P 2009 (OTTO) Poly(methylhydrosiloxane) Cas 63148-57-2 - used in greener amine synthesis by reductive amination as an alternative to borohydrides. P 2009 (OTTO) Poly(methylhydrosiloxane) Cas 63148-57-2 - used in organic chemistry as a mild and stable reducing agent easily transferring hydrides to metal centers.