Return-Path: Received: (qmail 9507 invoked from network); 10 Jan 2001 15:04:05 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by extortion.plus.net with SMTP; 10 Jan 2001 15:04:05 -0000 Received: (qmail 16353 invoked from network); 10 Jan 2001 15:06:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 10 Jan 2001 15:06:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14GMjd-0001WQ-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 10 Jan 2001 15:00:21 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from anchor-post-34.mail.demon.net ([194.217.242.92]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14GMjc-0001WL-00 for rsgb_lf_group@blacksheep.org; Wed, 10 Jan 2001 15:00:20 +0000 Received: from jalowe.demon.co.uk ([158.152.173.18]) by anchor-post-34.mail.demon.net with esmtp (Exim 2.12 #1) id 14GMjS-0004kd-0Y for rsgb_lf_group@blacksheep.org; Wed, 10 Jan 2001 15:00:10 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <56R4lKA7hHX6Ew8L@jalowe.demon.co.uk> Date: Wed, 10 Jan 2001 14:58:03 +0000 To: rsgb_lf_group@blacksheep.org From: "J. Alan Lowe" Subject: Re: LF: re Paraffin Wax References: <65AECDF1F89AD411900400508BFC869F0D74FC@pdw-mail-1.dera.gov.uk> In-reply-to: <65AECDF1F89AD411900400508BFC869F0D74FC@pdw-mail-1.dera.gov.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: Turnpike Integrated Version 5.01 U Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Talbot Andrew writes >What is Liquid Paraffin as used in medecine ? >or petroleum jelly (Vaseline) ? > Liquid paraffin is a highly refined mixture of paraffins, and having a boiling range typically 300°C to 360°C. It is odourless because of its high vapour pressure, and the fact that aromatic hydrocarbons (benzene derivatives) are absent. Petroleum jelly consists of high molecular weight paraffins, and is a colloidal system of branched chain solid paraffins and high-boiling liquid paraffins, in which most of the liquid hydrocarbons are held inside the micelles (assemblies of molecules). Alan, G3XZX