stocks.Pentachlorophenol and its sodium salt.. Not to exceed 50 p.p.m. in the
treated wood, calculated as
pentachlorophenol.
Rosins and rosin derivatives........... As provided in Sec. 178.3870.Zinc salt of sulfonated petroleum......------------------------------------------------------------------------