Date sent:      	Wed, 09 Jan 2002 21:06:34 -0500
From:           	Jeff and Wanda Gray 
Subject:        	Cobalt Chloride Formula
To:             	Histo Net Server 

> Called the old place of employment today and received the following:
> 
>  1.5% Cobalt Chloride
> 
> 15 gm Cobalt Chloride
> 1000 ml Absolute Ethanol (100%)

A word of warning about cobalt chloride which you may well know 
already. This compound has for some time been classed as toxic 
and recently deemed to be a carcinogen. We have withdrawn all 
silica gel which uses cobalt chloride as an indicator and disposed 
as carcinogenic waste. The main hazard is by inhalation of the fine 
dust so be careful if you are weighing it.
Terry.
Terry Hacker,
Head of Histopathology and Electron Microscopy
Medical Research Council,
Harwell,
Didcot,
Oxfordshire, OX11 ORD
01235 824521
Fax 01235 834776
e-mail t.hacker@har.mrc.ac.uk