I've been looking at A to Z of materials trying to determine how much time it is worth spending on building a company profile and adding additional information
http://www.azom.com/suppliers.aspx?SupplierID=2343
DA is 50+ and PA for a new listing seems to be 17 of so. My site currently has a DA of about 20. Once of my competitors seems to have put a lot of time into it
Other than a profile you can also write articles and post news. It's worth pointing out that as a whole the sector has no useful blogs and most linkbuilding is done via directory listings. And Most companies have back links from less than 20 other root domains.
Thoughts would be gratefully received