Sodium hydroxide in plastic bottles
- nickykinz
- Posts: 271
- Joined: 02 Feb 2009, 12:53
- Job Title: Lab Assistant
- School: St Augustine's College
- Suburb: Augustine Heights
- State/Location: QLD
Sodium hydroxide in plastic bottles
I had heard that NaOH solutions should be stored in plastic bottles as over time it reacts with the glass and I have transferred all my NaOH. I hadn't really thought about the other hydroxides though. Should I also transfer the potassium and calcium hydroxide? Are there any other solutions that should be stored in plastic?
Nicky
St Augustine's College
Augustine Heights, QLD 4300
St Augustine's College
Augustine Heights, QLD 4300
- Labbie
- Posts: 3247
- Joined: 28 Nov 2006, 10:00
- Job Title: Retired
- Suburb: At Home
- State/Location: NSW
Re: Sodium hydroxide in plastic bottles
Where did you hear that NaOH solutions should be stored in plastic bottles? OUr CSIS tells us to store them in amble coloured glass bottles with a rubber stopper. Mine are in amble glass with just caps, have been fine for over 15 years now. THat is a corrosive solutions, and some plastics would go brittle after a while. Some plastics have a diamond shape on the bottom with a number, make sure it is a number for corrosives, I am so sorry I do not know the correct number on plastic bottles for corrosives. BUt perhaps Rob does.
Regards Labbie
Lab Manager/Lab Tech, mind reading etc etc
Now retired
Lab Manager/Lab Tech, mind reading etc etc
Now retired
Re: Sodium hydroxide in plastic bottles
Yeah, plastic bottles do get brittle over time. It may be due to light as much as contents. All 1 and 2 litre containers of solutions I have made up are in plastic bottles and have been forever. But occassionally I gently squeeze the bottles at the top to see if they have gone brittle. I did this after a bottle of NaOH solution broke over the Head Teacher's clothes a long time ago.
- Krysia Lee
- Posts: 228
- Joined: 27 Oct 2009, 10:40
- Job Title: Labbie
- School: Brigidine College
- Suburb: St Ives
- State/Location: NSW
Re: Sodium hydroxide in plastic bottles
If its stored in a glass bottle over time soidum silicate forms. For our sorts of pracs the amount of Si aren't deterimental to our results. You do have to have a plastic top not a glass stopper as the glass will freeze shut. Having said that I store mine in plastic bottles.
- nickykinz
- Posts: 271
- Joined: 02 Feb 2009, 12:53
- Job Title: Lab Assistant
- School: St Augustine's College
- Suburb: Augustine Heights
- State/Location: QLD
Re: Sodium hydroxide in plastic bottles
I heard it on our Qld labbies discussion list a while ago and it has been mentioned again recently. Sounds like it isn't as big a deal as I thought. Using glass stoppers in glass bottles is a definite no no though. I'll keep an eye on the brittleness of my bottles!
Nicky
St Augustine's College
Augustine Heights, QLD 4300
St Augustine's College
Augustine Heights, QLD 4300