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Subject: Re: [DCHAS-L] chemical receiving

Date: Jun 29, 2012 08:31 UTC

Author: Robert E. Belford <rebelford**At_Symbol_Here**UALR.EDU>

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Subject: Re: [DCHAS-L] Lab Safety Discussion List

Date: Jun 29, 2012 09:19 UTC

Author: 8524828hau**At_Symbol_Here**COMCAST.NET

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From: ACTSNYC**At_Symbol_Here**CS.COM

Subject: Re: [DCHAS-L] silica gel

Date: Jun 29, 2012 09:16 UTC

Reply-To: DCHAS-L

In-Reply-To:  

Demystify: 

The forms of amorphous silica for which there are or have been health standards are * ditomaceous earth-calcined,
* diatomaceous earth-uncalcined,
* precipitated and gel,
* fumed, and
* fused. 

fumed is the only one that has no NIOSH, MAK, OSHA, of AIHA standard and the TLV was withdrawn. 

Monona

In a message dated 6/28/2012 8:34:40 PM Eastern Daylight Time, rmainer**At_Symbol_Here**GMAVT.NET writes:

All,

Is silica gel the same thing as fumed silica (e.g. Cabosil, Aerosil)?

Ray

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