Date: Thu, 5 Mar 2009 11:19:39 -0500
Reply-To: "James A. Boehlert" <boehlert**At_Symbol_Here**PRINCETON.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "James A. Boehlert" <boehlert**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: Hydroquinone UN number
Comments: To: kristi-ley kahulugan
In-Reply-To: A<633300.19565.qm**At_Symbol_Here**>


          & nbsp;     Hydroquinone has not been given a specific proper shipping name by the US Department of Transportation.  It is to the discretion of the shipper to provide a non-specific shipping name to the materials.  “Environmentally Hazardous Substances, liquid, n.o.s. UN3082, PG III” or “Environmentally Hazardous Substance, solid, n.o.s. UN3077, PG III” is usually most appropriate for hydroquinone and solutions thereof.  The n.o.s. (not otherwise specified) indicated the material is not given a specific shipping name such as “Hydroquinone, UN####, PG###.  Shipping the material as a 6.1 toxic isn’t necessarily wrong, it’s just a little overkill.

Best Regards,


James A. Boehlert Jr.

Program Manager - Chemical Safety


Princeton University

Dept. of Environmental Health & Safety

262 Alexander Street

Princeton, NJ 08544


609-258-7882 (voice)

609-258-1804 (fax)


From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of kristi-ley kahulugan
Sent: Thursday, March 05, 2009 10:48 AM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] Hydroquinone UN number

Dear all,


Does anyone know the current UN# for Hydroquinone CAS# 123-31-9? 

I was informed that below is the older UN#:


UN Number: 2662 (Class 6.1 Poison P.G. III)


Some MSDS (revised on 2008) for Hydroquinone 90-100% has a UN/NA: UN3077 and other MSDS made 2007 and below has UN #2662 (Class 6.1 Poison PG III).   All other properties are the same (CAS, % purity, properties, etc) except for the UN#.


Please help.


Thank you,


Kristi-ley Kahulugan, CPhT

Quality Control Supervisor

Westco Chemicals, Inc


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