A tolerance of 30 parts per million is established for acetone in spice oleoresins when present therein as a residue from the extraction of spice. Sec. 173.220 1,3-Butylene glycol.
1,3-Butylene glycol (1,3-butanediol) may be safely used in food in accordance with the following prescribed conditions:
(a) The substance meets the following specifications:
(1) 1,3-Butylene glycol content: Not less than 99 percent.
(2) Specific gravity at 20/20 C: 1.004 to 1.006.
(3) Distillation range: 200-215 C.
(b) It is used in the minimum amount required to perform its intended effect.
(c) It is used as a solvent for natural and synthetic flavoring substances except where standards of identity issued under section 401 of the act preclude such use.