How to dispose chemical waste? if unsure what should you do?

Method One of Three:
Identifying the Proper Waste Disposal Method

Read the material safety data sheet.
chemical products come with disposal instructions right on the label and following those instructions should be enough. Even for products without disposal instructions, you should still read the labels so you can be aware of the warnings and cautions concerning said products.
Items such as batteries and light bulbs have to be recycled at special recycling centers.
Never mix cleaning products together. If you only have a small amount of cleaning product left in each bottle, it may be tempting to mix them into one bottle for disposal. Different chemicals can react with each other to form very hazardous fumes and noxious gases.

Search the list of hazardous waste

In addition to the product label, you want to read the MSDS for industrial chemicals. The MSDS gives you important information about the chemical: its toxicity, reactivity, and disposal considerations.
Every chemical product you buy should come with an MSDS sheet. However, you can also use the online MSDS database to look up the MSDS for the specific formulation of the chemical you wish to dispose.[1]

Search the list of hazardous wastes

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Sorry that’s all I know :)

Bis the answerhope it !

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.