Search found 19 matches

by astagni
22 Oct 2019, 09:02
Forum: Chemistry and Labware - General
Topic: Water purifier - deioniser etc
Replies: 24
Views: 3871

Water deioniser

Hi there,
Wondering if anyone has purchased new water deionisers lately. We have an old Elgastat B114, that is starting to fall apart, the inlet and outlet caps have become brittle and considering the cost of the replacement cartridges, considering replacing it.
Thanks
by astagni
24 Sep 2019, 14:42
Forum: Chemistry and Labware - General
Topic: Microscopes for senior Biology
Replies: 5
Views: 386

Re: Microscopes for senior Biology

Thanks Macca, what microscope did you end up going with?
by astagni
24 Sep 2019, 12:00
Forum: Chemistry and Labware - General
Topic: Microscopes for senior Biology
Replies: 5
Views: 386

Microscopes for senior Biology

Hi there.
Looking at purchasing new microscopes for seniors, maybe with a camera! Has anyone had any experience using Smartphone adaptors, whether it would be a cheaper option? Would appreciate your opinion and recommendations. Many thanks... Annie
by astagni
12 Aug 2019, 13:04
Forum: Safety with Chemicals
Topic: Disposal of Sodium Thiosulfate?
Replies: 14
Views: 1834

Sodium thiosulfate

I'm confused!! !
Needed to label some more Sodium thiosulfate containers. Prevously to subscribing to Riskassess, I've used Chemwatch. Riskassess says "not classified as hazardous", blue dot etc However Chemwatch lists it with "warning' and ' toxic to aquatic life'. Interested in any comments
by astagni
25 Jun 2018, 14:38
Forum: Sourcing Materials & Eq Repairs
Topic: Dropper bottle teats
Replies: 30
Views: 3286

Re: Dropper bottle teats

If anyone out there is after the old style rubber teats.... Officemax has them for $0.69c. I just ordered some and were here in two days.
by astagni
02 Mar 2018, 13:30
Forum: Forum Support Desk
Topic: Can't view attached files
Replies: 3
Views: 1814

Re: Can't view attached files

Thanks Elizabeth..... derhhh! Must be Friday!
by astagni
02 Mar 2018, 09:27
Forum: Forum Support Desk
Topic: Can't view attached files
Replies: 3
Views: 1814

Can't view attached files

For some reason I'm seeing this message for some posts. Can anyone advise what this means?
" You do not have required permission to view files attached to this post"
Thanks
Annie
by astagni
23 Nov 2017, 13:15
Forum: Safety with Chemicals
Topic: Sodium chromate
Replies: 11
Views: 1222

Re: Sodium chromate

Hi guys, Linotos. Thanks for your reply. The IB students are starting their Internal Assessment and the teacher at this point has given me a list of chemicals needed, not the actual prac, thus the query regarding Sodium chromate and the use of chromates in general. Regarding the CSIS Samantham....Th...
by astagni
23 Nov 2017, 11:33
Forum: Safety with Chemicals
Topic: Sodium chromate
Replies: 11
Views: 1222

Re: Sodium chromate

They are using the solid. yes, I checked the SDS. It's a S6 poison, toxic, etc
Excuse my ignorance regarding the CSIS. I thought the online version which you need a department 'log in' might have been the 'new ' version? But am gathering its the OLD one just uploaded? Such confusion.
by astagni
23 Nov 2017, 10:30
Forum: Safety with Chemicals
Topic: Sodium chromate
Replies: 11
Views: 1222

Sodium chromate

Hi there, Hoping for some valuable opinions on the use of chromates in senior chemistry. I have been ask to buy Sodium Chromate for IB chemistry but am reluctant because of its classification. Am interested in what the the new CSIS says. I'm from an independent school and don't have access to latest...
by astagni
18 Nov 2016, 08:45
Forum: Recipes and Pracs
Topic: hydrogen peroxide and magnesium oxide
Replies: 9
Views: 1127

Re: hydrogen peroxide and magnesium oxide

Insanity!
Using 35% peroxide in the first place...NO!
by astagni
25 Jul 2016, 14:37
Forum: Recipes and Pracs
Topic: Iron II Sulfate
Replies: 14
Views: 1789

Re: Iron (11) Sulfate Gone Grown

I make it up fresh and make up just enough to cover the prac activity. I usually weigh out lots of 7g and keep it in glass vials, so all I need to do is make them up to 250ml for a 0.1m solution.
by astagni
06 May 2016, 14:44
Forum: Biology, Physics...
Topic: Autoclave
Replies: 16
Views: 2013

Re: Autoclave

We ended up buying a domestic pressure cooker from Target for $60.... Ronson RPA 800, 6L Electric. It does the job .
by astagni
04 May 2016, 10:55
Forum: Safety with Chemicals
Topic: Chem store
Replies: 10
Views: 1038

Chem store

Morning all, with all the who ha on GHS labelling etc ....I am interested in what posters/ information you have on the actual door of your chem store and what is the legal requirement?
Thanks for any knowledge you may have as Safe Work have me on hold waiting, waiting!
by astagni
03 Feb 2016, 09:30
Forum: Chemistry and Labware - General
Topic: Burettes
Replies: 2
Views: 513

Burettes

Welcome back all,
Looking at buying burettes . Westlab has these Glass PTFE modular stopcock (A grade) Wondering if anyone has bought these and any opinion you may have? Considering the price of these compared to glass ones, are they worth a go? (page 7 in catalogue)
Thanks for any suggestions