"Cedric's allergies" and "get in some Keating's"
'I hear you're planning on taking in a child yourself. Very noble of you: Mr Potts and I talked about it, of course, and you know me, I'd dearly love to help, but my poor Cedric's allergies—' she raised an apologetic shoulder heavenwards—'well, they'd never stand it.' Mrs Potts leaned in closer and tapped the end of her nose. 'Just a little warning: those living in the East End of London have entirely different standards to our own. You'd be well advised to get in some Keating's and a good-quality disinfectant before you let one of them set foot inside the castle.'
I would like to know what do "Cedric's allergies" and "get in some Keating's" mean. Thanks for your help.