& 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.
James A. Boehlert Jr.
Program Manager - Chemical Safety
Dept. of Environmental Health & Safety
262 Alexander Street
Princeton, NJ 08544
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#.
Kristi-ley Kahulugan, CPhT
Quality Control Supervisor
Westco Chemicals, Inc
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