(a) Any poisonous or deleterious substance added to any food, except where such substance is required in the production thereof or cannot be avoided by good manufacturing practice, shall be deemed to be unsafe for purposes of the application of subparagraph (B) of subdivision (1) of subsection (a) of § 21a-101, but, when such substance is so required or cannot be so avoided, it shall be deemed to be unsafe for purposes of the application of said subdivision unless a tolerance for such substance has been prescribed under the federal act and the quantity of such substance in or on the food is within the tolerance so prescribed, or the substance has been exempted from the requirement of a tolerance under the provisions of the federal act.

(b) A food additive shall, with respect to any particular use or intended use of such additive, be deemed to be unsafe within the meaning of said subdivision, unless it and its use or intended use conform to the terms of an exemption as provided under the federal act, or a regulation issued under the federal act prescribing the conditions under which such additive may be safely used.

(c) Any poisonous or deleterious pesticide chemical, or any pesticide chemical which is not recognized by the commissioner and director, acting jointly, as safe for use, added to a raw agricultural commodity, shall be deemed unsafe within the meaning of said subdivision, unless a tolerance for such pesticide chemical in or on the raw agricultural commodity has been prescribed under the federal act and the quantity of such pesticide chemical in or on the raw agricultural commodity is within the tolerance so prescribed; or the pesticide chemical has been exempted from the requirement of a tolerance under the provisions of the federal act.

(d) A color additive shall with respect to any particular use, for which it is being used or intended to be used or represented as suitable, in or on food or drugs or cosmetics, be deemed unsafe for the purposes of the application of subdivision (3) of subsection (a) of § 21a-101, subdivision (4) of subsection (a) of § 21a-105, or subsection (e) of § 21a-111, as the case may be, unless there is in effect, and such color additive and such use are in conformity with, regulation as provided under the federal act, or such color additive and such use conform to the terms of an exception under the federal act.