I can't seem to find cellulose insulation that does not contain sulfates.  I see green fiber at the big box stores, and local lumberyard carries regal brand, but I think that one has the sulfate as well.

Anyone know of brands sold in the midwest without sulfate?

Thanks.

None of National Fiber's products contain sulfates, but they're pretty much a northeastern regional player.

Any vendor's "stabilized forumula" designated for wet-sprayed applications will also be sulfate free, and is fine to dry-blow.

Greenfiber's stabilized borate-only goods are products # INS735 for the general-purpose type, INS745 for the attic-specific version:

http://www.greenfiber.com/images/technicaldocuments/426201193636AMPM-6.3-316%20Rev%20B%20INS745%20Attic%20Card.pdf
http://www.greenfiber.com/images/technicaldocuments/81201121208PMMS-6.4-060%20Rev%20C%20Stabilized%20Borate%20Formula.pdf

http://www.greenfiber.com/images/technicaldocuments/10122009105133PMPM-6.3-56.pdf
http://www.greenfiber.com/images/technicaldocuments/128201084952AMMS-6.4-05%20Rev%20E%20MSDS%20GF%20INS735%20Stabilized%20Borate%20Formula.pdf

Stay away from the "stablilized blended" formulations, which may contain ammonium sulfate, eg:

http://www.greenfiber.com/images/technicaldocuments/81201115803PMMS-6.4-059%20Rev%20B%20Stabilized%20Blended%20Formula.pdf

Applegate (a MI manufacturer) makes an all-borate stabilized goods:

http://www.applegateinsulation.com/Product-Info/Insulation-Products/Bora-Spray/default.aspx

Pull the MSDS sheet on any potential product and scan the document for "sulfate".