Disposal of chemical solutions

[Nads343]

Hey all, I have a container of Sodium Sulphide that has sunken into itself and disfigured. It has been taped up by the previous labbie and sounds like it is liquified. There's a statement on the bottle to refrigerate but it has been sitting on the shelf since (2006?). How do I dispose of this please?

[RosalieL]

From RiskAssess:

Screenshot 2024-11-27 at 2.59.44 PM.png

[bigmack]

It is now spelt Sodium Sulfide. taken from the CSIS sodium sulfate*
. . . decahydrate
. . . anhydrous
Glauber's salt
K-12
1
2
3
4
5
6
PS
NR

Not Hazardous -
-
7727-73-3 Harmless.
Disposal: Waste solutions of this chemical may be disposed of down the sink (to sewer).

Q-Stores

15 is the Disposal number

Definitely not Sodium Sulfate .Labbie
The Red teacher only sticker and Hazardous on Bottle was an indication to look a bit further .

[Labbie]

Oh Thanks Bigmack I removed my post

[Nads343]

Thanks guys! I don't have access to Riskassess yet (hopefully in the new year!) so this helps a lot. My school can't justify a chemical cleanup for a small amount of waste which is understandable, what's the next best step in containing this chemical? I'll see if other schools in my area are doing an end-of-year clean up, otherwise I was thinking of storing it in the fridge?

[bigmack]

My take on it is that the reason to store it in a fridge is to keep it less reactive .( although the version you have is not an oxidizer so less likely to spontaneously combust ) The only thing that concerns me is that it is highly corrosive .
So I would put it inside an other container before refrigerating .

does your local rubbish /recycling center have chemicals collection ?

Ours does in Hervey Bay . I can take all my chemicals to them and they don't charge .I just attach an SDS to each container .

[Nads343]

Thanks bigmack! I ended up calling the local disposal centre and unfortunately they only dispose of household chemicals. They referred me onto the local firies who told me it's an emergency response and had to call the emergency services number to have it contained. They contained it into the fridge and taped it up until we can dispose of it safely.

Guess who has an approval for a chemical clean up now!

[Labbie]

Chemical
Category & User Codes
DG Class
DG PG
UN CAS No
Guidance notes
sodium sulfide*
hydrated, with >30% water of hydration
11-12
1
2
-
-
5
-
-
8

DHS

CW

Hazardous Chemical II 1849
1313-82-2 Highly toxic if ingested. Corrosive to skin since strongly alkaline. Use eye and skin protection where splashes can occur.Releases toxic hydrogen sulfide gas on contact with moisture; reacts with acids to form hydrogen sulfide. Use in a fume cupboard if practicable; otherwise use small quantities (<10 mL or g) in a well-ventilated area.
29

See also hydrogen sulfide. This is the correct one