lactone is a biological product and lactose is the synthetical version .....
Here are the details for the lactone:
Organic gamma-Butyrolactone 99,9+% (VE6) gamma-Butyrolactone Synonyms: 4-Hydroxybutyric acid gamma-lactone; BLO; endo-cis-5-Norbornene-endo-2,3-dicarboxylic anhydride Molecular Formula: C4H6O2 Formula Weight: 86.09 Registry number: 96-48-0 MDL number: MFCD00005386 Density: 1.12 Melting point: -45 °C Boiling point: 204-205 °C
The lactose version is the synthetical version of lactone but is not biological degradeable
And regaring legality:
The FDA issued a warning about Lactone on January 21, 1999 which asks manufacturers to voluntarily recall their lactone containing products. Our reading of this suggests that it is still legal to possess lactone federally, but it is becoming less clear whether it is legal to sell lactone for human consumption. But the DEA is currently 'watching' suppliers of the chemical.
When importing gbl you need DEA permission, you need to handover documents stating that you are enduser and you dont use it as drugs or for the production of drugs and as a reseller your customers have to fill enduser agreements 2 ......