A low phosphate 10% (v/v) formaldehyde solution phosphate buffered at pH 7.0± 0.1 (250C). Offers Improves preservation of intracellular substances when easy handling, consistent tissue penetration and added to glutaraldehyde. fixation and compliments our other low methanol Behnke & Zelander, J.Ultrastruct. Res., 31, 424 (1970) and methanol free fixatives. 25g Available in easy-carry 20 litre packs.