Date: Tue, 16 Aug 2011 20:51:29 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: ACTSNYC**At_Symbol_Here**CS.COM
Subject: Re: CAS #s for allotropes of phosphorus

ohn,  My Hawley's says the same as your Merck.  But ACGIH has two CAS # and so do many other references.  I'm going to take a suggestion from Lynn Knudtson and contact CAS directly.  I have to wait two days to do it because if I don't attend a family gathering in the Hamptons Wednesday and Thursday, I'll be busy responding to a divorce petition.


In a message dated 8/16/2011 3:08:30 PM Eastern Daylight Time, dura_chemiker**At_Symbol_Here**YAHOO.COM writes:

I read your E-mail inquiry regarding various allotropes of phosphorous and immediately opened my Merck Index.  According to the Merck, there is only one CAS number for phosphorous [7723-14-0].  They do not provide individual CAS numbers for the different allotropes.  It also states that there are three main allotropic forms: white, black and red.  White is sometimes refered to as yellow as a result of impurities, while red is sometimes refered to as violet.  I also checked the CRC Handbook of Chemistry and Physics just for confirmation.  The Merck Index provides some health and safety information.

John D. Turner

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