Kurt- Liner Differences for Long-Term Storage

[DancingHeretik]

My brother just bought lots of nic and is shopping for long-term storage. He works with some harsh chemicals, especially chlorinated water, and knows how badly harsh chemicals can degrade rubber.

What's usually recommended is:
http://www.amazon.com/dp/B003G2ZXKQ...TF8&colid=1PI3TEM1N8TC0&coliid=I2JY3HVP0DM3ZT

However, he's concerned that those liners might degrade over time (10 years plus) because they remind him of some plastics that he's seen that degrade with long-term exposure to chlorine. The rubber looks similar to him.

He wants to know if this kind of liner would be more resistant: I-Chem Brand 200 Series Type III Glass Amber Boston Round Bottle, Pre-Cleaned, With PTFE-Lined Silicone Liner: Science Lab Jars: Amazon.com: Industrial & Scientific

 

[twgbonehead]

Why bother with a liner at all? Plain glass works very well (cobalt or brown). Much less expensive as well.

I would worry that any liner could potentially leach chemicals into the juice that, at best would negatively affect the taste.

ETA: Perhaps I'm confused. Is the liner on the entire inside of the bottle, or just the cap?

 

[salemgold]

Here is a post from Kurt on how to store nicotine long term.

http://www.e-cigarette-forum.com/fo...ttle-help-freezing-nic-juice.html#post2126610

 

[DancingHeretik]

The liner is in the plastic cap.

Here are the choices:
PTFE-Lined Silicone Liner vs. Black Phenolic Rubber Lined Screw Cap

One liner is silicone, the other is rubber. Which will break down faster when exposed to PG-based nicotine?

Thanks for the link, Salem. Kurt says he uses eurodropper inserts, which are better for making small batches because they require a syringe. I wonder what the eurodropper inserts are made of.

 

[DancingHeretik]

Does anyone know if nic in PG is more acid or base? Because bleach is alkaline, and it dissolves rubber.


ETA: Nevermind. I found it. PG is neutral (PH of about 7).

 

[Kurt]

I guess this would be directed at me!

The eurodropper inserts I believe are polyethylene. I have seen no degradation of them at all after years of storage. They are meant to be very chemically resistant.

I would not store long term in anything but glass. Definitely not with any rubber. I recall glycerin bottles in labs I've worked in that had rubber-bulb droppers (it was used for lubricant for some glass joints), and after years the bulbs had gone gooey from the glycerin.

PG is about the same acidity as water, pretty neutral. So is VG. The dissolving affect on rubber is not so much acid or base, but solubility. With bleach it is a chemical reaction too.

Any plastic will be porous to O2, and depending on the plastic, could have plasticizers leach into the liquid. Glass, like the bottles I mention, is forever and nonporous. PTE is less porous than PE, but PTE has phthalate plasticizers, and I'm not interested in vaping those.

I have yet to find better storage bottles than those that I chose back in 2010. I hate bottles with wide open mouths just itching to be spilled when I'm mixing. I prefer the euros and syringe dispensing through their center hole. Its just easier and no chance of spilling. And it acts as a gasket for the cap.

Still my favorite, after all these years: Amber Euro Glass Bottle 50 ml w/ Dropper Cap (Blk)

 

[Alien Traveler]

At work I use bottles similar to ones you mentioned in your second link for storing various nasty (and poisonous) chemicals. PTFE lining is very durable and resistant to chemicals. However, e-liquid (and nicotine) suppliers are selling bottles with polyethylene cone liner which should be pretty good for nicotine. I would not buy anything without polyethylene or PTFE lining.

 

[DancingHeretik]

Thank you both! PTFE-Lined Silicone Liner it is!

The Euro insert actually sounds fine for me. But, my brother intends to dump an entire 250 ml bottle of nicotine each time he mixes. No way he would want to use a syringe.