From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**list.uvm.edu] On Behalf Of Don Wanamaker
Sent: Thursday, March 05, 2009 2:13 PM
Subject: Re: [DCHAS-L] Hydroquinone UN numberKristiley,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.
845-429-1141----- Original Message -----F rom: James A. BoehlertSent: Thursday, March 05, 2009 1 1:19 AMSubject: 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.
James A. Boehlert Jr.
Pr ogram Manager - Chemical Safety
Pr inceton University
De pt. of Environmental Health & Safety
26 2 Alexander Street
Pr inceton, NJ 08544
609-258-7882 (voice)< SPAN style="COLOR: blue">
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: B> DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] Hydroquinone UN number
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#.
Kristi-ley Kahulugan, CPhT
Quality Control Supervisor
Westco Chemicals, Inc