Question about security deposit and business account

[Vasudev Kirs]

My tenant will be transferring security deposit into my business account. Are there any restrictions on whether I can use it for other expenses or should they stay in that account?  Below are the laws from my state regarding security deposit:

https://revisor.mo.gov/main/OneSection.aspx?section=535.300

1. Can I move security deposit into a brokerage account or should it stay in the original business account?

2. If it needs to stay in the original account, can I use it to pay for other expenses?

3. Can I move rental income into a brokerage account?

Thank you!