DCHAS-L Discussion List Archive

About This Archive  |   DCHAS-L 2011 Index   |   DCHAS-L Yearly Index   |   DCHAS-L Home Page

About This Archive

DCHAS-L 2011 Index

DCHAS-L Yearly Index

DCHAS-L Home Page

---

Demystify: 

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.

Monona



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

Monona,
 
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