ASTM D 6845 - 12 Standard Test Method for Silica, Precipitated, Hydrated - CTAB (Cetyltrimethylammonium Bromide) Surface Area

Current edition approved Jan. 1, 2012. Published February 2012. Originally approved in 2002. Last previous edition approved in 2008 as D6845 – 02 (2008). — 4 p.
This test method covers the measurement of the specific surface area of precipitated silicas exclusive of area contained in micropores too small to admit hexadecyltrimethylammonium bromide (cetyltrimethylammonium bromide, commonly referred to as CTAB) molecules. This test method is suitable for characterizing rubber-grade silicas of all types.