• Advanced Questions

  Monopropylene glycol & DPG

  Posted by LuisJavier on February 14, 2020 at 11:58 pm

  I am aware that MPG has a positive effect towards preservation, but does DPG too? 

  Bill_Toge replied 4 years, 2 months ago 3 Members · 2 Replies

  • dipropylene-glycol
  • monopropylene-glycol
  • preservation
• 2 Replies

• 

  Pharma

  Member

  February 16, 2020 at 9:07 am

  DPG is not an ‘official’ preservative but part of certain preservative blends. Many compounds similar to DPG do show a certain degree of preservation at least due to their water-binding activity and/or function as booster for other preservatives.

• 

  Bill_Toge

  Member

  February 16, 2020 at 9:10 pm

  1,2-glycols are most effective antimicrobial glycols, followed by 1,3; depending which isomer you use, DPG is anything between a 1,5- and a 1,7-glycol, so I’d wager it’s much less effective than MPG

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