[Histonet] Can I use no water benzoyl peroxide from PolySciences in my MMA mixture?

[abtdhu <@t> gmail.com]

I try to avoid CaCl drying step in making MMA infiltration and embedding solutions. Please help me MMA experts. Many lab use benzoyl peroxide which has 30% water in it. And go through CaCl afterwards. 
Another question, why some lab use Butanol and toluene before coverslip? Why use Cellosolve to do deplastify? I think xylene and ethanol are cheaper and less toxic, is it true?
Thanks for you reply. 

Dorothy
MGH endocrine histocore




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