The use of plastics and glass in extraction Teks.

Recently I have found myself looking for additional uses for certain containers and the like that were used at one point for food grade preps. I also have been trying to modify what I use in my extractions so that i can minimize the over use of glass that could etch over time. I have seen some TEKs use HDPE and the like.

The use of Polypropylene(PP) #5 would be best for any applications where the use of and acid or base is in use without an organic solvent. It has a very high melting point(~160° C) so it could be used in the heating or cooling process if you use the A/B method with out the risk of it melting or deforming.
PP is not resistant to organic solvents, so the use of this plastic would not be advisable in the naphtha pulls or any other organic solvent for that matter.

The use of High Density Polyethylene(HDPE) #2 would be best for any applications where the use of solvents or other chemicals may be present. It is not as heat resistant as PP, but can withstand temperatures up to 110° C on a continuous basis. This would be ideal for the naphtha pulls and even a hot water bath.

The use of Polyvinyl chloride(PVC) #3 would be best for chemical use. It is not typically used in bottles or containers. With concerns of the chlorine being released from it when it does break down would also be a deterrent in the use of PVC. It has a melting point of 80° C.

If you tend to have trouble finding HDPE or PP style bottles or containers, just look in the fridge or in your pantry. I use Sunny D bottles and vegetable spread containers for most of my needs. I still use glass or pyrex to heat my solvent, to freeze precipitate, and for any recrystallization.

I also have started using champagne flutes to grow crystals. They are a little bit harder to work with, but since they have a smaller bottom the formation is a bit better. I will be trying a martini glass with the next grow test.

Anyone else that have any thoughts on the use of plastics or glasses with extractions please add on.