Date: Thu, 5 Mar 2009 21:44:27 -0800
Reply-To: Dave Parker <DParker**At_Symbol_Here**SANTACLARACA.GOV>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Dave Parker <DParker**At_Symbol_Here**SANTACLARACA.GOV>
Subject: Re: Hydroquinone UN number
Comments: To: Don Wanamaker
In-Reply-To: <9F24CFBC30A649B18BE76F124C863A60**At_Symbol_Here**EMLW072>

When looking for hydroquinone in the 2008 Emergenc y Response Guidebook, I found three entries:
Hydroquinone UN2662
Hydr oquinone, solid UN2662
Hydroquinone, solution UN3435
Since the Emergency Response Guidebook can be sear ched either by chemical name or UN number, I looked up 2662 and found two entrie s: one for hydroquinone and one for hydroquinone, solid.  Looking up 3435 afforded only one entry: hydroquinone, solution.
Three entries are listed for UN3077:
Environmentally h azardous substances, solid, n.o.s.< /DIV>
Hazardous waste, solid, n.o.s.
Other regulated s ubstances, solid, n.o.s.
"The 2008 Emergen cy Response Guidebook (ERG2008) was developed jointly by Transport Canada(TC), the U.S. Department of Transportation (DOT), the Secretariat of Transport and Communications of Mexico (SCT), and with the collaboration of CIQUIME (Cent ro de Informacion Quimica para Emergencias) of Argentina, for use by fire fighter s, police, and other emergency services personnel who may be the first to arri ve at the scene of a transportation incident involving dangerous goods."  Th e quote is from Page 2 of the ERG2008 USER'S GUIDE.
Typing "2008 Emer gency Response Guidebook" into the Google search engine afforded a number of plac es to purchase the ERG2008.
Dave Parker
Hazardous Materials Administrator
City of Santa Clara Fire Department
1675 Lincoln Street
Santa Clara, CA 95050< /DIV>

From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**] On Behalf Of Don Wanamaker
Sent: Thursday, March 05, 2009 2:13 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Re: [DCHAS-L] Hydroquinone UN number

I agree with James since hydroquinone is a hazardous substance with a reportable quantity (RQ) of 100 lbs.  Whe n offering a package for off-site shipment with a RQ within the package the re are additional marking (RQ on the outside of the package- near the marked proper shipping name) and shipping paper description (RQ either before or after the basic description) requirements.  It sounds like you may be shipping a Class 9 material.  Depending on the quantity of hydroquinone within the package, assuming th ere are no other hazards mixed in, it may or may not be regulated as a hazard ous material by the DOT.  Can there be more than 100#s of hydroquinone i n the package?
The "old DOT description" you referred t o identifies a poisonous material (Division 6.1).  Ar e you sure someone didn't look up benzoquinone on the DOT Hazardous Materials T able by mistake?  Does your hydroquinone (misture or solution?) meet the definition of a 6.1 hazardous material (see 49 CFR 173.132).
Since DOT (and emergency responders) don 't like it when a shipper "errs on the side of caution" (i.e.; overkill) and decl ares a package as being hazardous when it's not, you may want to keep asking questions.  It's Ok to ask DOT.
Good luck,
Don Wanamaker
Environmental Managemen t, Ltd.
----- Original Message -----
Sent: Thursday, March 05, 2009 1 1:19 AM
Subject: Re: [DCHAS-L] Hydroquin one UN number


                Hydroquinone has not been given a specific proper shipping name by the US Department of Transportation.  It is to the discretion of the ship per 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 II I” 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 j ust a little overkill.

Best Regards,


James A. Boehlert Jr.

Pr ogram Manager - Chemical Safety

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~< /SPAN>

Pr inceton University

De pt. of Environmental Health & Safety

26 2 Alexander Street

Pr inceton, NJ 08544

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~< /SPAN>

609-258-7882 (voice)< SPAN style="COLOR: blue">

609-258-1804 (fax)


From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of krist i-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

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Dear all,


Does anyone know the current UN# for Hydroqu inone 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