Company Directory and Keywords

[cRen]

Hello, I have created a business directory. Let's say the name of the company I added is "Alp Industry." Would it be logical to just write "Alp Industry" in the keyword section, or should I also add the products that the company manufactures as keywords? After all, someone using Google may not know about Alp Industry but may be curious about who sells XXX product. I think my logic is correct. So, one keyword will be "Alp Industry" and the other will be the products it manufactures, like toilet paper. But wouldn't it be harmful to enter too many keywords? Or, considering that there are 40 more companies like Alp producing toilet paper, would it be problematic for SEO if all 40 companies were given the keyword "toilet paper"? I looked at directories, and generally, some only write the company name, some don't even write the company name, and some only write keywords.